Shahzadi M, Zheng CY, Ahmad S, Wang SS, Zhang WL. Exciton-polariton based WS2 polarization modulator controlled by optical Stark beam. Opto-Electron Adv 5, 200066 (2022). doi: 10.29026/oea.2022.200066
Citation: Shahzadi M, Zheng CY, Ahmad S, Wang SS, Zhang WL. Exciton-polariton based WS2 polarization modulator controlled by optical Stark beam. Opto-Electron Adv 5, 200066 (2022). doi: 10.29026/oea.2022.200066

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Exciton-polariton based WS2 polarization modulator controlled by optical Stark beam

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  • 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.
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