TITLE

Quantum cascade lasers with monolithic air-semiconductor Bragg reflectors

AUTHOR(S)
Hvozdara, L.; Lugstein, A.; Finger, N.; Gianordoli, S.; Schrenk, W.; Unterrainer, K.; Bertagnolli, E.; Strasser, G.; Gornik, E.
PUB. DATE
August 2000
SOURCE
Applied Physics Letters;8/28/2000, Vol. 77 Issue 9
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Electrically pumped GaAs/AlGaAs quantum cascade lasers with monolithic one-dimensional photonic-band gap mirrors are presented. The mirrors consist of two, precisely defined grooves trenched across the laser ridge using a focused ion beam. A substantial improvement of the laser performance is achieved due to the increased reflectivity of these mirrors. A decrease of the threshold current by 40% at 150 K is observed. The maximum operation temperature increases from 155 K for an unmodified laser to 170 K for the laser with the modified mirrors, and an increase of the T[sub 0] parameter from 99 to 114 K is found. © 2000 American Institute of Physics.
ACCESSION #
4415163

 

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