Quantum cascade lasers (QCLs) are powerful testing grounds for the fundamental physical parameters determined by their quantum nature. The associated wealth of unique physical properties makes the QCL a subject of extensive research, especially across the far-infrared, where the electron-phonon relaxation dynamics, the gain mechanisms and the related intrinsic QCL features need to be extensively investigated. Here, we report a complete overview of the frequency-noise power spectral density of a THz QCL, giving an experimental and analytical evaluation of its intrinsic linewidth and a full investigation of the physics beyond it, offering a new perspective of use of ultra-narrow THz QCL sources as a metrological grade tool for a widespread range of photonic applications.

Quantum-limited linewidth in THz quantum cascade lasers

TREDICUCCI, ALESSANDRO;
2013

Abstract

Quantum cascade lasers (QCLs) are powerful testing grounds for the fundamental physical parameters determined by their quantum nature. The associated wealth of unique physical properties makes the QCL a subject of extensive research, especially across the far-infrared, where the electron-phonon relaxation dynamics, the gain mechanisms and the related intrinsic QCL features need to be extensively investigated. Here, we report a complete overview of the frequency-noise power spectral density of a THz QCL, giving an experimental and analytical evaluation of its intrinsic linewidth and a full investigation of the physics beyond it, offering a new perspective of use of ultra-narrow THz QCL sources as a metrological grade tool for a widespread range of photonic applications.
9780819494009
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/579269
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