Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Vijayakumar C. Venugopal"'
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 18:1538-1545
Sculptured thin films (STFs) are a new class of engineered columnar thin films in which their shapes can resemble oblique matchsticks, chevrons, multiple zigzags, S’s, C’s, helices, and even superhelices. They can have densities as low as 10%–3
Publikováno v:
The European Physical Journal Applied Physics. 10:173-184
The spectral signatures of non-axially excited, absorbing TFHBM slabs are determined, after using a single-resonance Lorentzian model to describe the dispersive properties of the medium. Optical phenomena such as the optical rotation, circular dichro
Publikováno v:
Optics Communications. 177:57-68
Chiral sculptured thin films (STFs) display the circular Bragg phenomenon, whereby their planewave transmittance spectrums exhibit narrow-bandstop characteristics in several wavelength regimes. The insertion of a homogeneous, anisotropic, thin layer
Publikováno v:
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences. 456:125-161
Thin–film helicoidal bianisotropic mediums (TFHBMs) are rotationally non–homogeneous mediums whose microstructure consists of parallel helical columns. We characterize here the plane–wave response of non–axially excited dielectric TFHBM slabs
Publikováno v:
Microwave and Optical Technology Letters. 20:218-222
The optical response of a thin-film helicoidal bianisotropic medium (TFHBM) slab to a normally incident plane wave is shown to be affected by a substrate and a lid, both nondissipative. The theoretical transmissivity of the TFHBM changes with the inc
Publikováno v:
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences. 454:1535-1571
The electromagnetic properties of a thinfilm helicoidal bianisotropic medium (TFHBM) are totally delineated by a reference crystallographic symmetry as well as a helicoidal rotation matrix. The res...
Publikováno v:
Optics Communications. 149:217-222
A sculptured nematic thin film (SNTF) slab with sinusoidally nonhomogeneous permittivity dyadic is shown to act as a polarization-discriminatory bandstop filter for normally incident light. A cascade of two matched SNTF slabs is shown to act as a pol
Publikováno v:
International Journal of Applied Electromagnetics and Mechanics. 9:201-210
The tilt angles and the ellipticities of transmitted and reflected plane waves are shown to be different from those of plane waves normally incident on slabs of dissipative dielectric thin-film helicoidal bianisotropic mediums (TFHBMs). These slabs c
Publikováno v:
Microwave and Optical Technology Letters. 17:135-140
Publikováno v:
Optics Communications. 145:171-187
The planewave response of an axially excited slab made of an absorbing dielectric thin-film helicoidal bianisotropic medium (TFHBM) is examined. A three-zone classification scheme for non-absorbing TFHBMs collapses into a two-zone classification sche