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arXiv · 2502.09786

Bound states in the continuum in cuprous oxide quantum wells

Angelos Aslanidis·Jörg Main·Patric Rommel·Stefan Scheel·Pavel A. Belov
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Abstract

We propose a realistic semiconductor system containing bound states in the continuum (BICs) which allows for a practical realization. By varying the confinement strength of excitons in cuprous oxide quantum wells, we show that long-lived Rydberg states of the confined electron-hole pairs appear in the continuum background. The accuracy of calculations of the linewidths based on the coupled-channel Schr\"odinger equation with three channels and only few basis states is confirmed by a numerically exact solution employing a B-spline basis and the complex coordinate-rotation method. We argue that finite-sized cuprous oxide crystals, due to their large exciton binding energies, are a convenient platform for experimental identification of BICs.

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Angelos Aslanidis, Jörg Main, Patric Rommel, Stefan Scheel, Pavel A. Belov. 2025-02-13. Bound states in the continuum in cuprous oxide quantum wells. https://doi.org/10.1103/physrevb.111.l121103

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