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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 3 — Jan. 31, 2011
  • pp: 2589–2598

Strong coupling between two quantum dots and a photonic crystal cavity using magnetic field tuning

Hyochul Kim, Deepak Sridharan, Thomas C. Shen, Glenn S. Solomon, and Edo Waks  »View Author Affiliations


Optics Express, Vol. 19, Issue 3, pp. 2589-2598 (2011)
http://dx.doi.org/10.1364/OE.19.002589


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Abstract

We demonstrate strong coupling between two indium arsenide (InAs) quantum dots (QDs) and a photonic crystal cavity by using a magnetic field as a frequency tuning method. The magnetic field causes a red shift of an exciton spin state in one QD and a blue shift in the opposite exciton spin state of the second QD, enabling them to be simultaneously tuned to the same cavity resonance. This method can match the emission frequency of two QDs separated by detunings as large as 1.35 meV using a magnetic field of up to 7 T. By controlling the detuning between the two QDs we measure the vacuum Rabi splitting (VRS) both when the QDs are individually coupled to the cavity, as well as when they are coupled to the cavity simultaneously. In the latter case the oscillator strength of two QDs shows a collective behavior, resulting in enhancement of the VRS as compared to the individual cases. Experimental results are compared to theoretical calculations based on the solution to the full master equation and found to be in excellent agreement.

© 2011 Optical Society of America

OCIS Codes
(230.3810) Optical devices : Magneto-optic systems
(270.5580) Quantum optics : Quantum electrodynamics
(230.5298) Optical devices : Photonic crystals

ToC Category:
Quantum Optics

History
Original Manuscript: January 5, 2011
Revised Manuscript: January 15, 2011
Manuscript Accepted: January 19, 2011
Published: January 26, 2011

Citation
Hyochul Kim, Deepak Sridharan, Thomas C. Shen, Glenn S. Solomon, and Edo Waks, "Strong coupling between two quantum dots and a photonic crystal cavity using magnetic field tuning," Opt. Express 19, 2589-2598 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-3-2589


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