Controlling the emission of quantum dots embedded in photonic crystal nanocavity by manipulating Q-factor and detuning

Tatsuya Nakamura, Takashi Asano, Kazunobu Kojima, Takanori Kojima, Susumu Noda

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

We investigated the modulation of the Purcell effect by controlling the Q-factor and detuning in a quantum-dot-nanocavity coupled system. The Q-factor and detuning are controlled independently using a nanocavity and a waveguide reflector formed in a two-dimensional photonic crystal (PC) slab, in combination with a newly developed nitrogen adsorption/desorption method that enables local control of the refractive index. For example, we observed that the emission of a quantum dot via a cavity mode was increased by 3.3 times when the Q-factor was changed from 3500 to 6900 while keeping the detuning fixed. The dependence of the Purcell effect on the Q-factor has thus been directly observed.

Original languageEnglish
Article number245309
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number24
DOIs
Publication statusPublished - 2011 Dec 14
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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