Bound states in the continuum in cuprous oxide quantum wells
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909536614350848 |
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| author | Aslanidis, Angelos Main, Jörg Rommel, Patric Scheel, Stefan Belov, Pavel A. |
| author_facet | Aslanidis, Angelos Main, Jörg Rommel, Patric Scheel, Stefan Belov, Pavel A. |
| contents | 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 Schrödinger 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2502_09786 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Bound states in the continuum in cuprous oxide quantum wells Aslanidis, Angelos Main, Jörg Rommel, Patric Scheel, Stefan Belov, Pavel A. Mesoscale and Nanoscale Physics Quantum Physics 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 Schrödinger 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. |
| title | Bound states in the continuum in cuprous oxide quantum wells |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2502.09786 |