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Optical absorption coefficients dependence on well parameter of a coupled quantum well

  • Regular Article – Quantum Optics
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Abstract

The influence of the tunable well parameters on the optical absorption coefficients is theoretically studied in a coupled quantum well structure. It is shown that the transition matrix elements and the energy level differences will depend on the well parameters, which further induces the nonlinear absorption coefficients greatly enhancing. Importantly, the total absorption coefficients greatly increase because the inversion symmetry of the coupled quantum well was broken by adjusting well parameters. Moreover, with the incident laser intensity increasing, the total absorption coefficients will gradually decrease, finally resulting in the bleaching effect.

Graphical abstract

(a) The relationship between linear optical absorption coefficient and quantum well parameter U1, (b) the relationship between nonlinear optical absorption coefficient and quantum well parameter U1, (c) the relationship between total optical absorption coefficient and quantum well parameter U1, (d) the relationship between total optical absorption coefficient and quantum well parameters U1 and WL.

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Data availability statement

This manuscript has no associated data, or the data will not be deposited. [Authors’ comment: All data included in this manuscript are available upon request by contacting with the corresponding author.]

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Acknowledgements

The work is supported by National Natural Science Foundation of China (Grants Nos. 12174161, 61775087 and 12074398).

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Authors and Affiliations

  1. School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, 221116, China

    Yi Zhang & Chaojin Zhang

  2. Department of Physics, College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China

    Bin Chen

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  1. Yi Zhang
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  2. Chaojin Zhang
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  3. Bin Chen
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All authors contributed equally to the paper.

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Correspondence to Chaojin Zhang or Bin Chen.

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Zhang, Y., Zhang, C. & Chen, B. Optical absorption coefficients dependence on well parameter of a coupled quantum well. Eur. Phys. J. D 75, 311 (2021). https://doi.org/10.1140/epjd/s10053-021-00319-w

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