Exciton-polariton in WS<sub>2</sub> microcavity in the presence of the optical Stark effect

Mahnoor Shahzadi; Weili Zhang; M. T. Khan

doi:10.3788/COL201917.020014

Chinese Optics Letters, Volume. 17, Issue 2, 020014(2019)

Exciton-polariton in WS₂ microcavity in the presence of the optical Stark effect

Mahnoor Shahzadi¹, Weili Zhang^1、*, and M. T. Khan²

¹School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

²Electrical Engineering Department, University of Lahore, Islamabad Campus 54000, Pakistan

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Figures & Tables(5)

$Exciton energy and dispersion of polaritons for different values of an OS pulse. a, Energy shift of excitons as a function of E2Δ. b, Dispersion of polaritons. c, Shift of the polariton dispersion. d, Changes of the excitonic and photonic fraction. In b–d, Δ=0.2 meV, and E0 is 75, 100, 125, 150 MV, respectively (from down to up or from inside to outside).$

Fig. 1. Exciton energy and dispersion of polaritons for different values of an OS pulse. a, Energy shift of excitons as a function of E2Δ. b, Dispersion of polaritons. c, Shift of the polariton dispersion. d, Changes of the excitonic and photonic fraction. In b–d, Δ=0.2 meV, and E0 is 75, 100, 125, 150 MV, respectively (from down to up or from inside to outside).

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Fig. 2. Difference between UP and LP branches at various values of k, i.e., at k=0,1,2 (a, b, and c, respectively).

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Fig. 3. Dynamic analysis of the Stark effect on the energy shift of the polaritonic field. a, Waveform in the time domain. b, Fast Fourier transform of the waveform. In the calculation, k=0, t0=500, and a=0.5 ps.

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Fig. 4. Polarization degree versus E2Δ (simulation Ein=0.5 is considered).

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Table 1. Specific Symbols and Values

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Table 1. Specific Symbols and Values

Symbol	Parameter	Value
$g_{1, 2}$	Nonlinear parameter	0
$γ_{c}$	Decay rate of the photon	0
$γ_{x}$	Decay rate of the exciton	0
$ω_{c}^{0}$	Cavity mode energy	2 eV
$Ω_{R}$	Rabi frequency	70 meV
$Δ$	Energy detuning	0.2 meV
$m_{c}$	Mass of photon	$10^{- 5} m_{x}$
$m_{x}$	Mass of exciton	$5.11 \times 10^{5} eV \cdot c^{2} \cdot S^{2} / m^{2}$
$E_{g}$	Quasi-particle bandgap	2.3 eV

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Mahnoor Shahzadi, Weili Zhang, M. T. Khan, "Exciton-polariton in WS₂ microcavity in the presence of the optical Stark effect," Chin. Opt. Lett. 17, 020014 (2019)

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Paper Information

Special Issue: EXTRAORDINARY 2D MATERIALS BASED NANOPHOTONICS

Received: Dec. 12, 2018

Accepted: Jan. 10, 2019

Published Online: Feb. 14, 2019

The Author Email: Weili Zhang (wl_zhang@uestc.edu.cn)

DOI:10.3788/COL201917.020014

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology