Off-axis beaming from subwavelength apertures
نویسندگان
چکیده
منابع مشابه
Two-dimensional control of surface plasmons and directional beaming from arrays of subwavelength apertures
We demonstrate two-dimensional control of coherent modes of surface plasmons (SP) in a metallic array of subwavelength apertures. SP mode intensity and propagation direction is manipulated by varying the wavelength, incidence angle, and polarization of the excitation photons. We also demonstrate directional beaming of light from this device. Finite-difference-time-domain simulations of the SP m...
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Light usually diffracts in all directions when it emerges from a subwavelength aperture, which puts a lower limit on the size of features that can be used in photonics. This limitation can be overcome by creating a periodic texture on the exit side of a single aperture in a metal film. The transmitted light emerges from the aperture as a beam with a small angular divergence (approximately +/-3 ...
متن کاملBeaming matter waves from a subwavelength aperture
We show theoretically that the shape of a beam of matter waves cold atoms emerging from one subwavelength aperture pierced in a film can be collimated within a few degrees. By means of an external laser field, a potential well for the atoms in the direction perpendicular to the surface is created. In this way, a running surface matter wave can be excited when atoms diffract from the aperture. I...
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— Gamma-Ray Bursts (GRBs) are widely thought to originate from collimated jets of material moving at relativistic velocities. Emission from such a jet should be visible even when viewed from outside the angle of collimation. Using Monte Carlo population synthesis methods and including the effects of this off-axis beaming, we can compare various GRB jet models against the global properties of ob...
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A peak of the detected fluorescence rate per molecule has recently been observed in experiments of fluorescence correlation spectroscopy carried out on subwavelength apertures in metallic screens, a phenomenon that appears at a diameter-to-wavelength ratio below the fundamental mode cutoff. Although the origin of the resonant transmission through a subwavelength aperture has been well explained...
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2008
ISSN: 0021-8979
DOI: 10.1063/1.2990063