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A Study on the Design of Integrated-Optic Biosensor based on the Power Coupling of Two Modes utilizing Si<inf>3</inf>N<inf>4</inf>Rib-Optical Waveguides
- Authors
- Jung, H. S.; H.S.
- Issue Date
- 2020
- Publisher
- IEEE Computer Society
- Citation
- Proceedings of the International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD, v.2020-September, pp.91 - 92
- Journal Title
- Proceedings of the International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD
- Volume
- 2020-September
- Start Page
- 91
- End Page
- 92
- ISSN
- 2158-3234
- Abstract
- We proposed an integrated-optical biosensor configuration that operates at a wavelength of 0.63 μm based on the evanescent-wave and lateral two-mode power coupling of Si3N4 rib-optical waveguides formed on a Si/SiO2/Si3N4/SiO2 multilayer thin films. The coupling between the two propagating modes in the sensing region produces a periodically repeated optical power exchange along the propagation. The light power was steered from one output channel to the other caused by the change of the cladding layer (bio-material) refractive index, which affect the effective refractive index (phase-shift) of two modes through evanescent-waves. The sensitivity 1223 [au/RIU] was evaluated for the two-mode region of the width and length of 4 μm and 3841.46 μm, corresponding to the refractive index range 1.36-1.43. © 2020 IEEE.
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