Open AccessPolarized quantum dot emission from photonic crystal nanocavities studied under moderesonant enhanced excitation
Author(s) -
Ruth Oulton,
Bryan D. Jones,
Sang Lam,
A. R. A. Chalcraft,
D. Szymanski,
D. O’Brien,
Thomas F. Krauss,
D. Sanvitto,
A. M. Fox,
D. M. Whittaker,
M. Hopkinson,
M. S. Skolnick
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.15.017221
Subject(s) - laser linewidth , quantum dot , photonic crystal , excitation , optics , polarization (electrochemistry) , physics , purcell effect , optoelectronics , spontaneous emission , materials science , laser , quantum mechanics , chemistry
We study the linear polarization of the emission from single quantum dots embedded in an "L3" defect nanocavity in a two-dimensional photonic crystal. By using narrow linewidth optical excitation in resonance with higher-order modes, we are able to achieve strong quantum dot emission intensity whilst reducing the background from quantum dots in the surrounding lattice. We find that all the dots observed emit very strongly linearly polarized light of the same orientation as the closest mode, despite the fact that these quantum dots may be spectrally detuned by several times the mode linewidth. We discuss the coupling mechanisms which may explain this behavior.