Enhancement of the second harmonic generation from monolayer WS2 coupled with a silica microsphere

doi:10.1088/1674-1056/ac6868

中国物理B ›› 2022, Vol. 31 ›› Issue (10): 104203-104203.doi: 10.1088/1674-1056/ac6868

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Enhancement of the second harmonic generation from monolayer WS₂ coupled with a silica microsphere

Xiao-Zhuo Qi(祁晓卓)^1,2, and Xi-Feng Ren(任希锋)^1,2,†

1. CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
2. CAS Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China

收稿日期:2022-03-01 修回日期:2022-04-11 出版日期:2022-10-16 发布日期:2022-09-16
通讯作者: Xi-Feng Ren E-mail:renxf@ustc.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11774333 and 62061160487) and the Fundamental Research Funds for the Central Universities.

Enhancement of the second harmonic generation from monolayer WS₂ coupled with a silica microsphere

Xiao-Zhuo Qi(祁晓卓)^1,2, and Xi-Feng Ren(任希锋)^1,2,†

1. CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
2. CAS Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China

Received:2022-03-01 Revised:2022-04-11 Online:2022-10-16 Published:2022-09-16
Contact: Xi-Feng Ren E-mail:renxf@ustc.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11774333 and 62061160487) and the Fundamental Research Funds for the Central Universities.

摘要/Abstract

摘要： Monolayer transition metal dichalcogenides (TMDs) are widely used for integrated optical and photoelectric devices. Owing to their broken inversion symmetry, monolayer TMDs have a large second-order optical nonlinearity. However, the optical second-order nonlinear conversion efficiency of monolayer TMDs is still limited by the interaction length. In this work, we theoretically study the second harmonic generation (SHG) from monolayer tungsten sulfide (WS₂) enhanced by a silica microsphere cavity. By tuning the position, size, and crystal orientation of the material, second-order nonlinear coupling can occur between the fundamental pump mode and different second harmonic cavity modes, and we obtain an optimal SHG conversion efficiency with orders of magnitude enhancement. Our work demonstrates that the microsphere cavity can significantly enhance SHG from monolayer 2D materials under flexible conditions.

关键词: integrated optics, frequency conversion

Abstract: Monolayer transition metal dichalcogenides (TMDs) are widely used for integrated optical and photoelectric devices. Owing to their broken inversion symmetry, monolayer TMDs have a large second-order optical nonlinearity. However, the optical second-order nonlinear conversion efficiency of monolayer TMDs is still limited by the interaction length. In this work, we theoretically study the second harmonic generation (SHG) from monolayer tungsten sulfide (WS₂) enhanced by a silica microsphere cavity. By tuning the position, size, and crystal orientation of the material, second-order nonlinear coupling can occur between the fundamental pump mode and different second harmonic cavity modes, and we obtain an optimal SHG conversion efficiency with orders of magnitude enhancement. Our work demonstrates that the microsphere cavity can significantly enhance SHG from monolayer 2D materials under flexible conditions.

Key words: integrated optics, frequency conversion

中图分类号: (Integrated optics)

42.82.-m

42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)

Xiao-Zhuo Qi(祁晓卓), and Xi-Feng Ren(任希锋). Enhancement of the second harmonic generation from monolayer WS₂ coupled with a silica microsphere[J]. 中国物理B, 2022, 31(10): 104203-104203.

Xiao-Zhuo Qi(祁晓卓), and Xi-Feng Ren(任希锋). Enhancement of the second harmonic generation from monolayer WS₂ coupled with a silica microsphere[J]. Chin. Phys. B, 2022, 31(10): 104203-104203.

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Enhancement of the second harmonic generation from monolayer WS₂ coupled with a silica microsphere

Enhancement of the second harmonic generation from monolayer WS₂ coupled with a silica microsphere

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