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Optical absorption in lateral transition metal dichalcogenide quantum wells

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  • A. Aliakbarpour

    (Payame Noor University (PNU))

  • M. S. Akhoundi Khezrabad

    (Payame Noor University (PNU))

  • S. Shojaei

    (University of Tabriz
    University of Tabriz)

  • S. A. Hashemizadeh-Aghda

    (Payame Noor University (PNU))

Abstract

In recent years, the construction of lateral heterostructures of two-dimensional (2D) monolayers of transition metal dichalcogenides (TMDC) has been attracting considerable interest due to its numerous applications in electronic and optoelectronic devices. In this work, the optical absorption coefficient of the Lateral Single Quantum Well (LSQW) based on $${MoS}_{2}/{WSe}_{2}$$ MoS 2 / WSe 2 is analyzed theoretically. For this purpose, we rederive the absorption coefficient equation for LSQW and investigate the parameters affecting the absorption coefficient of LSQW such as the type of polarization and incident angle as well as spin–orbit coupling (SOC). Our results show the significant effect of the spin–orbit effect on the maximum value of the absorption coefficient so that by including the SOC, the values ​​of absorption coefficient increases. We surprisingly found that increasing the well width enhances the optical absorption in LSQW. Our findings and predictions might be implemented in new emerged optovalleytronic devices. Graphical abstract (a) Absorption coefficient as a function of the photon energy with various incident angle. (b) Absorption coefficient as a function of the incident angle.

Suggested Citation

  • A. Aliakbarpour & M. S. Akhoundi Khezrabad & S. Shojaei & S. A. Hashemizadeh-Aghda, 2022. "Optical absorption in lateral transition metal dichalcogenide quantum wells," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 95(10), pages 1-9, October.
    • Handle: RePEc:spr:eurphb:v:95:y:2022:i:10:d:10.1140_epjb_s10051-022-00423-9
    DOI: 10.1140/epjb/s10051-022-00423-9
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    References listed on IDEAS

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    1. Ting Cao & Gang Wang & Wenpeng Han & Huiqi Ye & Chuanrui Zhu & Junren Shi & Qian Niu & Pingheng Tan & Enge Wang & Baoli Liu & Ji Feng, 2012. "Valley-selective circular dichroism of monolayer molybdenum disulphide," Nature Communications, Nature, vol. 3(1), pages 1-5, January.
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