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Theoretical study of phase-controlled optical absorption, gain and group index in double-quantum-dot molecule

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Abstract

Through solving the Schrodinger equations in the steady state, the optical absorption, gain and group index of a double-quantum-dot molecule (DQDM) system are investigated theoretically. It is demonstrated that the absorption, gain and group index of two different probe pulses are \(2\pi\)-period phase-dependent. The system optical properties can be engineered by modulating the Rabi frequencies and the field detuning of the two coupling lasers, and the field detuning of the two probe lasers. Particularly, we also can use the relative phase to control the optical properties for two different-frequency probe lasers. Such a system may be useful in designing new optoelectronic devices such as phase grating.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant No. 11447182, 11447172 and 11547007), the Yangtze Fund for Youth Teams of Science and Technology Innovation (Grant No. 2015cqt03), and Innovation Training Program for College Students of Yangtze University.

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Authors and Affiliations

  1. School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou, 434023, China

    Chen Chen, Yaxue Wang, Wenjuan Wang, Shengjia Wang, Kuan Xiahou, Xun Xiao & Chunchao Yu

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  1. Chen Chen
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  2. Yaxue Wang
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  3. Wenjuan Wang
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  4. Shengjia Wang
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  5. Kuan Xiahou
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  6. Xun Xiao
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Correspondence to Xun Xiao or Chunchao Yu.

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Chen, C., Wang, Y., Wang, W. et al. Theoretical study of phase-controlled optical absorption, gain and group index in double-quantum-dot molecule. J Opt 52, 1488–1493 (2023). https://doi.org/10.1007/s12596-022-00964-3

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