| 1. |
- Araujo, L. F., et al.
(författare)
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In-fiber optofluidic alignment of Au-nanorods
- 2017
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Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. ; , s. 132-133
-
Konferensbidrag (refereegranskat)abstract
- Optofluidic all-fiber devices are used for orientation of Au-nanorods under strongelectric fields. The dynamics is studied on sub-microsecond time-scales. A two-level laser rateequation model allows inferring diffusion rate, rotational mobility and other parameters.
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| 2. |
- Araujo, Leonardo F., et al.
(författare)
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Photonics with special optical fibers and nanoparticles
- 2016
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Ingår i: Optics InfoBase Conference Papers. - 9781943580163
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Konferensbidrag (refereegranskat)abstract
- Optical properties of nanorods in the presence of external electric field when confined to a special optical fiber was investigated, showing an increase of the longitudinal absorption peak in the presence of the field.
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| 3. |
- Arias, Augusto, et al.
(författare)
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Simultaneous rotation, orientation and displacement control of birefringent microparticles in holographic optical tweezers
- 2013
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Ingår i: Optics Express. - : Optical Society of America. - 1094-4087. ; 21:1, s. 102-111
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Tidskriftsartikel (refereegranskat)abstract
- We report the experimental implementation of a new method for generating multiple dynamical optical tweezers, where each one of them is generated with an independent linear polarization state with arbitrary orientation. This also allows an independent simultaneous polarization-rotation control. The laser beam, both for generating multiple traps and polarization control, has been modulated using a single reflective nematic liquid crystal with parallel alignment. We present experimental results of controlled displacement, orientation and rotation of birefringent particles. In addition, a simple method for estimating and canceling out the primary astigmatism present in the system is presented.
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| 4. |
- Etcheverry Cabrera, Sebastian, 1988-
(författare)
-
Advanced all-fiber optofluidic devices
- 2017
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Significant technological advances of the last years have been possible by developments in Optofluidics, which is a field that deals with the integration of optics and microfluidics into single devices.The work described in this thesis is based on five scientific publications related to the use of fiber optic technology to build integrated optofluidic devices. The first three publications are within the field of life-science and point towards in-vivo and point-of-care applications, whereas the last two publications cover the study and the use of plasmonic nanoparticles for electrical modulation of light.Aiming at developing useful tools for in-vivo biological applications, the first publication consists of designing and testing a functional optical fiber for real-time monitoring and selective collection of fluorescent microparticles. This probe relies on a microstructured optical fiber with a hole along its cladding, which is used to selectively aspirate individual particles of interest once their fluorescence signal is detected. On the same line of research, the second publication contemplates the fabrication of a fiber probe that traps single microparticles and allows for remote detection of their optical properties. This probe is also based on a microstructured fiber that enables particle trapping by fluidic forces. The third publication addresses the development of an all-fiber miniaturized flow cytometer for point-of-care applications. This system can analyze, with excellent accuracy and sensitivity, up to 2500 cells per second by measuring their fluorescence and scattering signal. A novel microfluidic technique, called Elasto-inertial microfluidics, is employed for aligning the cells into a single-stream to optimize detection and throughput.The fourth publication involves the experimental and theoretical study of the electrical-induced alignment of plasmonic gold nanorods in suspension and its applicability to control light transmission. This study is done by using an all-fiber optofluidic device, based on a liquid-core fiber, which facilitates the interaction of light, electric fields, and liquid suspensions. Results show that nanorods can be aligned in microseconds, providing a much better performance than liquid-crystal devices. Finally, the fifth publication consists of an upgrade of the previous device by integrating four electrodes in the cladding of the liquid-core fiber. This improvement enables nanosecond response time and the possibility of digitally switching nanorods between two orthogonal aligned states, overcoming the limitation of slow thermal relaxation.The work presented here shows that optofluidics based on optical fibers is a robust and convenient platform, as well as a promising direction for the developing of novel instruments in fields such as life-science, non-linear optics, plasmonic, and sensing.
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| 5. |
- Etcheverry, Sebastián, et al.
