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17 March 2023 Electrically pumped topological quantum cascade lasers with topological protection and polarization control
Qi Jie Wang
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Proceedings Volume PC12430, Quantum Sensing and Nano Electronics and Photonics XIX; PC124301H (2023) https://doi.org/10.1117/12.2647786
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
We report the demonstration of electrically pumped Terahertz quantum cascade lasers based on topologically-protected valley edge states. Unlike previous topological lasers that relied on large-scale features to realize topological protection, we employ a compact valley photonic crystal design analogous to two-dimensional (2D) gapped valleytronic materials. Lasing occurs in a sharp-cornered triangular cavity with whispering gallery propagating modes. In addition, we experimentally demonstrate the electrically pumped topological lasers in a Majorana zero mode which shows a cylindrical vector beam single-mode lasing emission in the Terahertz regime.
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Qi Jie Wang "Electrically pumped topological quantum cascade lasers with topological protection and polarization control", Proc. SPIE PC12430, Quantum Sensing and Nano Electronics and Photonics XIX, PC124301H (17 March 2023); https://doi.org/10.1117/12.2647786
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KEYWORDS
Quantum cascade lasers
Polarization control
Photonic crystals
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