GaAs-based quantum cascade lasers for the 5-6 THz range

Mohammad Shahili; Sadhvikas J. Addamane; Christopher A. Curwen; Jonathan H. Kawamura; Benjamin S. Williams

doi:10.1117/12.3002200

13 March 2024 GaAs-based quantum cascade lasers for the 5-6 THz range

Mohammad Shahili, Sadhvikas J. Addamane, Christopher A. Curwen, Jonathan H. Kawamura, Benjamin S. Williams

Proceedings Volume PC12905, Novel In-Plane Semiconductor Lasers XXIII; PC129050K (2024) https://doi.org/10.1117/12.3002200
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

There have been only few reports of THz QC-lasers operating over 5 THz, and none operating in CW mode. As the laser frequency increases, it approaches the Reststrahlen band (8-9 THz in GaAs) which increases the optical losses and degrades the gain. Here, we discuss design strategies to improve operating temperature for THz QCLs targeting 5.3-5.6 THz. These strategies are investigated numerically using a Non-equilibrium Green’s Function solver. We demonstrate a metal-metal waveguide emitting in 4.76 – 6.03 THz with pulsed and CW operating temperature of 117 K and 68 K, respectively, and modes up to 5.71 THz in CW mode.

Conference Presentation

Citation Download Citation

Mohammad Shahili, Sadhvikas J. Addamane, Christopher A. Curwen, Jonathan H. Kawamura, and Benjamin S. Williams "GaAs-based quantum cascade lasers for the 5-6 THz range", Proc. SPIE PC12905, Novel In-Plane Semiconductor Lasers XXIII, PC129050K (13 March 2024); https://doi.org/10.1117/12.3002200

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