A Practical V-Shaped Nano-Aperture Flanked with Surface Corrugationsfor Beam Focusing
Abstract:A V-shaped nano-aperture flanked with surface corrugations at exit side for beam focusing is introduced in this paper. Our finite-difference time domain (FDTD)numerical algorithm results demonstrate that the V-shaped aperture with width at incident side d2 as small as 10 nm and surrounded with 14 grooves with a constant depth of 80 nm can intensely excite a transmission and focusing the beam in far-field region. The beam propagating with 78.91 m focal length and ∼4 m spot size can be obtained for the practical V-shaped nano-aperture which can be naturally formed during the FIB fine milling. Changing the groove number and aperture width at exit side d1 has limited contribution on the transmission due to their nonlinear relations with the electric field intensity |E|2. The V-shaped nanostructures may be useful in nanophotonics devices.
Document Type: Research Article
Publication date: May 1, 2007
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- Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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