Results 211 to 220 of about 8,903 (251)

Subwavelength Grating Metamaterial Structures for Integrated Photonics

Optical Fiber Communication Conference (OFC) 2021, 2021
We report on our advances on the use of subwavelength metamaterials for silicon photonic devices, including narrowband filters, antennas, polarization handling, on-chip beam forming and sensing.
Robert Halir, Alejandro Sánchez-Postigo, Jose Manuel Luque-González, Abdelfettah Hadij-ElHouati, Daniel Pereira-Martín, Jonas Leuermann, Pablo Ginel-Moreno, Carlos Pérez-Armenta, Antonia Torres-Cubillo, Alaine Herrero-Bermello, Antonio Dias-Ponte, David González-Andrade, Aitor V. Velasco, J. Gonzalo Wangüemert-Pérez, Alejandro Ortega-Moñux, José de-Oliva-Rubio, Pavel Cheben, Jens H. Schmid, Jirí Ctyroký, Milos Nedeljkovic, Goran Z. Mashanovich, Íñigo Molina-Fernández   +21 more
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Subwavelength antireflection structures and their device applications

SPIE Proceedings, 2010
We 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
Jae Su Yu, Young Min Song, Jung Woo Leem, Yong Tak Lee   +3 more
openaire   +2 more sources

Super Black Material from Low-Density Carbon Aerogels with Subwavelength Structures

ACS Nano, 2016
Many scientists have devoted themselves to the study of the interaction between subwavelength structures and electromagnetic waves. These structures are commonly composed of regular arrays of subwavelength protuberances, which can be artificially ...
Ai Du, Bin Zhou
exaly   +2 more sources

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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
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Subwavelength structures for infrared filtering

SPIE Proceedings, 2010
This work deals with the replacement of the reflection layer stacks by sub-wavelength structures, which form the cavity of Fabry-Perot-Interferometer (FPI) infrared filters. Periodically arranged metal ring resonators are investigated regarding reflectivity and sensitivity with respect to polarization angle by Finite Difference Method (FDM) analysis.
Steffen Kurth, Karla Hiller, Norbert Neumann, Mario Seifert, Martin Ebermann, Joachim Zajadacz, Thomas Gessner   +6 more
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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

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

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

Multi-Beam Interference Advances and Applications: Nano-Electronics, Photonic Crystals, Metamaterials, Subwavelength Structures, Optical Trapping, and Biomedical Structures

Micromachines, 2011
Research in recent years has greatly advanced the understanding and capabilities of multi-beam interference (MBI). With this technology it is now possible to generate a wide range of one-, two-, and three-dimensional periodic optical-intensity ...
Guy M. Burrow, Thomas K. Gaylord
exaly   +2 more sources

Subwavelength imaging with a multilayer silver film structure

Optics Letters, 2006
A Ag/SiO2 multilayer imaging structure is shown to have subwavelength performance. Loss is the major limitation, and selection of low-loss materials and suitable operating wavelengths has a significant impact on performance. The influence of the variables is presented, and vortices are shown to exist.
K J, Webb, M, Yang
openaire   +2 more sources