Slow terahertz light via resonant tunneling induced transparency in quantum well heterostructures

Petar Tzenov; Christian Jirauschek

doi:10.1117/12.2262367

5 January 2017 Slow terahertz light via resonant tunneling induced transparency in quantum well heterostructures

Petar Tzenov, Christian Jirauschek

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.

Citation Download Citation

Petar Tzenov and 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); https://doi.org/10.1117/12.2262367

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