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Optical Engineering

Subwavelength silicon disk whispering-gallery-mode microcavities for size-dependent nanoparticles detection in the mid-infrared
Author(s): Jeffrey Dionne; Harshitha Ashwath; Lyuba Kuznetsova
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Paper Abstract

Three-dimensional finite-element-method numerical simulations are used to investigate a size-dependent sensing technique by observing the effects that a spherical nanoparticle had on the frequency resonances of whispering-gallery modes of a subwavelength silicon microdisk. Results show that the observed spectral shift varies significantly ( 2 to 8 nm) for the TM 1 , 2 optical mode with an attached nanoparticle with radii between 150 and 400 nm. This frequency shift size-dependence makes it possible to identify viruses of different sizes by the resonant frequency change in the transmission spectrum in the mid-infrared.

Paper Details

Date Published: 23 May 2017
PDF: 5 pages
Opt. Eng. 56(5) 057111 doi: 10.1117/1.OE.56.5.057111
Published in: Optical Engineering Volume 56, Issue 5
Show Author Affiliations
Jeffrey Dionne, San Diego State Univ. (United States)
Harshitha Ashwath, San Diego State Univ. (United States)
Lyuba Kuznetsova, San Diego State Univ. (United States)

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