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 orders of magnitude more power throughput than a conventional square aperture with a similar near-field spot size of 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
Full Article | PDF ArticleMore Like This
Xiaolei Shi and Lambertus Hesselink
J. Opt. Soc. Am. B 21(7) 1305-1317 (2004)
Kaan T. Gunay, Patrick W. Flanigan, Pei Liu, and Domenico Pacifici
J. Opt. Soc. Am. B 31(5) 1150-1158 (2014)
Tineke Thio, K. M. Pellerin, R. A. Linke, H. J. Lezec, and T. W. Ebbesen
Opt. Lett. 26(24) 1972-1974 (2001)