Raman scattering excitation spectroscopy of monolayer WS2

Abstract Resonant Raman scattering is investigated in monolayer WS2 at low temperature with the aid of an unconventional technique, i.e., Raman scattering excitation (RSE) spectroscopy. The RSE spectrum is made up by sweeping the excitation energy, when the detection energy is fixed in resonance wit...

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Autores principales:	Maciej R. Molas, Karol Nogajewski, Marek Potemski, Adam Babiński
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2a0140f19ac140699c6de8fe5e16bfc6
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spelling	oai:doaj.org-article:2a0140f19ac140699c6de8fe5e16bfc62021-12-02T12:31:47ZRaman scattering excitation spectroscopy of monolayer WS210.1038/s41598-017-05367-02045-2322https://doaj.org/article/2a0140f19ac140699c6de8fe5e16bfc62017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05367-0https://doaj.org/toc/2045-2322Abstract Resonant Raman scattering is investigated in monolayer WS2 at low temperature with the aid of an unconventional technique, i.e., Raman scattering excitation (RSE) spectroscopy. The RSE spectrum is made up by sweeping the excitation energy, when the detection energy is fixed in resonance with excitonic transitions related to either neutral or charged excitons. We demonstrate that the shape of the RSE spectrum strongly depends on the selected detection energy. The resonance of outgoing light with the neutral exciton leads to an extremely rich RSE spectrum, which displays several Raman scattering features not reported so far, while no clear effect on the associated background photoluminescence is observed. Instead, when the outgoing photons resonate with the negatively charged exciton, a strong enhancement of the related emission occurs. Presented results show that the RSE spectroscopy can be a useful technique to study electron-phonon interactions in thin layers of transition metal dichalcogenides.Maciej R. MolasKarol NogajewskiMarek PotemskiAdam BabińskiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Maciej R. Molas Karol Nogajewski Marek Potemski Adam Babiński Raman scattering excitation spectroscopy of monolayer WS2
description	Abstract Resonant Raman scattering is investigated in monolayer WS2 at low temperature with the aid of an unconventional technique, i.e., Raman scattering excitation (RSE) spectroscopy. The RSE spectrum is made up by sweeping the excitation energy, when the detection energy is fixed in resonance with excitonic transitions related to either neutral or charged excitons. We demonstrate that the shape of the RSE spectrum strongly depends on the selected detection energy. The resonance of outgoing light with the neutral exciton leads to an extremely rich RSE spectrum, which displays several Raman scattering features not reported so far, while no clear effect on the associated background photoluminescence is observed. Instead, when the outgoing photons resonate with the negatively charged exciton, a strong enhancement of the related emission occurs. Presented results show that the RSE spectroscopy can be a useful technique to study electron-phonon interactions in thin layers of transition metal dichalcogenides.
format	article
author	Maciej R. Molas Karol Nogajewski Marek Potemski Adam Babiński
author_facet	Maciej R. Molas Karol Nogajewski Marek Potemski Adam Babiński
author_sort	Maciej R. Molas
title	Raman scattering excitation spectroscopy of monolayer WS2
title_short	Raman scattering excitation spectroscopy of monolayer WS2
title_full	Raman scattering excitation spectroscopy of monolayer WS2
title_fullStr	Raman scattering excitation spectroscopy of monolayer WS2
title_full_unstemmed	Raman scattering excitation spectroscopy of monolayer WS2
title_sort	raman scattering excitation spectroscopy of monolayer ws2
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/2a0140f19ac140699c6de8fe5e16bfc6
work_keys_str_mv	AT maciejrmolas ramanscatteringexcitationspectroscopyofmonolayerws2 AT karolnogajewski ramanscatteringexcitationspectroscopyofmonolayerws2 AT marekpotemski ramanscatteringexcitationspectroscopyofmonolayerws2 AT adambabinski ramanscatteringexcitationspectroscopyofmonolayerws2
_version_	1718394266842038272

Raman scattering excitation spectroscopy of monolayer WS2

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