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Intersubband optical absorption in ZnO/MgZnO triple quantum well structures

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Abstract

The linear intersubband optical absorption spectra in MgZnO/ZnO triple quantum wells (TQWs) are theoretically calculated with various geometrical structures and material compositions. Mg composition is found to have remarkable effects on peak position and magnitude of linear optical absorption spectra (OAS). The width of the potential well in which subband 1 is located can also significantly influence the linear OAS, but there is no influence found from the variation of other potential well width and barrier thickness. On the other hand, the effect of electric field transversely applied across MgZnO/ZnO TQWs on the energy of subbands and OAS are analyzed. This study suggests several methods to obtain tunable intersubband optical absorption in MgZnO/ZnO TQWs which can be potentially used as infrared detector devices.

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Acknowledgements

This work is supported by Science and Technology Program of Guangzhou, China (Grant No. 201804010444).

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  1. School of Information Engineering, Guangdong University of Technology, Guangzhou, 510006, People’s Republic of China

    DongFeng Liu

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Liu, D. Intersubband optical absorption in ZnO/MgZnO triple quantum well structures. Appl. Phys. B 128, 74 (2022). https://doi.org/10.1007/s00340-022-07799-7

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