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Proceedings Paper

Scatterer induced Fano resonances in WS2 coated microsphere resonator
Author(s): Shubhayan Bhattacharya; Aneesh V. Veluthandath; C. C. Huang; Ganapathy Senthil Murugan; Prem B. Bisht
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Paper Abstract

We report the effect of coating of tungsten disulphide (WS2) on fiberized silica microsphere resonator. Transmission measurements of the microsphere resonator have been done with the help of a tunable laser source and a tapered fiber. The quality (Q) factors have been measured for bare and WS2 coated microcavities. Results indicate that although there is a decrease of Q-factor from 107 to 105 after coating, it results in a cleaner spectrum. Cleaning of WGM spectra becomes important for applications such as sensing where observing a single mode resonance is essential in estimating the shift precisely. Asymmetric Fano-type profile has been observed in the clean spectrum due to the interaction of WS2 with the uncoated WGMs at 1550 nm.

Paper Details

Date Published: 1 April 2020
PDF: 6 pages
Proc. SPIE 11368, Photonics and Plasmonics at the Mesoscale, 1136804 (1 April 2020); doi: 10.1117/12.2555631
Show Author Affiliations
Shubhayan Bhattacharya, Indian Institute of Technology Madras (India)
Aneesh V. Veluthandath, Indian Institute of Technology Madras (India)
C. C. Huang, Univ. of Southampton (United Kingdom)
Ganapathy Senthil Murugan, Univ. of Southampton (United Kingdom)
Prem B. Bisht, Indian Institute of Technology Madras (India)

Published in SPIE Proceedings Vol. 11368:
Photonics and Plasmonics at the Mesoscale
Sylvain Lecler; Vasily N. Astratov; Igor V. Minin, Editor(s)

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