Observation of Zone-Folded Acoustic Phonons in Terahertz Quantum Cascade Lasers using Picosecond Ultrasonics

Details Observation of Zone-Folded Acoustic Phonons in Terahertz Quantum Cascade Lasers using Picosecond Ultrasonics Observation of Zone-Folded Acoustic Phonons in Terahertz Quantum Cascade Lasers using Picosecond Ultrasonics

2010-12-06

arxiv.org/abs/1012.1356v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 5 figures

Scientific paper

We have investigated the time-resolved vibrational properties of terahertz
quantum cascade lasers by means of ultra-fast laser spectroscopy. By the
observation of the acoustic folded branches, and by analyzing the involved
phonon modes it is possible to extract accurate structural information of these
devices, which are essential for their design and performance.

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