A Practical V-Shaped Nano-Aperture Flanked with Surface Corrugationsfor Beam Focusing
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 d 2 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 μm focal length and ∼4 μm 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 d 1 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.
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Document Type: Research Article
Publication date: 2007-05-01
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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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