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Enhanced optical Kerr nonlinearity of MoS2 on silicon waveguides

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Abstract

A quasi-two-dimensional layer of MoS2 was placed on top of a silicon optical waveguide to form a MoS2–silicon hybrid structure. Chirped pulse self-phase modulation measurements were carried out to determine the optical Kerr nonlinearity of the structure. The observed increase in the spectral broadening of the optical pulses in the MoS2–silicon waveguide compared with the silicon waveguides indicated that the third-order nonlinear effect in MoS2 is about 2 orders of magnitude larger than that in silicon. The measurements show that MoS2 has an effective optical Kerr coefficient of about 1.1 × 10?16 m2∕W. This work reveals the potential application of MoS2 to enhance the nonlinearity of hybrid silicon optical devices.

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DOI:10.1364/prj.3.000206

所属栏目:Nonlinear Optics

基金项目:This work was fully funded by Hong Kong Research Grants Council research project nos. GRF416913, N_CUHK405/12, AoE/P-02/12, CUHK1/CRF/12G. The authors would like to thank Qijie Xie for the technical support.

收稿日期:2015-05-29

录用日期:2015-06-29

网络出版日期:2015-08-07

作者单位    点击查看

Linghai Liu:Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China
Ke Xu:Department of Electronic and Information Engineering, Shenzhen Graduate School,Harbin Institute of Technology, Shenzhen, China
Xi Wan:Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China
Jianbin Xu:Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China
Chi Yan Wong:Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China
Hon Ki Tsang:Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China

联系人作者:Chi Yan Wong(cywong@ee.cuhk.edu.hk)

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引用该论文

Linghai Liu, Ke Xu, Xi Wan, Jianbin Xu, Chi Yan Wong, and Hon Ki Tsang, "Enhanced optical Kerr nonlinearity of MoS2 on silicon waveguides," Photonics Research 3(5), 206-209 (2015)

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