We present experimental results and a numerical model confirming that surface plasmons can resonantly enhance light transmission through a corrugated metal film. A new interpretation in terms of plasmon-assisted light tunneling is given to recent experiments on light penetration through periodic subwavelength holes in a thin metal film. We designed a narrow-band filter suitable for applications in optical communication by optimizing the film and the grating parameters.
© 2000 Optical Society of America
(050.1940) Diffraction and gratings : Diffraction
(050.2770) Diffraction and gratings : Gratings
(130.2790) Integrated optics : Guided waves
(310.6860) Thin films : Thin films, optical properties
Ivan Avrutsky, Yang Zhao, and Vladimir Kochergin, "Surface-plasmon-assisted resonant tunneling of light through a periodically corrugated thin metal film," Opt. Lett. 25, 595-597 (2000)