Angular emission characteristics of quantum cascade spiral microlasers

Martina Hentschel, Tae Yoon Kwon, Mikhail A. Belkin, Ross Audet, Federico Capasso

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


We perform ray and wave simulations of passive and active spiral-shaped optical microcavities, comparing our results to experimental data obtained with mid-infrared quantum cascade spiral microlasers. Focusing on the angular emission characteristics, we find that both ray and wave simulations are consistent with the experimental data, showing richly-featured, multidirectional far-field emission patterns in the case of uniform pumping and TM-polarized light. Active cavity simulations using the Schrödinger-Bloch model indicate that selective pumping of the quantum cascade spiral microlasers near the resonator boundary will yield unidirectional laser emission.

Original languageEnglish
Pages (from-to)10335-10343
Number of pages9
JournalOptics Express
Issue number12
StatePublished - 8 Jun 2009
Externally publishedYes


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