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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 10 — May. 15, 2014
  • pp: 3002–3005

Adjoint sensitivity analysis of plasmonic structures using the FDTD method

Yu Zhang, Osman S. Ahmed, and Mohamed H. Bakr  »View Author Affiliations


Optics Letters, Vol. 39, Issue 10, pp. 3002-3005 (2014)
http://dx.doi.org/10.1364/OL.39.003002


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Abstract

We present an adjoint variable method for estimating the sensitivities of arbitrary responses with respect to the parameters of dispersive discontinuities in nanoplasmonic devices. Our theory is formulated in terms of the electric field components at the vicinity of perturbed discontinuities. The adjoint sensitivities are computed using at most one extra finite-difference time-domain (FDTD) simulation regardless of the number of parameters. Our approach is illustrated through the sensitivity analysis of an add–drop coupler consisting of a square ring resonator between two parallel waveguides. The computed adjoint sensitivities of the scattering parameters are compared with those obtained using the accurate but computationally expensive central finite difference approach.

© 2014 Optical Society of America

OCIS Codes
(000.3860) General : Mathematical methods in physics
(000.4430) General : Numerical approximation and analysis
(240.6680) Optics at surfaces : Surface plasmons
(050.1755) Diffraction and gratings : Computational electromagnetic methods
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optoelectronics

History
Original Manuscript: March 11, 2014
Revised Manuscript: April 7, 2014
Manuscript Accepted: April 8, 2014
Published: May 14, 2014

Citation
Yu Zhang, Osman S. Ahmed, and Mohamed H. Bakr, "Adjoint sensitivity analysis of plasmonic structures using the FDTD method," Opt. Lett. 39, 3002-3005 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-10-3002


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