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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 6 — Feb. 20, 2010
  • pp: 1012–1019

Temperature dependence of optical near-field energy transfer rate between two quantum dots in nanophotonic devices

Arash Karimkhani and Mohammad Kazem Moravvej-Farshi  »View Author Affiliations


Applied Optics, Vol. 49, Issue 6, pp. 1012-1019 (2010)
http://dx.doi.org/10.1364/AO.49.001012


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Abstract

We have obtained a simple numerical model that explains the temperature behavior of multi-quantum-dot (QD) nanophotonic devices whose operations are based on optical near-field (ONF) interactions between any two resonant QDs that are in thermal equilibrium. This model involves a set of coupled rate equations that govern the temporal behavior of the QDs’ energy level occupancies. Under a certain operating condition, this simple model can substitute for the more complex density matrix (DM) approach in modeling the temperature dependence of the ONF energy transfer rate ( R ONF ) between any two resonant QDs in thermal equilibrium. The same applies for modeling the system state-filling time ( τ S ). Applying our simple model to a two-QD system, we have derived analytical formulas for the interdot and the intradot transfer rates at finite temperatures ( T 0 ). Furthermore, by assuming a unidirectional energy transport operating condition, we have also derived an analytic formula for calculating τ S for a two-QD system. To the best of our knowledge, this work is the first instance of reporting such analytic equations. Approximated values of τ S obtained from our simple analytic equation are in reasonable agreements with those calculated by the DM approach.

© 2010 Optical Society of America

OCIS Codes
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Nanophotonics

History
Original Manuscript: November 9, 2009
Revised Manuscript: January 14, 2010
Manuscript Accepted: January 18, 2010
Published: February 18, 2010

Citation
Arash Karimkhani and Mohammad Kazem Moravvej-Farshi, "Temperature dependence of optical near-field energy transfer rate between two quantum dots in nanophotonic devices," Appl. Opt. 49, 1012-1019 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-6-1012

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