Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3687913
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- EPSRC [EP/J017671/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J017671/1] Funding Source: researchfish
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We report on the experimental observation of non-equilibrium longitudinal (LO) and interface transverse-like (IF-TO) optical phonons populations associated with electron transport in resonant-phonon THz quantum-cascade lasers. The measured LO-phonon occupation numbers are in excellent agreement with the result of Monte Carlo simulations at a phonon in-plane wave number q = 4.2 x 10(+4) cm(-1), and they remain about 40% larger than the IF-TO ones. (C) 2012 American Institute of Physics. [doi:10.1063/1.3687913]
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