Two-dimensional broadband distributed-feedback quantum cascade laser arrays

Elvis Mujagić, Clemens Schwarzer, Yu Yao, Jianxin Chen, Claire Gmachl, Gottfried Strasser

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


We present two-dimensional broadband quantum cascade laser arrays based on distributed-feedback (DFB) ring cavity surface emitting lasers. The 16-element arrays exhibit a linear tuning range of 180cm-1 centered at a wavelength of 8.2 μm when operated in pulsed mode at room temperature. The devices show single-mode emission with a side mode suppression ratio of 30 dB. Given by the facetless nature of the single emitters, the spectral dependent threshold current densities and optical power reflect the gain profile of the incorporated material and are not impaired by the diversity of underlying DFB designs.

Original languageEnglish (US)
Article number141101
JournalApplied Physics Letters
Issue number14
StatePublished - Apr 4 2011
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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