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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 14 — Jul. 15, 2012
  • pp: 2880–2882

Finite-difference time-domain technique as an efficient tool for calculating the regularized Green function: applications to the local-field problem in quantum optics for inhomogeneous lossy materials

C. Van Vlack and S. Hughes  »View Author Affiliations


Optics Letters, Vol. 37, Issue 14, pp. 2880-2882 (2012)
http://dx.doi.org/10.1364/OL.37.002880


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Abstract

The calculation of the local density of states (LDOS) in lossy materials has long been disputed due to the divergence of the homogeneous Green function with equal space arguments. For arbitrary-shaped lossy structures, such as those of interest in nanoplasmonics, this problem is particularly challenging. A nondivergent LDOS obtained in numerical methods such as the finite-difference time-domain (FDTD) technique, at first sight appears to be wrong. Here we show that FDTD is not only an ideal choice for obtaining the regularized LDOS, but it can address the local-field problem for any lossy inhomogeneous material. We exemplify the case of a finite-size photon emitter (e.g., a single quantum dot) embedded within and outside a lossy metal nanoparticle and show excellent agreement with analytical results.

© 2012 Optical Society of America

OCIS Codes
(240.0240) Optics at surfaces : Optics at surfaces
(240.6680) Optics at surfaces : Surface plasmons
(270.0270) Quantum optics : Quantum optics
(270.5580) Quantum optics : Quantum electrodynamics

ToC Category:
Quantum Optics

History
Original Manuscript: March 28, 2012
Revised Manuscript: May 8, 2012
Manuscript Accepted: May 15, 2012
Published: July 11, 2012

Citation
C. Van Vlack and S. Hughes, "Finite-difference time-domain technique as an efficient tool for calculating the regularized Green function: applications to the local-field problem in quantum optics for inhomogeneous lossy materials," Opt. Lett. 37, 2880-2882 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-14-2880


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