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

Journals >Opto-Electronic Advances >Volume 5 >Issue 11 >Page 200066 > Article

Opto-Electronic Advances
Vol. 5, Issue 11, 200066 (2022)

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

Mahnoor Shahzadi, Chuyuan Zheng, Sheraz Ahmad, Shanshan Wang, and Weili Zhang^*

Author Affiliations

[in Chinese]

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DOI: 10.29026/oea.2022.200066 Cite this Article

Mahnoor Shahzadi, Chuyuan Zheng, Sheraz Ahmad, Shanshan Wang, Weili Zhang. Exciton-polariton based WS₂ polarization modulator controlled by optical Stark beam[J]. Opto-Electronic Advances, 2022, 5(11): 200066 Copy Citation Text

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Structure of proposed model.The optical Stark beam is added to the cavity and a waveguide generated. The directions used in this paper are set by the coordinate.

Fig. 1. Structure of proposed model.The optical Stark beam is added to the cavity and a waveguide generated. The directions used in this paper are set by the coordinate.

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Two level excitonic states and their strong coupling with cavity photons when the OS beam is added.

Fig. 2. Two level excitonic states and their strong coupling with cavity photons when the OS beam is added.

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$Effective refractive index versus OS shift “ΔExσ+”.$

Fig. 3. Effective refractive index versus OS shift “

Δ E_{x}^{σ^{+}}

”.

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Fig. 4. Mode profile of polariton wavepacket for polarized OS beam when

Δ E_{x}^{σ^{+}}

= 5 meV. (a) Only one mode is supported at

Δ E_{x}^{σ^{+}}

= 5 meV. (b) A full map of the field distribution in the x-y plane at

Δ E_{x}^{σ^{+}}

= 5 meV.

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Fig. 5. Mode profile and value of polarization degree ρ.(a) two modes are supported at

Δ E_{x}^{σ^{+}} = 22

meV and

Δ E_{x}^{σ^{-}} = 0

meV . (b) The full map of the field distribution in the x-yplane at

Δ E_{x}^{σ^{+}} = 22

meV and

Δ E_{x}^{σ^{-}} = 0

meV. (c) The modulation curves of ρ along the x-direction when y = 0 at

Δ E_{x}^{σ^{+}} = 22

meV and

Δ E_{x}^{σ^{-}} = 5

meV. (d) The full map of value

ρ

in the x-y plane at

Δ E_{x}^{σ^{+}} = 22

meV and

Δ E_{x}^{σ^{-}} = 5

meV.

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Fig. 6. Typical modulation curves of ρ along the waveguide (x direction) for y = 0. The black curve corresponds to

Δ E_{x}^{σ^{+}}

= 5 meV and

Δ E_{x}^{σ^{-}}

= 0 meV, the blue curve corresponds to

Δ E_{x}^{σ^{+}}

= 22 meV and

Δ E_{x}^{σ^{-}}

= 5 meV, the red curve corresponds to

Δ E_{x}^{σ^{+}}

= 5 meV and

Δ E_{x}^{σ^{-}}

= 22 meV.

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Mahnoor Shahzadi, Chuyuan Zheng, Sheraz Ahmad, Shanshan Wang, Weili Zhang. Exciton-polariton based WS₂ polarization modulator controlled by optical Stark beam[J]. Opto-Electronic Advances, 2022, 5(11): 200066

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