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Title: Position dependent optical coupling between single quantum dots and photonic crystal nanocavities

Abstract

We demonstrate precise and quick detection of the positions of quantum dots (QDs) embedded in two-dimensional photonic crystal nanocavities. We apply this technique to investigate the QD position dependence of the optical coupling between the QD and the nanocavity. We use a scanning electron microscope (SEM) operating at a low acceleration voltage to detect surface bumps induced by the QDs buried underneath. This enables QD detection with a sub-10 nm precision. We then experimentally measure the vacuum Rabi spectra to extract the optical coupling strengths (gs) between single QDs and cavities, and compare them to the values estimated by a combination of the SEM-measured QD positions and electromagnetic cavity field simulations. We found a highly linear relationship between the local cavity field intensities and the QD-cavity gs, suggesting the validity of the point dipole approximation used in the estimation of the gs. The estimation using SEM has a small standard deviation of ±6.2%, which potentially enables the high accuracy prediction of g prior to optical measurements. Our technique will play a key role for deeply understanding the interaction between QDs and photonic nanostructures and for advancing QD-based cavity quantum electrodynamics.

Authors:
;  [1]; ;  [2]; ;  [1];  [3]
  1. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan)
  2. Institute of Nano Quantum Information Electronics, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan)
  3. (Japan)
Publication Date:
OSTI Identifier:
22590510
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 109; Journal Issue: 7; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APPROXIMATIONS; CRYSTALS; ELECTRIC POTENTIAL; ELECTRON SCANNING; QUANTUM DOTS; QUANTUM ELECTRODYNAMICS; SCANNING ELECTRON MICROSCOPY; SPACE DEPENDENCE; TWO-DIMENSIONAL SYSTEMS

Citation Formats

Kuruma, K., Takamiya, D., Ota, Y., Kakuda, M., Iwamoto, S., Arakawa, Y., and Institute of Nano Quantum Information Electronics, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505. Position dependent optical coupling between single quantum dots and photonic crystal nanocavities. United States: N. p., 2016. Web. doi:10.1063/1.4961389.
Kuruma, K., Takamiya, D., Ota, Y., Kakuda, M., Iwamoto, S., Arakawa, Y., & Institute of Nano Quantum Information Electronics, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505. Position dependent optical coupling between single quantum dots and photonic crystal nanocavities. United States. doi:10.1063/1.4961389.
Kuruma, K., Takamiya, D., Ota, Y., Kakuda, M., Iwamoto, S., Arakawa, Y., and Institute of Nano Quantum Information Electronics, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505. Mon . "Position dependent optical coupling between single quantum dots and photonic crystal nanocavities". United States. doi:10.1063/1.4961389.
@article{osti_22590510,
title = {Position dependent optical coupling between single quantum dots and photonic crystal nanocavities},
author = {Kuruma, K. and Takamiya, D. and Ota, Y. and Kakuda, M. and Iwamoto, S. and Arakawa, Y. and Institute of Nano Quantum Information Electronics, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505},
abstractNote = {We demonstrate precise and quick detection of the positions of quantum dots (QDs) embedded in two-dimensional photonic crystal nanocavities. We apply this technique to investigate the QD position dependence of the optical coupling between the QD and the nanocavity. We use a scanning electron microscope (SEM) operating at a low acceleration voltage to detect surface bumps induced by the QDs buried underneath. This enables QD detection with a sub-10 nm precision. We then experimentally measure the vacuum Rabi spectra to extract the optical coupling strengths (gs) between single QDs and cavities, and compare them to the values estimated by a combination of the SEM-measured QD positions and electromagnetic cavity field simulations. We found a highly linear relationship between the local cavity field intensities and the QD-cavity gs, suggesting the validity of the point dipole approximation used in the estimation of the gs. The estimation using SEM has a small standard deviation of ±6.2%, which potentially enables the high accuracy prediction of g prior to optical measurements. Our technique will play a key role for deeply understanding the interaction between QDs and photonic nanostructures and for advancing QD-based cavity quantum electrodynamics.},
doi = {10.1063/1.4961389},
journal = {Applied Physics Letters},
number = 7,
volume = 109,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}