(författare)
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All fiber based micro-flow cytometer by combining optical fiber with inertial focusing
- 2016
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Ingår i: 20th International Conference on Miniaturized Systems for Chemistry and Life Sciences (MicroTAS 2016). - : Chemical and Biological Microsystems Society. - 9780979806490 ; , s. 1655-1656
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Konferensbidrag (refereegranskat)abstract
- Towards a portable point of care flow cytometry platform, we present here an integrated all optical fiber-based optofluidic system capable of counting and discriminating fluorescent particles and cells. The robust and compact device incorporates optical fibers and circular capillaries to build an all-fiber optofluidic device to enable counting particles based on their fluorescent and back-scatter light emission. Here, we combine this with inertial- and elasto-inertial microfluidics for sheathless particle and cell focusing for integrated detection with scattering and fluorescence detections - all necessary components of standard cytometers. We validated the system for cell counting based on scattering and fluorescence.
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| 6. |
- Etcheverry, Sebastian, et al.
(författare)
-
All silica fibre microflow cytometer
-
Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Flow cytometry is currently the gold standard for analysis of cells in the medical laboratory and biomedical research. Fuelled by the need of point-of-care diagnosis, a significant effort has been made to miniaturize and reduce cost of flow cytometers. However, despite recent advances, current microsystems remain less versatile and much slower than their large-scale counterparts. In this work, an all-silica fibre microflow cytometer is presented that measures fluorescence and scattering from particles and cells. It integrates cell transport in circular capillaries and light delivery by optical fibres Single-stream cell focusing is performed by Elasto-inertial microfluidics to guarantee optical accuracy and sensitivity. The capability of this technique is extended to high flow rates (up to 800 µl/min), enabling throughput of 2500 particles/s. The robust, portable and low-cost system described here could be the basis for a point-of-care flow cytometer with a performance comparable to commercial systems.
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| 7. |
- Etcheverry, Sebastian, et al.
(författare)
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Digital electric field induced switching of plasmonic nanorods using an electro-optic fluid fiber
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Ingår i: Applied Ecology and Environmental Research. - 1589-1623 .- 1785-0037.
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Tidskriftsartikel (refereegranskat)abstract
- We demonstrate the digital electric eld induced switching of plasmonic nanorods between 1 and 0 orthogonal aligned states using an electro-optic fluid fiber component. We show by digitally switching the nanorods, that thermal rotational diffusion of the nanorods can be circumvented, demonstrating an approach to achieve sub-microsecond switching times. We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 nanoseconds. The high-speed digital switching of plasmonic nanorods integrated into an all-ber optical component may provide novel opportunities for remote sensing and signaling applications.
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| 8. |
- Etcheverry, Sebastián, et al.
(författare)
-
Digital electric field induced switching of plasmonic nanorods using an electro-optic fluid fiber
- 2017
-
Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 111:22
-
Tidskriftsartikel (refereegranskat)abstract
- We demonstrate the digital electric field induced switching of plasmonic nanorods between "1" and "0" orthogonal aligned states using an electro-optic fluid fiber component. We show by digitally switching the nanorods that thermal rotational diffusion of the nanorods can be circumvented, demonstrating an approach to achieve submicrosecond switching times. We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 ns. The high-speed digital switching of plasmonic nanorods integrated into an all-fiber optical component may provide opportunities for remote sensing and signaling applications. © 2017 Author(s).
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| 9. |
- Etcheverry, Sebastian, et al.
(författare)
-
Digital switching of plasmonic nanorods with nanosecond response times
-
Tidskriftsartikel (refereegranskat)abstract
- We demonstrate the digital electric field induced switching of plasmonic nanorods between "1" and "0" orthogonal aligned states using an electro-optic fluid fiber component. We show by digitally switching the nanorods, that thermal rotational diffusion of the nanorods can be circumvented, demonstrating an approach to achieve submicrosecond switching times. We also show, from an initial unaligned state, that the nanorods can be aligned into the applied electric field direction in 110 nanoseconds. The high-speed digital switching of plasmonic nanorods integrated into an all-fiber optical component may provide novel opportunities for remote sensing and signaling applications.
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| 10. |
- Etcheverry, Sebastián, et al.
(författare)
-
Fluidic trapping and optical detection of microparticles with a functional optical fiber
- 2017
-
Ingår i: Optics Express. - : Optical Society of America. - 1094-4087. ; 25:26, s. 33657-33663
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Tidskriftsartikel (refereegranskat)abstract
- A fiber probe is presented that traps single micro-sized particles and allows detection of their optical properties. The trapping mechanism used is based on fluid suction with a micro-structured optical fiber that has five holes along its cladding. Proof-of-principle experiments with a diluted solution of fluorescently labeled particles are performed. The fiber probe presented here may find various applications in life-science and environmental monitoring. ©
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| 11. |
- Etcheverry, Sebastián, et al.
