| 1. |
- 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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| 2. |
- Barrios, C. A., et al.
(författare)
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Reconfiguration of microring resonators by liquid adhesion
- 2008
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Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 93:20
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Tidskriftsartikel (refereegranskat)abstract
- We present a procedure to reconfigure microring resonators based on liquid surface adhesion. Droplets of organic solvents were deposited over Si3N4/SiO2 strip- and slot-waveguide ring resonators, and the transmission spectra were measured several hours after the evaporation of the droplets at room temperature. Our measurements show that the optical properties of the microrings are significantly modified by liquid adhered to the waveguides, persisting even 96 h after bulk evaporation. Liquid-solid interfacial forces slow down liquid evaporation at the nanoscale, enabling permanent photonic configurations. Rewriteability is achieved by removing the adhered liquid with heat.
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| 3. |
- Maire, Guillaume, et al.
(författare)
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High efficiency silicon nitride surface grating couplers
- 2008
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Ingår i: Optics Express. - 1094-4087. ; 16:1, s. 328-333
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Tidskriftsartikel (refereegranskat)abstract
- High efficiency surface grating couplers for silicon nitride waveguides have been designed, fabricated, and characterized. Coupling efficiencies exceeding 60 % are reported at a wavelength of 1.31 mu m, as well as angular and wavelength -3 dB tolerances of 4 and 50 nm, respectively. When the wavelength is increased from 1310 nm to 1450 nm the coupling efficiency progressively decreases but remains above 20 % at 1450 nm. The influence of the duty ratio of the grating has also been investigated: maximum coupling efficiency was obtained at 50 % duty ratio.
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| 4. |
- Vivien, L., et al.
(författare)
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Vertical multiple-slot waveguide ring resonators in silicon nitride
- 2008
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Ingår i: Optics Express. - 1094-4087. ; 16:22, s. 17237-17242
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Tidskriftsartikel (refereegranskat)abstract
- This article describes the first demonstration of ring resonators based on vertical multiple-slot silicon nitride waveguides. The design, fabrication and measurement of multiple-slot waveguide ring resonators with several coupling distances and ring radii (70 mu m, 90 mu m and 110 mu m) have been carried out for TE and TM polarizations at the wavelength of 1.3 mu m. Quality factors of 6,100 and 16,000 have been achieved for TE and TM polarization, respectively.
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