5 January 2017 Slow terahertz light via resonant tunneling induced transparency in quantum well heterostructures
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Proceedings Volume 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications; 1022603 (2017) https://doi.org/10.1117/12.2262367
Event: International Conference and School on Quantum Electronics "Laser Physics and Applications" - ICSQE 2016, 2016, Sozopol, Bulgaria
Abstract
We present a theoretical and computational investigation of the possibility of achieving slow terahertz light by exploiting the tunneling induced transparency (TIT) effect in suitably engineered quantum well heterostructure devices. We design such a meta-material and show how TIT could lead to large values of the group refractive index, unfortunately at the cost of strong field attenuation due to decoherence. As a suitable alternative, we propose a grating, consisting of a buffer and a quantum cascade amplifier regions, arranged in such a way as to achieve slow light and simultaneously compensate for the large signal losses. Our calculations show that a binary message could be reliably transmitted through this system, with non-critical reduction of the signal to noise ratio, as we achieve a slow-down factor of more than 70.
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Petar Tzenov, Christian Jirauschek, "Slow terahertz light via resonant tunneling induced transparency in quantum well heterostructures", Proc. SPIE 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications, 1022603 (5 January 2017); doi: 10.1117/12.2262367; https://doi.org/10.1117/12.2262367
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