Microwave determination of electron-hole recombination dynamics from spontaneous to stimulated emission in a quantum-well microcavity laser

C. H. Wu, H. W. Then, M. Feng, N. Holonyak

Research output: Contribution to journalArticle

Abstract

By studying the optical microwave frequency response of a microcavity quantum-well vertical cavity surface-emitting laser (VCSEL) in the transition, over a low (a spread-out) mode density, from spontaneous to coherent operation, we resolve the dynamics (spontaneous to stimulated) of electron-hole recombination and reveal the existence of "fast" spontaneous recombination (τBspon <159 ps) in a carrier population generally characterized by a large average lifetime of ∼1 ns (Δn/ τav =Δ n1 / τfast + (Δn-Δ n1) / τslow, τfast < τslow). The measured average spontaneous lifetime is not a constant but is altered by the device size, geometry, and boundary conditions (e. g., cavity and current input-output boundary conditions).

Original languageEnglish (US)
Article number131108
JournalApplied Physics Letters
Volume96
Issue number13
DOIs
StatePublished - Apr 12 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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