TY - GEN
T1 - The influence of doping concentration on split-well resonant-phonon terahertz quantum cascade lasers.
AU - Levy, Shiran
AU - Gower, Nathalie Lander
AU - Piperno, Silvia
AU - Addamane, Sadhvikas J.
AU - Reno, John L.
AU - Albo, Asaf
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - This study explores the effect of doping density on the performance of split-well resonant-phonon (SWRP) Terahertz Quantum Cascade Lasers (THz QCLs) through non-equilibrium Green's functions (NEGF) analysis. Experimental research showed that increasing the doping concentration in these designs led to better results compared to the split-well direct-phonon (SWDP) design, which has a larger overlap between its active laser states and the doping profile. We also found that electron-electron (e-e) scattering is a major factor in performance limitation. By identifying key scattering mechanisms, we propose optimization strategies for doping profiles and material quality to enhance operational temperatures. This research offers insights into overcoming current limitations in THz QCLs, setting a foundation for future technological advancements.
AB - This study explores the effect of doping density on the performance of split-well resonant-phonon (SWRP) Terahertz Quantum Cascade Lasers (THz QCLs) through non-equilibrium Green's functions (NEGF) analysis. Experimental research showed that increasing the doping concentration in these designs led to better results compared to the split-well direct-phonon (SWDP) design, which has a larger overlap between its active laser states and the doping profile. We also found that electron-electron (e-e) scattering is a major factor in performance limitation. By identifying key scattering mechanisms, we propose optimization strategies for doping profiles and material quality to enhance operational temperatures. This research offers insights into overcoming current limitations in THz QCLs, setting a foundation for future technological advancements.
KW - doping density
KW - e-e scattering
KW - NEGF
KW - THz QCLs
UR - http://www.scopus.com/inward/record.url?scp=85207238218&partnerID=8YFLogxK
U2 - 10.1109/IRMMW-THz60956.2024.10697810
DO - 10.1109/IRMMW-THz60956.2024.10697810
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AN - SCOPUS:85207238218
T3 - International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
BT - 2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024
PB - IEEE Computer Society
T2 - 49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024
Y2 - 1 September 2024 through 6 September 2024
ER -