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Limiting Factors to the Temperature Performance of THz Quantum Cascade Lasers Based on the Resonant-Phonon Depopulation Scheme
2012
IEEE Transactions on Terahertz Science and Technology
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We analyze the temperature performance of five terahertz (THz)-frequency quantum cascade lasers based on a threequantum-well resonant-phonon depopulation design as a function of operating frequency in the 2.3-3.8-THz range. We find evidence that the device performance is limited by the interplay between two factors: 1) optical phonon scattering of thermal electrons, which dominates at shorter wavelengths, and 2) parasitic current, which dominates at longer wavelengths. We present a simple model
doi:10.1109/tthz.2011.2177176
fatcat:lijl2m25vvbdffo3mjnqafaaiq