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| 3. |
- Aparicio, Francisco, et al.
(författare)
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Incorporation of luminescent nanometric films in photonic crystals and devices for the development of photonic sensors
- 2010
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Konferensbidrag (refereegranskat)abstract
- Dye molecules embedded in different matrices in the form of thin films are the basis of specific materials used for laser cavities, optical filters, optical gas sensors, etc. In the present communication we discuss a new methodology based on the remote microwave plasma assisted deposition of dye containing thin films that circumvent the above mentioned problems. It permits a tailored synthesis of optically active nanometric thin films containing dye molecules which are active as fluorescence emitters (i.e., coloured and fluorescent films). The principle of this new procedure is the partial polymerization of dye molecules that are evaporated over a substrate while exposed to a remote microwave Ar plasma. As a result of this process a polymeric thin film is produced in one step where some dye molecules keep intact their optical activity (although eventually, their optical response can be slightly modified by matrix effects). This methodology has been recently used for the deposition of novel plasma nanocomposites containing non-aggregated laser dyes to maximize the fluorescent emission of the materials and for the fabrication of optical NO2 sensing nanocomposites. To illustrate the possibilities of the technique we present here results for different fluorescent dye molecules, as perylene dyes, and several xanthene and oxazine derivative cationic dyes which are typically used as gain media in tuneable laser dyes. The luminescent, optical and sensing properties of these dye containing nanocomposites will be presented. These active optical layers are being developed for the fabrication of photonic sensor devices, optical filters and photonic chips (PHODYE EU Project). This is due to the full compatibility of the synthetic methodology with the present integrated microelectronic and optoelectronic technology. The possibilities for the fabrication of photonic devices integrating these active optical layers will be demonstrated. Especial attention will be paid to recent results about the incorporation of the luminescent films in photonic crystals and about the conformal growth of luminescent planar defects within artificial opals.
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- Aparicio, Francisco J., et al.
(författare)
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Dye-based photonic sensing systems
- 2016
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Ingår i: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 228, s. 649-657
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Tidskriftsartikel (refereegranskat)abstract
- We report on dye-based photonic sensing systems which are fabricated and packaged at wafer scale. For the first time luminescent organic nanocomposite thin-films deposited by plasma technology are integrated in photonic sensing systems as active sensing elements. The realized dye-based photonic sensors include an environmental NO2 sensor and a sunlight ultraviolet light (UV) A+B sensor. The luminescent signal from the nanocomposite thin-films responds to changes in the environment and is selectively filtered by a photonic structure consisting of a Fabry-Perot cavity. The sensors are fabricated and packaged at wafer-scale, which makes the technology viable for volume manufacturing. Prototype photonic sensor systems have been tested in real-world scenarios. (C) 2016 Elsevier B.V. All rights reserved.
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| 5. |
- Aparicio, Francisco J., et al.
(författare)
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Transparent Nanometric Organic Luminescent Films as UV-Active Components in Photonic Structures
- 2011
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Ingår i: Advanced Materials. - : Wiley. - 0935-9648 .- 1521-4095. ; 23:6, s. 761-765
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Tidskriftsartikel (refereegranskat)abstract
- A new kind of visible-blind organic thin-film material, consisting of a polymeric matrix with a high concentration of embedded 3-hydroxyflavone (3HF) dye molecules, that absorbs UV light and emits green light is presented. The thin films can be grown on sensitive substrates, including flexible polymers and paper. Their suitability as photonic active components in photonic devices is demonstrated.
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- Barrios, Carlos Angulo, et al.
(författare)
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Demonstration of slot-waveguide structures on silicon nitride / silicon oxide platform
- 2007
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Ingår i: Optics Express. - 1094-4087. ; 15:11, s. 6846-6856
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Tidskriftsartikel (refereegranskat)abstract
- We report on the first demonstration of guiding light in vertical slot-waveguides on silicon nitride/silicon oxide material system. Integrated ring resonators and Fabry-Perot cavities have been fabricated and characterized in order to determine optical features of the slot-waveguides. Group index behavior evidences guiding and confinement in the low-index slot region at O-band (1260-1370nm) telecommunication wavelengths. Propagation losses of < 20 dB/cm have been measured for the transverse-electric mode of the slot-waveguides.
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| 8. |
- Barrios, Carlos Angulo, et al.
(författare)
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Label-free optical biosensing with slot-waveguides
- 2008
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Ingår i: Optics Letters. - 0146-9592 .- 1539-4794. ; 33:7, s. 708-710
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Tidskriftsartikel (refereegranskat)abstract
- We demonstrate label-free molecule detection by using an integrated biosensor based on a Si3N4/SiO2 Slot-waveguide microring resonator. Bovine serum albumin (BSA) and anti-BSA molecular binding events on the sensor surface are monitored through the measurement of resonant wavelength shifts with varying biomolecule concentrations. The biosensor exhibited sensitivities of 1.8 and 3.2 nm/(ng/mm(2)) for the detection of anti-BSA and BSA, respectively. The estimated detection limits are 28 and 16 pg/mm(2) for anti-BSA and BSA, respectively, limited by wavelength resolution.
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| 9. |
- Barrios, Carlos Angulo, et al.
(författare)
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Slot-waveguide biochemical sensor
- 2007
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Ingår i: Optics Letters. - 0146-9592 .- 1539-4794. ; 32:21, s. 3080-3082
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Tidskriftsartikel (refereegranskat)abstract
- We report an experimental demonstration of an integrated biochemical sensor based on a slot-waveguidemicroring resonator. The microresonator is fabricated on a Si3N4-SiO2 platform and operates at a wavelength of 1.3 mu m. The transmission spectrum of the sensor is measured with different ambient refractive indices ranging from n = 1. 33 to 1.42. A linear shift of the resonant wavelength with increasing ambient refractive index of 212 nm/refractive index units (RIU) is observed. The sensor detects a minimal refractive index variation of 2 X 10(-4) RIU.
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| 10. |
- 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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