Room temperature operation of photonic-crystal distributed-feedback quantum cascade lasers with single longitudinal and lateral mode performance

Quan Yong Lu*, Wan Hong Guo, Wei Zhang, Li Jun Wang, Jun Qi Liu, Lu Li, Feng Qi Liu, Zhan Guo Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We demonstrate room temperature operation of photonic-crystal distributed-feedback quantum cascade lasers emitting at 4.7 μm. A rectangular photonic crystal lattice perpendicular to the cleaved facet was defined using holographic lithography. The anticrossing of the index- and Bragg-guided dispersions of rectangular lattice forms the band-edge mode with extended mode volume and reduced group velocity. Utilizing this coupling mechanism, single mode operation with a near-diffractive-limited divergence angle of 12°is obtained for 33 μm wide devices in a temperature range of 85-300 K. The reduced threshold current densities and improved heat dissipation management contribute to the realization of devices' room temperature operation.

Original languageEnglish (US)
Article number051112
JournalApplied Physics Letters
Volume96
Issue number5
DOIs
StatePublished - 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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