Enhanced nonlinear optical limiting in TiS<sub>2</sub> dichalcogenide 2D sheets

Jitesh Kumar; Sreekanth J. Varma; Yang Liu; Katherine Layne; Jingjie Wu; Chenglu Liang; Yusuke Nakanishi; Amir Aliyan; Wei Yang; Pulickel M. Ajayan; Jayan Thomas

doi:10.1117/12.2275631

25 August 2017 Enhanced nonlinear optical limiting in TiS₂ dichalcogenide 2D sheets

Jitesh Kumar; Sreekanth J. Varma; Yang Liu; Katherine Layne; Jingjie Wu; Chenglu Liang; Yusuke Nakanishi; Amir Aliyan; Wei Yang; Pulickel M. Ajayan; Jayan Thomas

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Proceedings Volume 10360, Light Manipulating Organic Materials and Devices IV; 103600A (2017) https://doi.org/10.1117/12.2275631
Event: SPIE Organic Photonics + Electronics, 2017, San Diego, California, United States

Abstract

Two dimensional (2D) graphene and transition metal dichalcogenides are an emerging class of extremely interesting materials showing unique physical properties, such as large third-order optical nonlinearity, offering potential applications in optical limiting. Here we report the optical limiting properties of Titanium disufide (TiS₂), and Graphene sheets measured using open aperture and photo-acoustic z-scan techniques. Our best results were observed in TiS₂ Sheets, yielding an optical limiting of 77% at an irradiance of 0.713 GW/cm²with 2PA and 3PA absorption coefficient to be 80cm/GW and 2000 cm³/GW² respectively.Also, TiS₂ sheets show improved shelf life and stability upon irradiation with higher laser powers. This demonstrates the feasibility of using them as a potential candidate for optical limiting applications.

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Jitesh Kumar, Sreekanth J. Varma, Yang Liu, Katherine Layne, Jingjie Wu, Chenglu Liang, Yusuke Nakanishi, Amir Aliyan, Wei Yang, Pulickel M. Ajayan, Jayan Thomas, "Enhanced nonlinear optical limiting in TiS₂ dichalcogenide 2D sheets", Proc. SPIE 10360, Light Manipulating Organic Materials and Devices IV, 103600A (25 August 2017); doi: 10.1117/12.2275631; https://doi.org/10.1117/12.2275631

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