Type

Journal Article

Authors

Kangpeng Wang
Jun Wang
Jing Jing Wang
Daniel Bennett
Xiaoyan Zhang
Aidan A. Baker-Murray
Gaozhong Wang
Werner Blau

Subjects

Physics

Topics
semiconductor devices and materials nanotechnology nonlinear optical materials nanostructures mose2 nanoscience materials photonic device electronic optical materials nonlinear optical behaviour

Broadband saturable absorption and exciton-exciton annihilation in MoSe2 composite thin films (2019)

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.
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Full list of authors on original publication

Kangpeng Wang, Jun Wang, Jing Jing Wang, Daniel Bennett, Xiaoyan Zhang, Aidan A. Baker-Murray, Gaozhong Wang, Werner Blau

Experts in our system

1
Kangpeng Wang
Trinity College Dublin
Total Publications: 5
 
2
Jun Wang
Trinity College Dublin
Total Publications: 37
 
3
Xiaoyan Zhang
Trinity College Dublin
Total Publications: 6
 
4
Werner Blau
Trinity College Dublin
Total Publications: 109