2D trapezoidal waveguide design for near one terahertz quantum cascade lasers

Adam Ramker; Kaleb McClenathan; Zane Shellenbarger; Brian R. Poole; Natalie B. Kostinski; Fatima Toor

doi:10.1117/12.3028979

1 October 2024 2D trapezoidal waveguide design for near one terahertz quantum cascade lasers

Adam Ramker, Kaleb McClenathan, Zane Shellenbarger, Brian R. Poole, Natalie B. Kostinski, Fatima Toor

Proceedings Volume 13129, Optical Modeling and Performance Predictions XIV; 131290Q (2024) https://doi.org/10.1117/12.3028979
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Conference Poster

Abstract

Waveguide engineering is essential for terahertz (THz) Quantum Cascade Lasers (QCLs) to achieve high power output at approximately1 THz, due in part to confinement of the lowest order Transverse Magnetic (TM) mode. In this work, we report on waveguide engineering of approximately 1 THz QCLs to achieve lower gain threshold by increasing the confinement factor and decreasing the total waveguide loss. Gain threshold is modeled for the common types of THz QCL waveguides, i.e., Semi-Insulating Single Plasmon (SISP) and Metal-Metal (MM) waveguides at approximately 1 THz. A SISP-MM hybrid waveguide design is introduced for the first time, resulting in a lower gain threshold than SISP and MM waveguide designs alone. A SISP-MM hybrid design is presented with over 87% confinement factor and 26.55 cm^-1 optical loss.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Adam Ramker, Kaleb McClenathan, Zane Shellenbarger, Brian R. Poole, Natalie B. Kostinski, and Fatima Toor "2D trapezoidal waveguide design for near one terahertz quantum cascade lasers", Proc. SPIE 13129, Optical Modeling and Performance Predictions XIV, 131290Q (1 October 2024); https://doi.org/10.1117/12.3028979

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