(Peer-Reviewed) Exciton-polariton based WS2 polarization modulator controlled by optical Stark beam
Mahnoor Shahzadi ¹, Chuyuan Zheng 郑楚媛 ¹, Sheraz Ahmad ², Shanshan Wang 王珊珊 ¹, Weili Zhang 张伟利 ¹
¹ School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
中国 成都 电子科技大学信息与通信工程学院
² College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
中国 北京 中国石油大学(北京)石油工程学院
Opto-Electronic Advances, 2022-03-31

The recent era of fast optical manipulation and optical devices owe a lot to exciton-polaritons being lighter in mass, faster in speed and stronger in nonlinearity due to hybrid light-matter characteristics. The room temperature existence of polaritons in two dimensional materials opens up new avenues to the design and analysis of all optical devices and has gained the researchers attention.

Here, spin-selective optical Stark effect is introduced to form a waveguide effect in uniform community of polaritons, and is used to realize polarization modulation of polaritons. The proposed device basically takes advantage of the spin-sensitive properties of optical Stark effect of polaritons inside the WS2 microcavity so as to guide different modes and modulate polarization of polaritons.

It is shown that polaritonic wavepacket of different mode profiles can be generated by changing intensity of the optical Stark beam and the polarization of polaritons can be controlled and changed periodically along the formed waveguide by introduction birefringence that is sensitive to polarization degree of the optical Stark beam.
Exciton-polariton based WS2 polarization modulator controlled by optical Stark beam_1
Exciton-polariton based WS2 polarization modulator controlled by optical Stark beam_2
Exciton-polariton based WS2 polarization modulator controlled by optical Stark beam_3
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