Electrically pumped photonic crystal distributed feedback quantum cascade lasers

Y. Bai*, S. R. Darvish, S. Slivken, P. Sung, J. Nguyen, A. Evans, W. Zhang, M. Razeghi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

We demonstrate electrically pumped, room temperature, single mode operation of photonic crystal distributed feedback (PCDFB) quantum cascade lasers emitting at λ∼4.75 μm. Ridge waveguides of 100 μm width were fabricated with both PCDFB and Fabry-Ṕrot feedback mechanisms. The Fabry-Ṕrot device has a broad emitting spectrum and a double lobed far-field character. The PCDFB device, as expected, has primarily a single spectral mode and a diffraction limited far field characteristic with a full angular width at half maximum of 2.4°. This accomplishment represents the first step in power scaling of single mode, midinfrared laser diodes operating at room temperature.

Original languageEnglish (US)
Article number141123
JournalApplied Physics Letters
Volume91
Issue number14
DOIs
StatePublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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