The influence of doping concentration on split-well resonant-phonon terahertz quantum cascade lasers.

Shiran Levy, Nathalie Lander Gower, Silvia Piperno, Sadhvikas J. Addamane, John L. Reno, Asaf Albo

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.

Original languageEnglish
Title of host publication2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024
PublisherIEEE Computer Society
ISBN (Electronic)9798350370324
DOIs
StatePublished - 2024
Event49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024 - Perth, Australia
Duration: 1 Sep 20246 Sep 2024

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz

Conference

Conference49th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2024
Country/TerritoryAustralia
CityPerth
Period1/09/246/09/24

Keywords

  • NEGF
  • THz QCLs
  • doping density
  • e-e scattering

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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