(författare)
-
High performance micro-flow cytometer based on optical fibres
- 2017
-
Ingår i: Scientific Reports. - : Nature Publishing Group. - 2045-2322. ; 7:1
-
Tidskriftsartikel (refereegranskat)abstract
- Flow cytometry is currently the gold standard for analysis of cells in the medical laboratory and biomedical research. Fuelled by the need of point-of-care diagnosis, a significant effort has been made to miniaturize and reduce cost of flow cytometers. However, despite recent advances, current microsystems remain less versatile and much slower than their large-scale counterparts. In this work, an all-silica fibre microflow cytometer is presented that measures fluorescence and scattering from particles and cells. It integrates cell transport in circular capillaries and light delivery by optical fibres. Single-stream cell focusing is performed by Elasto-inertial microfluidics to guarantee accurate and sensitive detection. The capability of this technique is extended to high flow rates (up to 800 mu l/min), enabling a throughput of 2500 particles/s. The robust, portable and low-cost system described here could be the basis for a point-of-care flow cytometer with a performance comparable to commercial systems.
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| 12. |
- Etcheverry, Sebastian, et al.
(författare)
-
Identification and collection of particles with optical fibers
- 2015
-
Ingår i: NOVEL BIOPHOTONICS TECHNIQUES AND APPLICATIONS III. - : SPIE. - 9781628417050
-
Konferensbidrag (refereegranskat)abstract
- A micro-structured fiber-based system for identification and collection of fluorescent particles is demonstrated. An optical fiber probe with longitudinal holes in the cladding is used to retrieve fluorescent particles by exerting microfluidics forces. Laser induced fluorescent (LIF) is carried out by the fiber probe and an optical setup. When a particle with a previously chosen fluorescence wavelength is identified, a vacuum pump is activated collecting the particle into a hole. Green and red fluorescent polystyrene particles were detected and selectively retrieved.
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| 13. |
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| 14. |
- Etcheverry, Sebastián, et al.
(författare)
-
Microsecond switching of plasmonic nanorods in an all-fiber optofluidic component
- 2017
-
Ingår i: Optica. - : Optical Society of America. - 2334-2536. ; 4:8, s. 864-870
-
Tidskriftsartikel (refereegranskat)abstract
- As information technologies move from electron-to photon-based systems, the need to rapidly modulate light is of paramount importance. Here, we study the evolution of the electric-field-induced alignment of gold nanorods suspended in organic solvents. The experiments were performed using an all-fiber optofluidic device, which enables convenient interaction of light, electric fields, and the nanorod suspension. We demonstrate microsecond nanorod switching times, three orders of magnitude faster than a traditional Freederickcz-based liquid crystal alignment mechanism. We find that the dynamics of the alignment agrees well with the Einstein-Smoluchowski relationship, allowing for the determination of the rotational diffusion coefficient and polarizability anisotropy of the nanorods as well as the effective length of the ligands capping the nanorods. The ability to dynamically control the optical properties of these plasmonic suspensions coupled with the point-to-point delivery of light from the fiber component, as demonstrated in this work, may enable novel ultrafast optical switches, filters, displays, and spatial light modulators.
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| 15. |
- Etcheverry, Sebastian, et al.
(författare)
-
Optical Fiber inertial focusing based micro Flowcytometer
-
Ingår i: Nature Communications. - 2041-1723.
-
Tidskriftsartikel (refereegranskat)abstract
- Flow cytometry is a powerful method for analysis of cells and particles. Fueled by the need for point of care diagnostic applications, a significant effort has been made to miniaturize flow cytometry. However, despite recent advances, current microflow cytometers remain less versatile and much slower than their large-scale counterparts. Here, we present a portable all-silica optofluidic device that integrates particle focusing in flow through cylindrical silica capillaries and light delivery in optical fibers to simultaneously measure fluorescence and scattering from cells and particles at a rate of 2500 particles/s – a throughput comparable to conventional cytometers. Precise 3D cell focusing and ordering is accomplished using extended elasto-inertial focusing (EEF), a key enabler for eliminating the sheath fluid commonly employed in flow cytometry with maintained high throughput. We demonstrate simultaneously two-color fluorescence and scattering measurement of different sized particles and cells. This robust and low-cost optofluidic device, assembled without the need of clean-room facilities, is ideal suited for point of care applications.
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| 16. |
- Etcheverry, Sebastián, et al.
