Systematic search for single mode THz QCL and post-processing frequency tuning

Tudor Olariu; Mattias Beck; Giacomo Scalari; Jérôme Faist

doi:10.1117/12.2578573

5 March 2021 Systematic search for single mode THz QCL and post-processing frequency tuning

Tudor Olariu, Mattias Beck, Giacomo Scalari, Jérôme Faist

Proceedings Volume 11685, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIV; 116851B (2021) https://doi.org/10.1117/12.2578573
Event: SPIE OPTO, 2021, Online Only

Abstract

Frequency red tuning of GHz-level is shown in THz Quantum Cascade Lasers, by post-processing alteration of the device. It involves changing the height difference between the active region and surrounding medium, and reapplying a material of known refractive index with an appropriate thickness according to simulations. Thus the mode effective refractive index is increased, causing the device to lase at a lower frequency. With the correct material and thickness, shifts down to 1 GHz can be observed.

Conference Presentation

Citation Download Citation

Tudor Olariu, Mattias Beck, Giacomo Scalari, and Jérôme Faist "Systematic search for single mode THz QCL and post-processing frequency tuning", Proc. SPIE 11685, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIV, 116851B (5 March 2021); https://doi.org/10.1117/12.2578573

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