Evolution of optical nonlinearity within a graphene/Bi2Te3 heterostructure

Jia Chi Lan, Chan Shan Yang, Chun Hu Chen, Cheng Maw Cheng, Hong Liu*, Chao Kuei Lee

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

A z-scan technique was used to analyse the optical nonlinearity of a graphene/Bi2Te3 heterostructure under pulsed laser excitation at 800 nm. The intensity-dependent transmittance over 10 orders of magnitude indicated that the heterostructure displayed a versatile nonlinear absorption behaviour. The sign change of the nonlinear refractive index n2 at a high optical intensity from the saturable absorption of the Bi2Te3 surface state was investigated. Meanwhile, the relationship between the nonlinear absorption and laser output was discussed and used to interpret the laser behaviour variation with an increase in pump power. Our work provides an understanding of the optical nonlinearity evolution and a scaling guide for quality solid-state lasers.

原文英語
頁(從 - 到)9017-9024
頁數8
期刊Journal of Materials Chemistry C
10
發行號23
DOIs
出版狀態已發佈 - 2022 5月 12

ASJC Scopus subject areas

  • 化學 (全部)
  • 材料化學

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