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5 March 2021 High-speed modulation of terahertz quantum cascade lasers by acoustic phonon pulses
Paul Dean, Alex Valavanis, Aniela Dunn, John Cunningham, Anthony Kent
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Proceedings Volume 11705, Novel In-Plane Semiconductor Lasers XX; 117050V (2021) https://doi.org/10.1117/12.2577555
Event: SPIE OPTO, 2021, Online Only
Abstract
The fast modulation of lasers is a fundamental requirement for applications in optical communications, high-resolution spectroscopy and metrology. Here, we report a new mechanism to modulate the emission from a terahertz frequency quantum cascade laser (QCL) device , whereby optically-generated acoustic phonon pulses are used to perturb the QCL bandstructure, enabling fast amplitude modulation that can be controlled using the QCL drive current or strain pulse amplitude. We show that this modulation can be explained using a perturbation theory analysis.
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Paul Dean, Alex Valavanis, Aniela Dunn, John Cunningham, and Anthony Kent "High-speed modulation of terahertz quantum cascade lasers by acoustic phonon pulses", Proc. SPIE 11705, Novel In-Plane Semiconductor Lasers XX, 117050V (5 March 2021); https://doi.org/10.1117/12.2577555
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KEYWORDS
Modulation
Quantum cascade lasers
Acoustics
Phonons
Optical communications
Optical spectroscopy
Picosecond phenomena
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