Scatterer induced Fano resonances in WS2 coated microsphere resonator

Shubhayan Bhattacharya; Aneesh V. Veluthandath; C. C. Huang; Ganapathy Senthil Murugan; Prem B. Bisht

doi:10.1117/12.2555631

1 April 2020 Scatterer induced Fano resonances in WS₂ coated microsphere resonator

Shubhayan Bhattacharya, Aneesh V. Veluthandath, C. C. Huang, Ganapathy Senthil Murugan, Prem B. Bisht

Proceedings Volume 11368, Photonics and Plasmonics at the Mesoscale; 1136804 (2020) https://doi.org/10.1117/12.2555631
Event: SPIE Photonics Europe, 2020, Online Only

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.

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Citation Download Citation

Shubhayan Bhattacharya, Aneesh V. Veluthandath, C. C. Huang, Ganapathy Senthil Murugan, and Prem B. Bisht "Scatterer induced Fano resonances in WS₂ coated microsphere resonator", Proc. SPIE 11368, Photonics and Plasmonics at the Mesoscale, 1136804 (1 April 2020); https://doi.org/10.1117/12.2555631

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