(författare)
-
Optofludics in microstructured fibers combining particle elasto-inertial focusing and fluorescence
- 2016
-
Ingår i: 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO). - Washington, D.C. : IEEE conference proceedings. - 9781943580118
-
Konferensbidrag (refereegranskat)abstract
- Optofluidics is exploited in an all-fiber component to detect and identify through fluorescence particles flowing at high rate and inertially focused in a capillary. The system represents a first step towards an in-fiber flow cytometer.
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| 17. |
- Etcheverry, Sebastián, et al.
(författare)
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Playing cellular Golf in microstructured fibres
- 2015
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Ingår i: Workshop on Specialty Optical Fibers and their Applications, WSOF 2015. - Washington, D.C. : OSA. - 9781943580057
-
Konferensbidrag (refereegranskat)abstract
- We illuminate particles in a solution using fibers with cladding holes. Particles sufficiently near the fiber tip and with the correct optical signature are collected into the holes with good specificity, mimicking cell-collection for diagnostics.
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| 18. |
- Etcheverry, Sebastian, et al.
(författare)
-
Quantum key distribution session with 16-dimensional photonic states
- 2013
-
Ingår i: Scientific Reports. - : Nature Publishing Group. - 2045-2322. ; :3, s. 2316-
-
Tidskriftsartikel (refereegranskat)abstract
- The secure transfer of information is an important problem in modern telecommunications. Quantum key distribution (QKD) provides a solution to this problem by using individual quantum systems to generate correlated bits between remote parties, that can be used to extract a secret key. QKD with D-dimensional quantum channels provides security advantages that grow with increasing D. However, the vast majority of QKD implementations has been restricted to two dimensions. Here we demonstrate the feasibility of using higher dimensions for real-world quantum cryptography by performing, for the first time, a fully automated QKD session based on the BB84 protocol with 16-dimensional quantum states. Information is encoded in the single-photon transverse momentum and the required states are dynamically generated with programmable spatial light modulators. Our setup paves the way for future developments in the field of experimental high-dimensional QKD.
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| 19. |
- Etcheverry, Sebastián, et al.
(författare)
-
Real-time study of shape and thermal fluctuations in the echinocyte transformation of human erythrocytes using defocusing microscopy
- 2012
-
Ingår i: Journal of Biomedical Optics. - 1083-3668 .- 1560-2281. ; 17:10, s. 106013-
-
Tidskriftsartikel (refereegranskat)abstract
- We present a real-time method to measure the amplitude of thermal fluctuations in biological membranes by means of a new treatment of the defocusing microscopy (DM) optical technique. This approach was also applied to study the deformation of human erythrocytes to its echinocyte structure. This was carried out by making three-dimensional shape reconstructions of the cell and measuring the thermal fluctuations of its membrane, as the cell is exposed to the anti-inflammatory drug naproxen and as it recovers its original shape, when it is subsequently cleansed of the drug. The results showed biomechanical changes in the membrane even at low naproxen concentration (0.2 mM). Also, we found that when the cell recovered its original shape, the membrane properties were different compared to the nondrugged initial erythrocyte, indicating that the drug administration-recovery process is not completely reversible.
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| 20. |
- Etcheverry, Sebastián, et al.
(författare)
-
Sub-microsecond switching times using dynamically tunable plasmonic pixels
- 2018
-
Konferensbidrag (refereegranskat)abstract
- Liquid crystal based devices can arbitrarily control the amplitude, phase and polarization of light, enabling disruptive technologies such as flat screen televisions and smart phones. Yet, the Achilles heel of these devices are their slow, millisecond switching speeds, constraining potential applications. Here we develop the concept of a dynamic plasmonic pixel as a novel paradigm for liquid crystal devices using the electric field controlled alignment of gold nanorods. Experiments were performed using an electro-optic fluid fiber device, which enabled convenient interaction of light, electric fields and the nanorod suspension. We studied the evolution of the electric-field induced alignment of gold nanorods and demonstrate microsecond switching times, 3 orders of magnitude faster than a traditional Freederickcz-based liquid crystal alignment mechanism. We find that the dynamics of the alignment agrees well with the Einstein-Smoluchowski relationship. Furthermore, by digitally switching the nanorods between orthogonally aligned states, we show switching frequencies greater than MHz can be achieved. The development of these dynamically tunable plasmonic pixels may lead to ultrafast optical switches, filters, displays and spatial light modulators.
