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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 22 — Nov. 15, 2010
  • pp: 3748–3750

Infrared dipole antenna enhanced by surface phonon polaritons

Hyun Chul Kim and Xing Cheng  »View Author Affiliations


Optics Letters, Vol. 35, Issue 22, pp. 3748-3750 (2010)
http://dx.doi.org/10.1364/OL.35.003748


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Abstract

In this Letter, we propose a gold dipole antenna formed on a SiC substrate to achieve a strong concentration of mid-IR radiation based on a synergistic integration of the IR dipole antenna and the resonance excitation of a surface phonon polariton. Numerical simulation based on the finite-difference time-domain technique shows that the intensity enhancement can be greater than 10 7 times at the mid-IR spectral region. The influence of the geometric parameters (i.e., antenna length, gap dimension, antenna thickness, and antenna width) on the antenna field enhancement is also studied. The strong intensity enhancement can find important applications in highly sen sitive mid-IR photodetectors and in molecular detection and identification by surface-enhanced IR absorption spectroscopy techniques.

© 2010 Optical Society of America

OCIS Codes
(240.0240) Optics at surfaces : Optics at surfaces
(240.5420) Optics at surfaces : Polaritons
(260.3060) Physical optics : Infrared
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Physical Optics

History
Original Manuscript: April 29, 2010
Revised Manuscript: August 31, 2010
Manuscript Accepted: October 11, 2010
Published: November 3, 2010

Citation
Hyun Chul Kim and Xing Cheng, "Infrared dipole antenna enhanced by surface phonon polaritons," Opt. Lett. 35, 3748-3750 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-22-3748

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