Control of the Purcell effect of quantum dots embedded in photonic crystal nanocavity by manipulating Q-factor

T. Nakamura, T. Asano, K. Kojima, T. Kojima, S. Noda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Modulation of the Purcell effect by controlling both the Q-factor and detuning in a quantum-dot-nanocavity coupled system was investigated. The Q-factor and detunings are controlled independently by using a nanocavity, a waveguide and a reflector formed in a two-dimensional photonic crystal slab, in combination with a newly developed nitrogen adsorption/desorption technique that enables local control of the refractive index. We investigated analytically and experimentally how the density of states of cavity mode is modulated, and we experimentally clarified how the emission of a quantum dot on resonance with a cavity is modulated. 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 3,500 to 6,900 while keeping the detuning fixed. The dependence of the Purcell effect on the Q-factor was directly observed.

Original languageEnglish
Title of host publicationPhotonic and Phononic Properties of Engineered Nanostructures II
DOIs
Publication statusPublished - 2012
Externally publishedYes
EventPhotonic and Phononic Properties of Engineered Nanostructures II - San Francisco, CA, United States
Duration: 2012 Jan 232012 Jan 26

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8269
ISSN (Print)0277-786X

Conference

ConferencePhotonic and Phononic Properties of Engineered Nanostructures II
Country/TerritoryUnited States
CitySan Francisco, CA
Period12/1/2312/1/26

Keywords

  • Cavity-QED
  • Nanocavity
  • Photonic crystal
  • Purcell effect
  • Quantum dot

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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