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Synchrotron infrared transmission spectroscopy of a quantum cascade laser correlated to gain models

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7 Author(s)
Friedli, Peter ; Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland ; Sigg, Hans ; Wittmann, Andreas ; Terazzi, Romain
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Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.4774319 

We measure the broadband optical gain and absorption spectra between 0.1 and 0.7 eV in a two-phonon resonance design quantum cascade laser, with the infrared beam of a synchrotron light source, and correlate them to established simulation models, based on the density matrix formalism, and on the non-equilibrium Green's function theory. We show that accounting for the distribution of carriers in momentum space improves the description of the high-energy absorption from the excited states located close to the active wells and results in an accurate prediction of the gain.

Published in:

Applied Physics Letters  (Volume:102 ,  Issue: 1 )

Date of Publication:

Jan 2013

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