Optical polarization in mono and bilayer MoS 2
Optical anisotropy in monolayer- and bilayer-MoS 2 was investigated by polarization resolved photoluminescence measurements. The photoluminescence of monolayer-MoS 2 is found to be partially polarized at 4.2 K and maintains this polarization characteristic up to room temperature, while the photolu...
| Päätekijät: | , , , , , |
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| Aineistotyyppi: | Journal article |
| Julkaistu: |
Elsevier
2017
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| _version_ | 1826279759991013376 |
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| author | Park, Y Li, N Chan, C Reid, B Taylor, R Im, H |
| author_facet | Park, Y Li, N Chan, C Reid, B Taylor, R Im, H |
| author_sort | Park, Y |
| collection | OXFORD |
| description | Optical anisotropy in monolayer- and bilayer-MoS 2 was investigated by polarization resolved photoluminescence measurements. The photoluminescence of monolayer-MoS 2 is found to be partially polarized at 4.2 K and maintains this polarization characteristic up to room temperature, while the photoluminescence of bilayer-MoS 2 shows no obvious polarization. This polarization anisotropy is due to strain effects at the interface between the MoS 2 layer and the SiO 2 substrate, causing symmetry breaking of the MoS 2 charge distribution. Calculations using density functional theory of the electron density distribution of the monolayer- and bilayer-MoS 2 in the in-plane direction are also presented, giving support to our qualitative analysis. |
| first_indexed | 2024-03-07T00:03:35Z |
| format | Journal article |
| id | oxford-uuid:76cd7b4f-f02d-421c-b5f7-74637c6980a3 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:03:35Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:76cd7b4f-f02d-421c-b5f7-74637c6980a32022-03-26T20:18:44ZOptical polarization in mono and bilayer MoS 2Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:76cd7b4f-f02d-421c-b5f7-74637c6980a3Symplectic Elements at OxfordElsevier2017Park, YLi, NChan, CReid, BTaylor, RIm, HOptical anisotropy in monolayer- and bilayer-MoS 2 was investigated by polarization resolved photoluminescence measurements. The photoluminescence of monolayer-MoS 2 is found to be partially polarized at 4.2 K and maintains this polarization characteristic up to room temperature, while the photoluminescence of bilayer-MoS 2 shows no obvious polarization. This polarization anisotropy is due to strain effects at the interface between the MoS 2 layer and the SiO 2 substrate, causing symmetry breaking of the MoS 2 charge distribution. Calculations using density functional theory of the electron density distribution of the monolayer- and bilayer-MoS 2 in the in-plane direction are also presented, giving support to our qualitative analysis. |
| spellingShingle | Park, Y Li, N Chan, C Reid, B Taylor, R Im, H Optical polarization in mono and bilayer MoS 2 |
| title | Optical polarization in mono and bilayer MoS 2 |
| title_full | Optical polarization in mono and bilayer MoS 2 |
| title_fullStr | Optical polarization in mono and bilayer MoS 2 |
| title_full_unstemmed | Optical polarization in mono and bilayer MoS 2 |
| title_short | Optical polarization in mono and bilayer MoS 2 |
| title_sort | optical polarization in mono and bilayer mos 2 |
| work_keys_str_mv | AT parky opticalpolarizationinmonoandbilayermos2 AT lin opticalpolarizationinmonoandbilayermos2 AT chanc opticalpolarizationinmonoandbilayermos2 AT reidb opticalpolarizationinmonoandbilayermos2 AT taylorr opticalpolarizationinmonoandbilayermos2 AT imh opticalpolarizationinmonoandbilayermos2 |