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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 25 — Dec. 7, 2009
  • pp: 22452–22461

Epitaxial quantum dots in stretchable optical microcavities

Tim Zander, Andreas Herklotz, Suwit Kiravittaya, Mohamed Benyoucef, Fei Ding, Paola Atkinson, Santosh Kumar, Johannes D. Plumhof, Kathrin Dörr, Armando Rastelli, and Oliver G. Schmidt  »View Author Affiliations

Optics Express, Vol. 17, Issue 25, pp. 22452-22461 (2009)

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Arrays of GaAs microring optical resonators with embedded InGaAs quantum dots (QDs) are placed on top of Pb(Mg1/3Nb2/3)O3-PbTiO3 piezoelectric actuators, which allow the microcavities to be reversibly “stretched” or “squeezed” by applying relatively large biaxial stresses at low temperatures. The emission energy of both QDs and optical modes red- or blue- shift depending on the strain sign, with the QD emission shifting more rapidly than the optical mode with applied strain. The QD energy shifts are used to estimate the strain in the structures based on linear deformation potential theory and the finite element method. The shift of the modes is attributed to both the physical deformation and the change in refractive index due to the photoelastic effect. Remarkably, excitonic emissions from different QDs are observed to shift at different rates, implying that this technique can be used to bring spatially separated excitons into resonance.

© 2009 OSA

OCIS Codes
(160.2260) Materials : Ferroelectrics
(270.5580) Quantum optics : Quantum electrodynamics
(140.3945) Lasers and laser optics : Microcavities
(140.3948) Lasers and laser optics : Microcavity devices
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:
Lasers and Laser Optics

Original Manuscript: July 30, 2009
Revised Manuscript: October 30, 2009
Manuscript Accepted: October 30, 2009
Published: November 23, 2009

Tim Zander, Andreas Herklotz, Suwit Kiravittaya, Mohamed Benyoucef, Fei Ding, Paola Atkinson, Santosh Kumar, Johannes D. Plumhof, Kathrin Dörr, Armando Rastelli, and Oliver G. Schmidt, "Epitaxial quantum dots in stretchable optical microcavities," Opt. Express 17, 22452-22461 (2009)

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