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Nonlinear Optical Absorption Properties of Sputtered WSe2 Thin-films in the Near-Infrared Spectral Band

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Title Nonlinear Optical Absorption Properties of Sputtered WSe2 Thin-films in the Near-Infrared Spectral Band
 
Creator Surbhi, Km.
Das, Ritwick
 
Subject WSe2 Thin films
Nonlinear optical process
Two-photon absorption
Free-charge carriers
Transition-metal dichalcogenides
 
Description 541-545
We present a detailed investigation on the intensity dependent third-order nonlinear optical (NLO) properties of RFsputtered
WSe2 thin film using ultra short pulses. The investigation employed a single-beam Z-scan technique using nearinfrared
(NIR) ultra short pulses centered at 1030 nm for ascertaining the NLO response. The results reveal a reverse
saturable absorption (RSA) signature, which is primarily due to the contribution from two-photon absorption (TPA). We
explored the impact of high optical fluence on the TPA process and observed the weakening of the nonlinear optical
absorption in WSe2 thin film, which essentially pointed towards a significant contribution of free-carriers as well as bandfilling
effect. This research elucidates the insight of photophysical properties of WSe2 thin films and shows the potential use
as optical limiters.
 
Date 2023-07-03T10:57:09Z
2023-07-03T10:57:09Z
2023-07
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/62242
https://doi.org/10.56042/ijpap.v61i7.102
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJPAP Vol.61(07) [July 2023]