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| 21. |
- Etcheverry, Sebastián, et al.
(författare)
-
Trapping and optical identification of microparticles in a liquid with a functional optical fiber probe
- 2018
-
Ingår i: Conference on Lasers and Electro-Optics OSA Technical Digest (online) (Optical Society of America, 2018), paper AM4P.6. - : Optical Society of America. - 9781557528209
-
Konferensbidrag (refereegranskat)abstract
- A fiber probe traps single micrometer-particles by fluid suction into a hollow microstructure and enables optical identification by the fluorescence light collected in a fiber core. The probe finds applications in life-science and environmental monitoring.
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| 22. |
- Harish, Achar Vasant, et al.
(författare)
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Optofluidic Fiber Component to Separate Micron-Sized Particles using Elasto-Inertial Focusing
- 2020
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Ingår i: Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS. - : Institute of Electrical and Electronics Engineers Inc..
-
Konferensbidrag (refereegranskat)abstract
- Using various fiber capillaries with different diameters and multiple holes we develop an optofluidic component capable of separating micron-sized beads emulating cells and bacteria, exploiting particle focusing in a viscoelastic fluid and analyzed optically.
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| 23. |
- Kumar, Tharagan, et al.
(författare)
-
Lab-in-a-fiber-based integrated particle separation and counting
- 2023
-
Ingår i: Lab on a Chip. - : Royal Society of Chemistry. - 1473-0197 .- 1473-0189. ; 23, s. 2286-
-
Tidskriftsartikel (refereegranskat)abstract
- An all-fiber integrated device capable of separating and counting particles is presented. A sequence of silica fiber capillaries with various diameters and longitudinal cavities are used to fabricate the component for size-based elasto-inertial passive separation of particles followed by detection in an uninterrupted continuous flow. Experimentally, fluorescent particles of 1 μm and 10 μm sizes are mixed in a visco-elastic fluid and fed into the all-fiber separation component. The particles are sheathed by an elasticity enhancer (PEO - polyethylene oxide) to the side walls. Larger 10 μm particles migrate to the center of the silica capillary due to the combined inertial lift force and elastic force, while the smaller 1 μm particles are unaffected, and exit from a side capillary. A separation efficiency of 100% for the 10 μm and 97% for the 1 μm particles is achieved at a total flow rate of 50 μL min−1. To the best of our knowledge, this is the first time effective inertial-based separation has been demonstrated in circular cross-section microchannels. In the following step, the separated 10 μm particles are routed through another all-fiber component for counting and a counting throughput of ∼1400 particles per min is demonstrated. We anticipate the ability to combine high throughput separation and precise 3D control of particle position for ease of counting will aid in the development of advanced microflow cytometers capable of particle separation and quantification for various biomedical applications.
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| 24. |
- Kumar, Tharagan, et al.
(författare)
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Lab-in-a-fiber optofluidic device for separation and detection of micron-sized particles
- 2021
-
Ingår i: MicroTAS 2021 - 25th International Conference on Miniaturized Systems for Chemistry and Life Sciences. - : Chemical and Biological Microsystems Society. ; , s. 699-700
-
Konferensbidrag (refereegranskat)abstract
- An all-fiber component capable of sorting and counting microparticles based on size is presented. A sequence of silica fiber capillaries were used to fabricate the component for separation and detection. The portable, lab-scale “all-fiber” device was fabricated by assembling different silica fiber capillaries and optical fibers in a Vytran glass processing station. We report elasto-inertial microfluidics based particle migration and focusing and demonstrate high separation efficiency between 10 µm (100%) and 1 µm (97%) microparticles. The separated 10 µm particles were further analyzed for counting in the integrated fiberoptics component at a speed of ~1400 particles/min.
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| 25. |
- Kumar, Tharagan, et al.
(författare)
-
Optofluidic Fiber Component for Separation and counting of Micron-Sized Particles
- 2021
-
Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- n all-fiber separation component capable of sorting and counting micron-sized particles based on size is presented. A sequence of silica fiber capillaries with various diameters and longitudinal cavities were used to fabricate the component for separation and detection in an uninterrupted flow. Fluorescence microparticles of 1 μm and 10 μm sizes are mixed in a visco-elastic fluid and infused into the all-fiber separation component. Elasto-inertial forces focus the larger particle to the center of the silica capillary, while the smaller microparticles exit from a side capillary. Analysis of the separated particles at the output showed a separation efficiency of 100% for the 10 μm and 97% for the 1 μm particles. In addition, the counting of the larger particles is demonstrated in the same flow. The separated 10 μm particles are further routed through another all-fiber component for counting. A counting speed of ~1400 particles/min and with the variation in amplitude of 10% is achieved. A combination of separation and counting can be powerful tool may find several applications in biology and medicine, such as separation and analysis of exosomes, bacteria, and blood cell sub-populations.
