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Proceedings Paper

Control of the Purcell effect of quantum dots embedded in photonic crystal nanocavity by manipulating Q-factor
Author(s): T. Nakamura; T. Asano; K. Kojima; T. Kojima; S. Noda
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Paper 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.

Paper Details

Date Published: 16 February 2012
PDF: 11 pages
Proc. SPIE 8269, Photonic and Phononic Properties of Engineered Nanostructures II, 82690G (16 February 2012); doi: 10.1117/12.908142
Show Author Affiliations
T. Nakamura, Kyoto Univ. (Japan)
T. Asano, Kyoto Univ. (Japan)
K. Kojima, Kyoto Univ. (Japan)
T. Kojima, Kyoto Univ. (Japan)
S. Noda, Kyoto Univ. (Japan)

Published in SPIE Proceedings Vol. 8269:
Photonic and Phononic Properties of Engineered Nanostructures II
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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