The University of Southampton
University of Southampton Institutional Repository

Effect of coating few-layer WS2 on the Raman spectra and whispering gallery modes of a microbottle resonator

Effect of coating few-layer WS2 on the Raman spectra and whispering gallery modes of a microbottle resonator
Effect of coating few-layer WS2 on the Raman spectra and whispering gallery modes of a microbottle resonator
Multi-layered tungsten disulfide (WS2) coated silicon/silica (Si/SiO2) substrate and SiO2 micro-bottle resonators (MBRs) have been prepared by van der Waals epitaxy method. Raman spectra of WS2-coated MBR show that the out-of-plane Raman mode is sensitive to the polarization of the excitation laser. The quality factor (Q) values of the whispering gallery modes (WGMs) in the transmission spectrum of an MBR decrease by 2 orders of magnitude on coating with WS2. On coating, a cleaner spectrum is obtained along with a concomitant effect of decrease in the number of lossy modes. Fano resonances as well as Autler-Townes splitting (ATS) was observed for the WGMs in the cleaned transmission spectrum. From the simulations it has been verified that the scattered electric field of the WS2 flakes contributes to the observation of the Fano resonances and ATS in the coated MBR spectra.
2D materials, Fano resonances, Raman spectroscopy, microbottle resonators, whispering gallery modes
2040-8986
Bhattacharya, Shubhayan
d06038bd-c92a-4838-a01d-3ab58eaa715a
Veluthandath, Aneesh Vincent
6a183413-e10f-4374-bc64-a33bf7fd9cfa
Huang, Chung-Che
825f7447-6d02-48f6-b95a-fa33da71f106
Murugan, Ganapathy Senthil
a867686e-0535-46cc-ad85-c2342086b25b
Bisht, Prem B.
42de6f45-9306-42e7-856e-c90cc980305d
Bhattacharya, Shubhayan
d06038bd-c92a-4838-a01d-3ab58eaa715a
Veluthandath, Aneesh Vincent
6a183413-e10f-4374-bc64-a33bf7fd9cfa
Huang, Chung-Che
825f7447-6d02-48f6-b95a-fa33da71f106
Murugan, Ganapathy Senthil
a867686e-0535-46cc-ad85-c2342086b25b
Bisht, Prem B.
42de6f45-9306-42e7-856e-c90cc980305d

Bhattacharya, Shubhayan, Veluthandath, Aneesh Vincent, Huang, Chung-Che, Murugan, Ganapathy Senthil and Bisht, Prem B. (2020) Effect of coating few-layer WS2 on the Raman spectra and whispering gallery modes of a microbottle resonator. Journal of Optics, 22 (10), [105003]. (doi:10.1088/2040-8986/abad50).

Record type: Article

Abstract

Multi-layered tungsten disulfide (WS2) coated silicon/silica (Si/SiO2) substrate and SiO2 micro-bottle resonators (MBRs) have been prepared by van der Waals epitaxy method. Raman spectra of WS2-coated MBR show that the out-of-plane Raman mode is sensitive to the polarization of the excitation laser. The quality factor (Q) values of the whispering gallery modes (WGMs) in the transmission spectrum of an MBR decrease by 2 orders of magnitude on coating with WS2. On coating, a cleaner spectrum is obtained along with a concomitant effect of decrease in the number of lossy modes. Fano resonances as well as Autler-Townes splitting (ATS) was observed for the WGMs in the cleaned transmission spectrum. From the simulations it has been verified that the scattered electric field of the WS2 flakes contributes to the observation of the Fano resonances and ATS in the coated MBR spectra.

Text
Effect of coating few-layer WS2 on the Raman spectra and whispering gallery modes of a microbottle resonator - Version of Record
Available under License Creative Commons Attribution.
Download (2MB)

More information

Accepted/In Press date: 7 August 2020
e-pub ahead of print date: 3 September 2020
Published date: October 2020
Keywords: 2D materials, Fano resonances, Raman spectroscopy, microbottle resonators, whispering gallery modes

Identifiers

Local EPrints ID: 443910
URI: http://eprints.soton.ac.uk/id/eprint/443910
ISSN: 2040-8986
PURE UUID: e484f7b6-0bd1-4fb9-bdcd-6fb6bb02e4b4
ORCID for Aneesh Vincent Veluthandath: ORCID iD orcid.org/0000-0003-4306-6723
ORCID for Chung-Che Huang: ORCID iD orcid.org/0000-0003-3471-2463
ORCID for Ganapathy Senthil Murugan: ORCID iD orcid.org/0000-0002-2733-3273

Catalogue record

Date deposited: 16 Sep 2020 16:35
Last modified: 18 Feb 2021 17:41

Export record

Altmetrics

Contributors

Author: Shubhayan Bhattacharya
Author: Chung-Che Huang ORCID iD
Author: Prem B. Bisht

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×