Time of flight measurements of the nanoscale heat transfer dynamic in terahertz quantum cascade lasers

Abstract

Quantum cascade lasers (QCLs) are unipolar semiconductor devices based on the engineering of electronic wavefunctions at the nanoscale level in multiple quantum well structures. Heat extraction from QCLs is difficult because of three main reasons: i) the high electrical power (P); ii) the large device thermal resistance due to the low heat conductivity of… (More)

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