Broadband saturable absorption and exciton-exciton annihilation in MoSe2 composite thin films
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Journal ArticleDate:
2019Author:
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Wang, G., Baker-Murray, A.A., Zhang, X., Bennett, D., Wang, J.J., Wang, J., Wang, K., & Blau, W. Broadband saturable absorption and exciton-exciton annihilation in MoSe2 composite thin films, Optical Materials Express, 9, 2, 2019, 483 - 496Download Item:
Abstract:
Polyvinyl alcohol (PVA) was utilized as a matrix to host two-dimensional (2D)
liquid-phase-exfoliated MoSe2 nanosheets. These 2D MoSe2/PVA composite thin films were
experimentally proven to be preferable for efficient nonlinear optical devices. Our nonlinear
optical study shows that these composite thin films possess strong saturable absorption (SA)
over a wide wavelength range from 400 nm to 800 nm under the irradiation of femtosecond
and nanosecond lasers. The SA property of our films was measured for various laser pulse
durations, wavelength and linear absorption. Moreover, employing pump-probe, excitonexciton
annihilation was experimentally observed and studied at 800 nm. Our research gives
clear insight into the photophysical properties of MoSe2/PVA thin films and shows the
material’s potential as a photonic device.
URI:
https://www.osapublishing.org/ome/abstract.cfm?uri=ome-9-2-483http://hdl.handle.net/2262/89532
Sponsor
Grant Number
Science Foundation Ireland (SFI)
17/TIDA/5135
Author's Homepage:
http://people.tcd.ie/wblauDescription:
PUBLISHED
Author: Blau, Werner; Wang, Gaozhong; Baker-Murray, Aidan A.; Zhang, Xiaoyan; Bennett, Daniel; Wang, Jing Jing; Wang, Jun; Wang, Kangpeng
Sponsor:
Science Foundation Ireland (SFI)Type of material:
Journal ArticleURI:
https://www.osapublishing.org/ome/abstract.cfm?uri=ome-9-2-483http://hdl.handle.net/2262/89532
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Series/Report no:
Optical Materials Express;9;
2;
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Full text availableSubject (TCD):
Nanoscience & Materials , Electronic/Optical Materials , NANOSTRUCTURES , Nanotechnology , SEMICONDUCTOR DEVICES AND MATERIALSISSN:
2159-3930Metadata
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