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| 2. |
- Abasahl, B., et al.
(författare)
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Towards Low-Power Reconfigurable Photonic ICs Based on MEMS Technology
- 2018
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- With the progress and industrialization of photonic integrated circuits (PIC) in the past few decades, there is a strong urge towards design and prototyping in a fast, low-cost and reliable manner. In electronics, this demand is met through field programmable gate arrays (FPGA). In the Horizon 2020 MORPHIC (MEMS-based zerO-power Reconfigurable Photonic ICs) project, we are developing a reconfigurable PIC platform to address this demand in the field of photonics and to facilitate the path from idea towards realization for PIC designers and manufacturers.
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| 3. |
- Agustsson, J. S., et al.
(författare)
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Electrical resistivity and morphology of ultra thin Pt films grown by dc magnetron sputtering on SiO(2)
- 2008
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Ingår i: Journal of Physics Conference Series. - : IOP Science. - 1742-6596.
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Konferensbidrag (refereegranskat)abstract
- Ultra thin platinum films were grown by dc magnetron sputtering on thermally oxidized Si (100) substrates. The electrical resistance of the films was monitored in-situ during growth. The coalescence thickness was determined for various growth temperatures and found to increase from 1.3 nm for films grown at room temperature to 1.8 nm for films grown at 250 degrees C, while a continuous film was formed at a thickness of 3.9 nm at room temperature and 3.5 nm at 250 degrees C. The electrical resistivity increases with increased growth temperature, as well as the morphological grain size, and the surface roughness, measured with a scanning tunneling microscope (STM).
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| 5. |
- Alvarez, Jesus, et al.
(författare)
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A Real Time Immunoassay in Alumina Membranes
- 2014
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Ingår i: SENSORS, 2014 IEEE. - : IEEE conference proceedings. ; , s. 1760-1763
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Konferensbidrag (refereegranskat)abstract
- To date, photonic biosensing with porous membranes has produced slow responses and long sensing times, due to the narrow (less than 100 nm) closed end pores of the membranes used. Recently, polarimetry was used to demonstrate analyte flow through, and real time biosensing in, free-standing porous alumina membranes. Here, we demonstrate how an improved functionalization technology, has for the first time enabled a real-time immunoassay within a porous membrane with a total assay time below one hour. With the new approach, we show a noise floor for individual biosensing measurements of 3.7 ng/ml (25 pM), and a bulk refractive index detection limit of 5×10-6 RIU, with a standard deviation of less than 5%. The membranes, with their 200 nm pore diameter enabling targeted delivering of analytes to bioreceptors immobilized on the pore walls, therefore provide a route towards rapid and low cost real-time opto-fluidic biosensors for small sample volumes.
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| 6. |
- Álvarez, Jesús, et al.
(författare)
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Real time optical immunosensing with flow-through porous alumina membranes
- 2014
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Ingår i: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 202, s. 834-839
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Tidskriftsartikel (refereegranskat)abstract
- Through the presentation of analytical data from bioassay experiments, measured by polarimetry, we demonstrate for the first time a real time immunoassay within a free standing macroporous alumina membrane. The 200 nm nominal pore diameter of the membrane enables flow-through, thereby providing an ideal fluidic platform for the targeted delivery of analytes to bioreceptors immobilized on the pore walls, enabling fast sensing response times and the use of small sample volumes (<100 μL). For the immunoassay, the pore walls were first coated with the functional copolymer, copoly(DMA-NAS) using a novel coupling process, before immobilization of the allergen protein, β-lactoglobulin, by spotting. The immuno-assay then proceeded with the binding of the primary and secondary antibody cognates, rabbit anti-β-lactoglobulin and anti-rabbit IgG respectively. Through the use of streptavidin coated quantum dots as refractive index signal enhancers, a noise floor for individual measurements of 3.7 ng/mL (25 pM) was obtained, with an overall statistical, or formal assay LOD of 33.7 ng/mL (225 pM), for total assay time below 1 h.
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| 7. |
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| 8. |
- Barrios, Carlos A., et al.
(författare)
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Slot-waveguide biochemical sensor (vol 32, pg 2080, 2007)
- 2008
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Ingår i: Optics Letters. - : OPTICAL SOC AMER. - 0146-9592 .- 1539-4794. ; 33:21, s. 2554-2555
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Tidskriftsartikel (refereegranskat)abstract
- The group index, instead of the effective index, is used to analyze the performance of a Si(3)N(4)-SiO(2) slot-waveguide microring refractive index sensor [Opt. Lett. 32, 3080 (2007)]. Assuming that the slot is fully filled with liquid, excellent agreement is found between experimental results and calculations.
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| 9. |
- Barrios, Carlos, et al.
(författare)
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Integrated Si3N4/SiO2 Slot-Waveguide Microresonators
- 2007
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Konferensbidrag (refereegranskat)abstract
- We demonstrate slot-waveguide microring resonators and Fabry-Perot microcavities on Si3N4/SiO2. Characterization indicates guiding and confinement in the waveguide nanometric-size low-index slot region at O-band (1260-1370nm) wavelengths. We measured propagation losses <20 dB/cm.
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