Identification of Whispering Gallery Mode (WGM) coupled photoluminescence and Raman modes in complex spectra of MoS2 in Polymethyl methacrylate (PMMA) microspheres
Identification of Whispering Gallery Mode (WGM) coupled photoluminescence and Raman modes in complex spectra of MoS2 in Polymethyl methacrylate (PMMA) microspheres
A ripples structure is observed in the photoluminescence (PL) spectra of MoS2 adsorbed on the surface of single polymethyl methacrylate (PMMA) microspheres in contrast to the broad spectra of nanosheets. Theoretical simulations and photonic nanojet technique have been used to identify the ripple structures. Part of these structures has been found to be due to the whispering gallery modes (WGMs) of the microcavity. The Raman modes of MoS2 and PMMA, on the other hand, are identified by the photonic nanojet induced enhancement. This work helps applications in photonics and sensing technique which require clean systems with well characterized spectral lines.
Micro cavities, monolayer MoS, PMMA, Raman modes, Whispering gallery modes
255-259
Veluthandath, Aneesh V.
6a183413-e10f-4374-bc64-a33bf7fd9cfa
Bisht, Prem B.
9e617371-071b-48b1-9f33-2801ea08cace
1 July 2017
Veluthandath, Aneesh V.
6a183413-e10f-4374-bc64-a33bf7fd9cfa
Bisht, Prem B.
9e617371-071b-48b1-9f33-2801ea08cace
Veluthandath, Aneesh V. and Bisht, Prem B.
(2017)
Identification of Whispering Gallery Mode (WGM) coupled photoluminescence and Raman modes in complex spectra of MoS2 in Polymethyl methacrylate (PMMA) microspheres.
Journal of Luminescence, 187, .
(doi:10.1016/j.jlumin.2017.03.031).
Abstract
A ripples structure is observed in the photoluminescence (PL) spectra of MoS2 adsorbed on the surface of single polymethyl methacrylate (PMMA) microspheres in contrast to the broad spectra of nanosheets. Theoretical simulations and photonic nanojet technique have been used to identify the ripple structures. Part of these structures has been found to be due to the whispering gallery modes (WGMs) of the microcavity. The Raman modes of MoS2 and PMMA, on the other hand, are identified by the photonic nanojet induced enhancement. This work helps applications in photonics and sensing technique which require clean systems with well characterized spectral lines.
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Accepted/In Press date: 13 March 2017
e-pub ahead of print date: 18 March 2017
Published date: 1 July 2017
Keywords:
Micro cavities, monolayer MoS, PMMA, Raman modes, Whispering gallery modes
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Local EPrints ID: 444639
URI: http://eprints.soton.ac.uk/id/eprint/444639
ISSN: 0022-2313
PURE UUID: 9ad8c2b4-3749-43e0-97ff-8d8e9c8c0aca
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Date deposited: 28 Oct 2020 17:30
Last modified: 18 Mar 2024 03:56
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Author:
Prem B. Bisht
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