Nanowire coupling to photonic crystal nanocavities for single photon sources.
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.
Grillet
Christian
C
Monat
Christelle
C
Smith
Cameron L
CL
Eggleton
Benjamin J
BJ
Moss
David J
DJ
Frédérick
Simon
S
Dalacu
Dan
D
Poole
Philip J
PJ
Lapointe
Jean
J
Aers
Geof
G
Williams
Robin L
RL