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Optical control of charged exciton states in tungsten disulfide

A method is presented for optically preparing WS2 monolayers to luminesce from only the charged exciton (trion) state--completely suppressing the neutral exciton. When isolating the trion state, we observed changes in the Raman A1g intensity and an enhanced feature on the low energy side of the E12g... Full description

Journal Title: arXiv.org Feb 4, 2016
Main Author: Currie, M
Other Authors: Hanbicki, A , Kioseoglou, G , Jonker, B
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: DOI: 10.1063/1.4921472
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recordid: proquest2078186010
title: Optical control of charged exciton states in tungsten disulfide
format: Article
creator:
  • Currie, M
  • Hanbicki, A
  • Kioseoglou, G
  • Jonker, B
subjects:
  • Two Dimensional Materials
  • Optical Control
  • Photoluminescence
  • Tungsten Disulfide
  • Excitons
ispartof: arXiv.org, Feb 4, 2016
description: A method is presented for optically preparing WS2 monolayers to luminesce from only the charged exciton (trion) state--completely suppressing the neutral exciton. When isolating the trion state, we observed changes in the Raman A1g intensity and an enhanced feature on the low energy side of the E12g peak. Photoluminescence and optical reflectivity measurements confirm the existence of the prepared trion state. This technique also prepares intermediate regimes with controlled luminescence amplitudes of the neutral and charged exciton. This effect is reversible by exposing the sample to air, indicating the change is mitigated by surface interactions with the ambient environment. This method provides a tool to modify optical emission energy and to isolate physical processes in this and other two-dimensional materials.
language: eng
source:
identifier: DOI: 10.1063/1.4921472
fulltext: fulltext_linktorsrc
url: Link


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titleOptical control of charged exciton states in tungsten disulfide
creatorCurrie, M ; Hanbicki, A ; Kioseoglou, G ; Jonker, B
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ispartofarXiv.org, Feb 4, 2016
identifierDOI: 10.1063/1.4921472
subjectTwo Dimensional Materials ; Optical Control ; Photoluminescence ; Tungsten Disulfide ; Excitons
descriptionA method is presented for optically preparing WS2 monolayers to luminesce from only the charged exciton (trion) state--completely suppressing the neutral exciton. When isolating the trion state, we observed changes in the Raman A1g intensity and an enhanced feature on the low energy side of the E12g peak. Photoluminescence and optical reflectivity measurements confirm the existence of the prepared trion state. This technique also prepares intermediate regimes with controlled luminescence amplitudes of the neutral and charged exciton. This effect is reversible by exposing the sample to air, indicating the change is mitigated by surface interactions with the ambient environment. This method provides a tool to modify optical emission energy and to isolate physical processes in this and other two-dimensional materials.
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descriptionA method is presented for optically preparing WS2 monolayers to luminesce from only the charged exciton (trion) state--completely suppressing the neutral exciton. When isolating the trion state, we observed changes in the Raman A1g intensity and an enhanced feature on the low energy side of the E12g peak. Photoluminescence and optical reflectivity measurements confirm the existence of the prepared trion state. This technique also prepares intermediate regimes with controlled luminescence amplitudes of the neutral and charged exciton. This effect is reversible by exposing the sample to air, indicating the change is mitigated by surface interactions with the ambient environment. This method provides a tool to modify optical emission energy and to isolate physical processes in this and other two-dimensional materials.
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abstractA method is presented for optically preparing WS2 monolayers to luminesce from only the charged exciton (trion) state--completely suppressing the neutral exciton. When isolating the trion state, we observed changes in the Raman A1g intensity and an enhanced feature on the low energy side of the E12g peak. Photoluminescence and optical reflectivity measurements confirm the existence of the prepared trion state. This technique also prepares intermediate regimes with controlled luminescence amplitudes of the neutral and charged exciton. This effect is reversible by exposing the sample to air, indicating the change is mitigated by surface interactions with the ambient environment. This method provides a tool to modify optical emission energy and to isolate physical processes in this and other two-dimensional materials.
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pubCornell University Library, arXiv.org
doi10.1063/1.4921472
urlhttp://search.proquest.com/docview/2078186010/
volume106
issue20
issn00036951
eissn10773118
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date2015-05-18