Optical transmission enhancement by a sub-wavelength film lens
Author(s): Fei Zhou, Wendong Xu, Yang Wang, Fuxi Gan
Pages: 52-54
Year: 2006 Issue: 1
Journal: CHINESE OPTICS OF LETTERS
Abstract: A new sub-wavelength metallic film lens configuration is proposed, which is embedded in a thin ideal metal film, and its near field optical properties are investigated by finite-difference time-domain (FDTD)method. It is found that the optical transmission is greatly enhanced, and the spot size can be reduced by the sub-wavelength metallic film lens in comparison with the bare aperture. This kind of lens is expected to have practical applications in the very small aperture laser (VSAL), a promising nanosource for near-field optical storage and lithography.
Pages: 52-54
Year: 2006 Issue: 1
Journal: CHINESE OPTICS OF LETTERS
Abstract: A new sub-wavelength metallic film lens configuration is proposed, which is embedded in a thin ideal metal film, and its near field optical properties are investigated by finite-difference time-domain (FDTD)method. It is found that the optical transmission is greatly enhanced, and the spot size can be reduced by the sub-wavelength metallic film lens in comparison with the bare aperture. This kind of lens is expected to have practical applications in the very small aperture laser (VSAL), a promising nanosource for near-field optical storage and lithography.
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