Abstract
Mechanical strain can be used to tune the optical properties of monolayer transition metal dichalcogenides (1L-TMDs). Here, up conversion photoluminescence (UPL) from 1L-WSe2 flakes is tuned with biaxial strain induced by cruciform bending and indentation method. It is found that the peak position of UPL is redshifted by around 24 nm as the applied biaxial strain increases from 0% to 0.51%. At the same time, the UPL intensity increases exponentially for the up-conversion energy difference that lies within a broad range between −157 meV to −37 meV. The observed linear and sublinear power dependence of UPL emission in 1L-WSe2 with and without biaxial strain at three different excitation wavelengths of 784 nm, 800 nm, and 820 nm indicates the multiphonon-assisted one-photon up conversion emission process. The results of strain-dependent UPL emission from 1L-TMDs pave a unique path to the advances in photon up conversion applications and optoelectronic devices.
Recommended Citation
S. Roy et al., "Upconversion Photoluminescence Of Monolayer WSe2 With Biaxial Strain Tuning," Optics Express, vol. 32, no. 3, pp. 3308 - 3315, Optica Publishing Group, Jan 2024.
The definitive version is available at https://doi.org/10.1364/OE.506243
Department(s)
Mechanical and Aerospace Engineering
Publication Status
Open Access
International Standard Serial Number (ISSN)
1094-4087
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 Optica Publishing Group, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
29 Jan 2024
PubMed ID
38297555
Comments
Defense Advanced Research Projects Agency, Grant W911NF2110353