Open AccessNanowire coupling to photonic crystal nanocavities for single photon sources
Author(s) -
Christian Grillet,
Christelle Monat,
Cameron L. C. Smith,
Benjamin J. Eggleton,
David Moss,
Simon Frédérick,
Dan Dalacu,
Philip J. Poole,
J. Lapointe,
G. C. Aers,
Robin L. Williams
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.001267
Subject(s) - photonic crystal , nanowire , quantum dot , single photon source , photon , coupling (piping) , optoelectronics , q factor , resonance (particle physics) , optics , materials science , photonics , spontaneous emission , purcell effect , cavity quantum electrodynamics , wavelength , nanophotonics , physics , quantum , laser , resonator , atomic physics , quantum mechanics , open quantum system , metallurgy
We demonstrate highly efficient evanescent coupling via a silica loop-nanowire, to ultra-small (0.5 (lambda/n)(3) ), InAs/InP quantum dot photonic crystal cavities, specifically designed for single photon source applications. This coupling technique enables the tuning of both the Q-factor and the wavelength of the cavity mode independently, which is highly relevant for single photon source applications. First, this allows for the optimization of the extraction efficiency while maintaining a high Purcell factor. Second, the cavity mode can be matched with a spectrally misaligned quantum dot without changing the structure or degrading the Q-factor: a 3 nm resonance shift is reported.