Design guidelines for optical resonator biochemical sensors
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Kimerling_Design guidelines.pdf
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Author(s)
Sun, Xiaochen
Hu, Juejun
Kimerling, Lionel C
Agarwal, Anuradha
Date Issued
April 2009
Journal
Journal of the Optical Society of America. B, Optical physics
Publisher
Optical Society of America
Citation
Juejun Hu, Xiaochen Sun, Anu Agarwal, and Lionel C. Kimerling, "Design guidelines for optical resonator biochemical sensors," J. Opt. Soc. Am. B 26, 1032-1041 (2009)
http://www.opticsinfobase.org/abstract.cfm?URI=josab-26-5-1032
Version
Author's final manuscript
Abstract
In this paper, we propose a design tool for dielectric optical resonator-based biochemical refractometry sensors. Analogous to the widely accepted photodetector figure of merit, the detectivity D*, we introduce a new sensor system figure of merit, the time-normalized sensitivity S*, to permit quantitative, cross-technology-platform comparison between resonator sensors with distinctive device designs and interrogation configurations. The functional dependence of S* on device parameters, such as resonant cavity quality factor (Q), extinction ratio, system noise, and light source spectral bandwidth, is evaluated by using a Lorentzian peak fitting algorithm and Monte
Carlo simulations to provide theoretical insights and useful design guidelines for optical resonator sensors. Importantly, we find that S* critically depends on the cavity Q factor, and we develop a method of optimizing sensor resolution and sensitivity to noise as a function of cavity Q factor. Finally, we compare the simulation predictions of sensor wavelength resolution with experimental results obtained in Ge[superscript 17]Sb[superscript 12]S[superscript 71] resonators, and good agreement is confirmed.
MIT Department
Massachusetts Institute of Technology. Materials Processing Center
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Microphotonics Center
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DOI of Published Version
https://doi.org/10.1364/JOSAB.26.001032
