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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 28, Iss. 15 — Aug. 1, 2003
  • pp: 1320–1322

Ultrahigh light transmission through a C-shaped nanoaperture

Xiaolei Shi, Lambertus Hesselink, and Robert L. Thornton  »View Author Affiliations


Optics Letters, Vol. 28, Issue 15, pp. 1320-1322 (2003)
http://dx.doi.org/10.1364/OL.28.001320


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Abstract

Optical resolution beyond the diffraction limit can be achieved by use of a metallic nanoaperture in a near-field optical system. Conventional nanoapertures have very low power throughput. Using a numerical finite-difference time domain method, we discovered a unique C-shaped aperture that provides ~3 orders of magnitude more power throughput than a conventional square aperture with a similar near-field spot size of ~0.1λ Microwave experiments at 6 GHz quantitatively confirmed the simulated transmission enhancement. The high transmission of the C-aperture—or one of the related shapes—is linked to both a propagation mode in the aperture and local surface plasmons.

© 2003 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(110.0180) Imaging systems : Microscopy
(120.7000) Instrumentation, measurement, and metrology : Transmission
(350.3950) Other areas of optics : Micro-optics
(350.5610) Other areas of optics : Radiation

Citation
Xiaolei Shi, Lambertus Hesselink, and Robert L. Thornton, "Ultrahigh light transmission through a C-shaped nanoaperture," Opt. Lett. 28, 1320-1322 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-15-1320

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