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| 26. |
- Lopez Grande, I. H., et al.
(författare)
-
Adaptable transmitter for discrete and continuous variable quantum key distribution
- 2021
-
Ingår i: Optics Express. - 1094-4087. ; 29:10, s. 14815-14827
-
Tidskriftsartikel (refereegranskat)abstract
- We present a versatile transmitter capable of performing both discrete variable and continuous variable quantum key distribution protocols (DV-QKD and CV-QKD, respectively). Using this transmitter, we implement a time-bin encoded BB84 DV-QKD protocol over a physical quantum channel of 47 km and a GG02 CV-QKD protocol with true local oscillator over a 10.5 kin channel, achieving secret key rates of 4.1 kbps and 1 Mbps for DV- and CV-QKD, respectively. The reported transmitter scheme is particularly suitable for re-configurable optical networks where the QKD protocol is selected to optimize the performance according to the parameters of the links.
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| 27. |
- Sarmiento, S., et al.
(författare)
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Continuous-variable quantum key distribution over a 15 km multi-core fiber
- 2022
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Ingår i: New Journal of Physics. - : IOP Publishing. - 1367-2630. ; 24:6
-
Tidskriftsartikel (refereegranskat)abstract
- The secure transfer of information is critical to the ever-increasing demands of the digital world. Continuous-variable quantum key distribution (CV-QKD) is a promising technology that can provide high secret key rates over metropolitan areas, using conventional telecom components. In this study, we demonstrate the utilization of CV-QKD over a 15 km multi-core fiber (MCF), in which we take advantage of one core to remotely frequency lock Bob's local oscillator with Alice's transmitter. We also demonstrate the capacity of the MCF to boost the secret key rate by parallelizing CV-QKD across multiple cores. Our results indicate that MCFs are promising for the metropolitan deployment of QKD systems.
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| 28. |
- Sudirman, Azizahalhakim, et al.
(författare)
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A fiber optic system for detection and collection of micrometer-size particles
- 2014
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Ingår i: Optics Express. - 1094-4087. ; 22:18, s. 21480-21487
-
Tidskriftsartikel (refereegranskat)abstract
- An optical fiber containing longitudinal holes adjacent to the core has been used to detect and collect fluorescent particles from a solution. Excitation light was launched through the fiber and fluorescence signal was guided back to a detector system. As a proof of principle, green and red fluorescent polystyrene beads were detected and selectively collected from a water solution containing a mixture of red and green fluorescent beads.
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| 29. |
- Valivarthi, R., et al.
(författare)
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Plug-and-play continuous-variable quantum key distribution for metropolitan networks
- 2020
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Ingår i: Optics Express. - 1094-4087. ; 28:10, s. 14547-14559
-
Tidskriftsartikel (refereegranskat)abstract
- We report a plug-and-play continuous variable quantum key distribution system (CV-QKD) with Gaussian modulated quadratures and a true local oscillator. The proposed configuration avoids the need for frequency locking two narrow line-width lasers. To minimize Rayleigh back-scattering, we utilize two independent fiber strands for the distribution of the laser and the transmission of the quantum signals. We further demonstrate the quantum-classical co-existing capability of our system by injecting high-power classical light in both fibers. A secret key rate up to 0.88 Mb/s is obtained by using two fiber links of 13 km and up to 0.3 Mb/s when adding 4 mW of classical light in the optical fiber used for transmitting the quantum signal. The reported performance indicates that the proposed QKD scheme has the potential to become an effective low-cost solution for metropolitan optical networks.
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| 30. |
- Vasileva, Elena, et al.
(författare)
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Optimization of optical gain in composite materials containing Rh6G dye and gold nanoparticles
- 2015
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Ingår i: Asia Communications and Photonics Conference, ACPC 2015. - Washington, D.C. : OSA. - 9781943580064
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Konferensbidrag (refereegranskat)abstract
- The existence of metal nanoparticles in a dye material can lead not only to quenching or enhancement of dye luminescence, or random lasing action, but also to the change of the fundamental material characteristic as optical gain.
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| 31. |
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