Results 191 to 200 of about 12,290,752 (249)
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Microscopy of subwavelength structures
Physics-Uspekhi, 1996A more accurate formulation of the Abbe theory is presented using well-known open resonator results, namely, field representation in terms of the eigenfunctions of the optical system viewed as a segment of an equivalent lens waveguide; and the use of the mirror Fresnel number dependence of the diffraction losses of high-order Gaussian beams for ...
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Subwavelength structures and their use in diffractive optics
Optical Engineering, 1996A novel design for imitating continuous phase profiles by bi- nary subwavelength structures is presented. The working principle has recently been shown for regular gratings like beam deflectors (Haidner et al., 1993) or polarizing beamsplitters (Collischon et al., 1994). Our objective is to transfer this principle to non-strictly periodic gratings such
Helmut Haidner +3 more
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Anderson Localization in Subwavelength Plasmonic Structures
Frontiers in Optics / Laser Science, 2018We used the FDTD simulation to study photon propagation in arrays of plasmonic particles. In such systems, structural randomness can lead to localization of light in the deep subwavelength regime, similar to Anderson localization of electrons.
Ali Ghoreyshi, Randall H Victora
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Subwavelength Artificial Structures: Opening a New Era for Engineering Optics
Advances in Materials, 2018In the past centuries, the scale of engineering optics has evolved toward two opposite directions: one is represented by giant telescopes with apertures larger than tens of meters and the other is the rapidly developing micro/nano‐optics and ...
Xiangang Luo
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Optical Elements with Subwavelength Structured Surfaces
Optical Review, 2003Various optical elements with subwavelength structured surfaces have been developed. The periods of the subwavelength structures are too short to generate diffracted light waves. But the structures are equivalent to refractive index materials with form birefringence.
Hiroshi Toyota, Hisao Kikuta, Wanji Yu
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Advances in Materials, 2023
Traditional honeycomb‐like structural electromagnetic (EM)‐wave‐absorbing materials have been widely used in various equipment as multifunctional materials.
Q. An +6 more
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Traditional honeycomb‐like structural electromagnetic (EM)‐wave‐absorbing materials have been widely used in various equipment as multifunctional materials.
Q. An +6 more
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Subwavelength structures for broadband antireflection application
Optics Communications, 2009The subwavelength structures are designed and fabricated for broadband antireflection application. Under target of zero reflectivity, the parameters of periodic 2-D continuous conical structures are analyzed by the finite-difference time-domain (FDTD) method.
Chia Jen Ting +3 more
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High-Q subwavelength dielectric structures
Smart Photonic and Optoelectronic Integrated Circuits XXIII, 2021Recent progress is nanoscale photonics is driven by the physics of Mie resonances of high-index dielectric nanoparticles that provides a novel platform for localization of light in subwavelength photonic structures and opens new horizons for metamaterial-enabled photonics, or metaphotonics.
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Subwavelength antireflection structures and their device applications
SPIE Proceedings, 2010We report the subwavelength antireflection structures in various semiconductor materials such as Si, ZnO, and GaP/light emitting diode (LED) structure for LED and solar cell applications in the visible and near-infrared wavelength region, together with the rigorous coupled wave analysis simulation. Subwavelength structures are fabricated by holographic
Jung Woo Leem +3 more
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Subwavelength-structured polarization-selective surfaces
SPIE Proceedings, 1998Subwavelength-period gratings exhibit a number of interesting polarization-selective properties. We investigate several such phenomena: an `inverse' wire-grid polarizer, which transmits TE light while stopping TM light, a guided-mode resonance filter with an order-of-magnitude difference in the width of the reflectance peak for the two orthogonal ...
Pasi Vahimaa +6 more
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