Optical read-out scheme based on Grated Waveguide Cantilever cavity resonance for interrogation of cantilever sensor arrays

Prakash, P and Renilkumar, M and Venkatesh, C and Faraone, L and Umama-Membreno, GA and Silva, KKMBD and Keating, A and Martyniuk, M and Dell, JM and Varma, MM and Bhat, N and Pratap, R (2012) Optical read-out scheme based on Grated Waveguide Cantilever cavity resonance for interrogation of cantilever sensor arrays. In: Conference on Optoelectronic and Microelectronic Materials and Devices (COMMAD) , DEC 11-14, 2012 , Univ Melbourne, Sch Phys, Melbourne, AUSTRALIA, pp. 69-70.

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Abstract

The design and analysis of an optical read-out scheme based on a grated waveguide (GWG) resonator for interrogating microcantilever sensor arrays is presented. The optical system consisting of a micro cantilever monolithically integrated in proximity to a grated waveguide (GWG), is realized in silicon optical bench platform. The mathematical analysis of the optical system is performed using a Fabry-Perot interferometer model with a lossy cavity formed between the cantilever and the GWG and an analytical expression is derived for the optical power transmission as a function of the cantilever deflection which corresponds to cavity width variation. The intensity transmission of the optical system for different cantilever deflections estimated using the analytical expression captures the essential features exhibited by a FDTD numerical model.

Item Type:	Conference Proceedings
Series.:	Conference on Optoelectronic and Microelectronic Materials and Devices
Publisher:	IEEE
Additional Information:	Copyright for this article belongs to the IEEE
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	23 Sep 2013 11:52
Last Modified:	23 Sep 2013 12:03
URI:	http://eprints.iisc.ac.in/id/eprint/47108

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