Results 201 to 210 of about 6,073 (241)

Subwavelength-structured polarization-selective surfaces

SPIE Proceedings, 1998
Subwavelength-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 ...
Marko Honkanen, Ville Kettunen, Markku Kuittinen, Pasi Laakkonen, Jari Lautanen, Jari P. Turunen, Pasi Vahimaa   +6 more
openaire   +1 more source

Subwavelength structures in integrated optics

Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013, 2013
Subwavelenth structures offer exciting new opportunities for integrated optics. Effective refractive index can be chosen from a broad range by lithographic patterning using just two materials. Many practical subwavelength engineered devices already demonstrated, with superior performance compared to their conventional counterparts and likely many more ...
Pavel Cheben, J.H. Schmid, D.-X. Xu, J. Lapointe, S. Janz, R. Ma, A. Delâge, M. Vachon, M. Ibrahim, W.N. YeNational, P.J. Bock, T.J. Hall, R. Halir, A. Ortega-Moñux, C. Alonso-Ramos, A. Maese, I. Molina-Fernández, A. Villafranca Velasco, M.L. Calvo, J.M. Fédéli, L. Vivien, D. Marris-Morini   +21 more
openaire   +1 more source

Polarization separation element (subwavelength structure)

SPIE Proceedings, 2005
In many applications, where the period of a grating structure is less than the wavelength of the incident light, the grating structure will function more like a medium of uniform index of refraction than as a normal grating. The effective medium index being equivalent to the volume mean index of the grating structure.
Seiichiro Kitagawa, Kazuya Yamamoto, Makoto Okada   +2 more
openaire   +1 more source

Subwavelength structures in SOI waveguides

8th IEEE International Conference on Group IV Photonics, 2011
Our progress in subwavelength structures in silicon waveguides is reviewed. Several practical implementations of subwavelength grating waveguides are discussed, including fibre-chip couplers, waveguide crossings and athermal waveguides.
Cheben, Pavel, Schmid, Jens H., Bock, Przemek J., Lapointe, Jean, Janz, Siegfried, Xu, Dan-Xia, Densmore, Adam, Delâge, André, Ma, Rubin, Halir, Robert, Lamontagne, Boris, Ortega-Monux, Alejandro, Molina Fernandez, Iñigo, Fedeli, Jean-Marc, Ibrahim, Marc, Ye, Winnie N., Hall, Trevor J.   +16 more
openaire   +2 more sources

Subwavelength structure imaging

Optical Engineering, 2004
We expand conventional superresolving imaging systems toward extraction of suboptical wavelength structures. An imaging system that is capable of imaging subwavelength details is presented. Homogeneous waves carrying information on spatial frequencies exceeding the classical limit of resolution can be created by diffraction of evanescent waves.
openaire   +1 more source

Microscopy of subwavelength structures

Physics-Uspekhi, 1996
A 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 ...
openaire   +1 more source

Phase gratings with subwavelength structures

Journal of the Optical Society of America A, 1995
Polarization-selective gratings are designed by use of rigorous electromagnetic diffraction theory. The polarizing effects are attained by special surface-relief structures. We present a scheme for coding two different optical functions in one diffractive element.
Martin Schmitz, Ralf Bräuer, Olof Bryngdahl   +2 more
openaire   +1 more source

Anderson Localization in Subwavelength Plasmonic Structures

Frontiers in Optics / Laser Science, 2018
We 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, R. H. Victora
openaire   +1 more source

High-performance subwavelength polarizer using “sandwich” structured substrates

Applied Optics, 2022
A subwavelength polarizer based on “sandwich” structured substrates is proposed in this study. The proposed subwavelength polarizer consists of three layers of subwavelength aluminum wires and dielectric substrate. The designed structure achieves an extinction ratio (ER) greater than 90 dB in a 400–800 nm visible wavelength region, achieving a maximum ...
Jiangting Zhao, Donghua Zhao, Wancheng Liu, Huiliang Cao, Chenguang Wang, Jun Tang, Chong Shen, Jun Liu   +7 more
openaire   +2 more sources

Subwavelength structures for broadband antireflection application

Optics Communications, 2009
The 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, Chi-Feng Chen, C.P. Chou
openaire   +1 more source