Open AccessPhotonic crystal waveguides intersection for resonant quantum dot optical spectroscopy detection
Author(s) -
Xiu-Neng Song,
S. Declair,
Torsten Meier,
A. Zrenner,
Jens Förstner
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.014130
Subject(s) - quantum dot , optics , photonic crystal , physics , transverse plane , spectroscopy , perpendicular , laser , photonics , optoelectronics , excitation , geometry , mathematics , structural engineering , quantum mechanics , engineering
Using a finite-difference time-domain method, we theoretically investigate the optical spectra of crossing perpendicular photonic crystal waveguides with quantum dots embedded in the central rod. The waveguides are designed so that the light mainly propagates along one direction and the cross talk is greatly reduced in the transverse direction. It is shown that when a quantum dot (QD) is resonant with the cavity, strong coupling can be observed via both the transmission and crosstalk spectrum. If the cavity is far off-resonant from the QD, both the cavity mode and the QD signal can be detected in the transverse direction since the laser field is greatly suppressed in this direction. This structure could have strong implications for resonant excitation and in-plane detection of QD optical spectroscopy.