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

Axel Bruchhausen; Mike Hettich; James Lloyd-Hughes; Milan Fischer; Mattias Beck; Giacomo Scalari; Jérôme Faist; Thomas Dekorsy

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

Mesoscale and Nanoscale Physics 2010-12-08 v1 Optics

Authors: Axel Bruchhausen , Mike Hettich , James Lloyd-Hughes , Milan Fischer , Mattias Beck , Giacomo Scalari , Jérôme Faist , Thomas Dekorsy

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Abstract

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.

Keywords

terahertz quantum cascade laser picosecond ultrasonics folded acoustic phonons time-resolved spectroscopy ultrafast laser spectroscopy phonon modes structural characterization

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@article{arxiv.1012.1356,
  title  = {Observation of Zone-Folded Acoustic Phonons in Terahertz Quantum Cascade Lasers using Picosecond Ultrasonics},
  author = {Axel Bruchhausen and Mike Hettich and James Lloyd-Hughes and Milan Fischer and Mattias Beck and Giacomo Scalari and Jérôme Faist and Thomas Dekorsy},
  journal= {arXiv preprint arXiv:1012.1356},
  year   = {2010}
}

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8 pages, 5 figures

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

Abstract

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