A widely voltage-tunable quantum cascade laser based on "two-step" coupling

Yu Yao, Kale J. Franz, Xiaojun Wang, Jen Yu Fan, Claire F. Gmachl

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

A novel quantum cascade laser design with "two-step" coupling between the injector and the upper laser state is demonstrated to achieve a widely voltage-tunable laser spectrum. Electroluminescence from this design can be tuned over a range of more than 200 cm-1 with a tuning coefficient of ∼700 cm-1 /V per stage. Lasers based on this design provide a tuning range of ∼100 cm-1 (8.3-9 μm) above threshold with a tuning coefficient of ∼900 cm-1 /V per stage at a constant temperature of 295 K.

Original languageEnglish (US)
Article number021105
JournalApplied Physics Letters
Volume95
Issue number2
DOIs
StatePublished - Jul 24 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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