Sensitivity improvement of photonic crystal refractive index sensor using porous silicon nano rods

Mehta, S and Vankalkunti, S and Kachhap, PK and Gautam, PR and Singh, M (2023) Sensitivity improvement of photonic crystal refractive index sensor using porous silicon nano rods. In: Materials Science in Semiconductor Processing, 165 .

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Abstract

This work proposes a photonic crystal refractive-index sensor for detecting volatile organic compounds (VOC). Two sensor designs are analyzed with Y-splitter photonic crystal waveguide using the finite-difference time-domain (FDTD) method. Also, simultaneous monitoring of two different analytes is possible across the arms of the Y-splitter. The porous silicon (p-Si) rods with a porosity of 25% are used to create a variable refractive index sensing region, which induces a relative shift in the resonant wavelength of the traveling mode. The response at the output ports is monitored in terms of transmittance power versus wavelength plot. The numerical simulations confirm ∼195.83 nm/RIU sensitivity and ∼24.482 RIU−1 figure-of-merit in the presence of hazardous alcohols.

Item Type:	Journal Article
Publication:	Materials Science in Semiconductor Processing
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the Elsevier Ltd.
Keywords:	Integrated optics; Optical sensors; Photonic band gap; Photonic crystals; Porous silicon.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	19 Jul 2023 09:35
Last Modified:	19 Jul 2023 09:35
URI:	https://eprints.iisc.ac.in/id/eprint/82508

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