MoS2 quantum dots synthesized via solvothermal method as stable optical limiters

Sugandh Sirohi; Shruti Narayanan; Prem B. Bisht

doi:10.1117/12.3009178

20 June 2024 MoS₂ quantum dots synthesized via solvothermal method as stable optical limiters

Sugandh Sirohi, Shruti Narayanan, Prem B. Bisht

Proceedings Volume 13004, Nonlinear Optics and its Applications 2024; 130040O (2024) https://doi.org/10.1117/12.3009178
Event: SPIE Photonics Europe, 2024, Strasbourg, France

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Abstract

Molybdenum disulfide (MoS₂) dots have potential applications as optical limiter and beam modulators. In this work, MoS₂ quantum dots (QDs) prepared via the solvothermal method are studied for their broadband nonlinear optical (NLO) response. The as-prepared dots are few layers thick with lateral size distribution of 2-8 nm. The photoluminescence spectra show dependence on incident pump wavelength. Tunable femtosecond laser based z-scan technique shows reverse-saturable absorption and self-defocusing behavior. The direct bandgap in visible region achieved via quantum confinement effect enhances the NLO response of QDs. The mechanisms of two photon absorption along with thermal nonlinearity have been found to be operating in the system.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Sugandh Sirohi, Shruti Narayanan, and Prem B. Bisht "MoS₂ quantum dots synthesized via solvothermal method as stable optical limiters", Proc. SPIE 13004, Nonlinear Optics and its Applications 2024, 130040O (20 June 2024); https://doi.org/10.1117/12.3009178

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