Browsing by Keywords "Spatial filtering"
Now showing items 1-6 of 6
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Convolution and filtering in fractional fourier domains
(Springer-Verlag, 1994)Fractional Fourier transforms, which are related to chirp and wavelet transforms, lead to the notion of fractional Fourier domains. The concept of filtering of signals in fractional domains is developed, revealing that ... -
Fractional Fourier transforms and their optical implementation. II
(Optical Society of America, 1993)The derivation of a linear transform kernel for fractional Fourier transforms is presented. Discussed in direct relation to fractal Fourier transforms are spatial resolution and the space-bandwidth product for propagation ... -
Graded-index fibers, Wigner-distribution functions, and the fractional Fourier transform
(Optical Society of America, 1994)Two definitions of a fractional Fourier transform have been proposed previously. One is based on the propagation of a wave field through a graded-index medium, and the other is based on rotating a function's Wigner ... -
Multifrequency spatial filtering: a general property of two-dimensional photonic crystals
(Elsevier, 2016)Spatial filtering, an analog of frequency-domain filtering that can be obtained in the incidence angle domain at a fixed frequency is studied in the transmission mode for slabs of two-dimensional rod-type photonic crystals. ... -
A simple mie-resonator based meta-array with diverse deflection scenarios enabling multifunctional operation at near-infrared
(De Gruyter Open, 2020)Deflection, a basic functionality of wavefront manipulation is usually associated with the phase-gradient metasurfaces and the classical blazed gratings. We numerically and experimentally demonstrate an unusually wideband ... -
Spatial and spatial-frequency filtering using one-dimensional graded-index lattices with defects
(ELSEVIER, 2009)The potential of one-dimensional, periodic, graded-index, isotropic dielectric lattices with defects in multiband spatial and spatial-frequency filtering is studied. It is shown that both narrow- and wide-bandpass filters ...
