Zero-cell photonic crystal nanocavity laser with quantum dot gain

Masahiro Nomura, Yasutomo Ota, Naoto Kumagai, Satoshi Iwamoto, Yasuhiko Arakawa

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

We demonstrate laser oscillation in a hexagonal-lattice photonic crystal nanocavity using an InGaAs quantum dot gain material by optical pumping at 5 K. The cavity comprises a defect created by shifting several air holes in a two-dimensional photonic crystal slab structure without removing any air holes to achieve both small mode volume and a high cavity quality factor. The measured cavity quality factors and estimated mode volume for the nanocavity are ∼33 000 and 0.004 μm3 [0.23 (λ0 /n)3]. The laser threshold is compared between the zero-cell and L3-type nanocavity lasers, and the zero-cell nanolasers are found to have lower thresholds of about one-third of the L3-type nanolasers. This result suggests that a higher Purcell factor of the zero-cell nanolaser is reflected as a lower laser threshold.

Original languageEnglish
Article number191108
JournalApplied Physics Letters
Volume97
Issue number19
DOIs
Publication statusPublished - 2010 Nov 8
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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