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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 23 — Nov. 18, 2013
  • pp: 28513–28522

Enhanced and suppressed infrared transmission through germanium subwavelength arrays

Wei Dong, Toru Hirohata, Kazutoshi Nakajima, and Xiaoping Wang  »View Author Affiliations

Optics Express, Vol. 21, Issue 23, pp. 28513-28522 (2013)

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We have studied the zero-order transmission of periodic germanium (Ge) subwavelength arrays in an infrared range by using finite-difference time-domain simulations. A special wavelength-selective peak in a triangular hole array of Ge film is observed with an enhanced transmission accompanied by a drastic suppression nearby, which cannot be found in a one-dimensional Ge subwavelength array and is different from the extraordinary transmission related to surface plasmons in a metal film. The electromagnetic field is found to be concentrated on both surfaces of the Ge film at this peak. The unique transmission is verified through measurements on fabricated samples and is interpreted using the photonic band structure.

© 2013 Optical Society of America

OCIS Codes
(120.7000) Instrumentation, measurement, and metrology : Transmission
(130.3060) Integrated optics : Infrared
(240.6690) Optics at surfaces : Surface waves
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:

Original Manuscript: September 18, 2013
Revised Manuscript: November 2, 2013
Manuscript Accepted: November 5, 2013
Published: November 13, 2013

Wei Dong, Toru Hirohata, Kazutoshi Nakajima, and Xiaoping Wang, "Enhanced and suppressed infrared transmission through germanium subwavelength arrays," Opt. Express 21, 28513-28522 (2013)

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