Photonic Crystals with Split Ring Unit Cells for Subwavelength Light Confinement

2021 ◽  
Author(s):  
Kellen Arnold ◽  
Sami Halimi ◽  
Joshua Allen ◽  
Shuren Hu ◽  
Sharon Weiss
Keyword(s):  
Photonic Crystals ◽  
Split Ring ◽  
Light Confinement ◽  
Unit Cells

scholarly journals A Multiband Antenna Stacked with Novel Metamaterial SCSRR and CSSRR for WiMAX/WLAN Applications

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 113
Author(s):  
Rajiv Mohan David ◽  
Mohammad Saadh AW ◽  
Tanweer Ali ◽  
Pradeep Kumar
Keyword(s):  
Split Ring Resonator ◽  
Unit Cell ◽  
Ring Resonators ◽  
Split Ring ◽  
Medium Theory ◽  
High Frequency Structure Simulator ◽  
Dimension Analysis ◽  
Unit Cells ◽  
Coaxial Feed ◽  
Triple Band

This paper presents an innovative method for the design of a triple band meta-mode antenna. This unique design of antenna finds application in a particular frequency band of WLAN and WiMAX. This antenna comprises of a square complimentary split ring resonator (SCSRR), a coaxial feed, and two symmetrical comb shaped split ring resonators (CSSRR). The metamaterial unit cell SCSRR independently gains control in the band range 3.15–3.25 GHz (WiMAX), whereas two symmetrical CSSRR unit cell controls the band in the ranges 3.91–4.01 GHz and 5.79–5.94 GHz (WLAN). This design methodology and the study of the suggested unit cells structure are reviewed in classical waveguide medium theory. The antenna has a miniaturized size of only 0.213λ0 × 0.192λ0 × 0.0271λ0 (20 × 18 × 2.54 mm3, where λ0 is the free space wavelength at 3.2 GHz). The detailed dimension analysis of the proposed antenna and its radiation efficiency are also presented in this paper. All the necessary simulations are carried out in High Frequency Structure Simulator (HFSS) 13.0 tool.

Tight Control of Light Beams in Photonic Crystals with Spatially-Variant Unit Cells

2015 ◽  
Author(s):  
Jennefir L. Digaum ◽  
Rashi Sharma ◽  
Javier J. Pazos ◽  
Raymond C. Rumpf ◽  
Stephen M. Kuebler
Keyword(s):  
Photonic Crystals ◽  
Tight Control ◽  
Unit Cells ◽  
Spatially Variant ◽  
Light Beams

scholarly journals Fully Metallic Flat Lens Based on Locally Twist-Symmetric Array of Complementary Split-Ring Resonators

Symmetry ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 581 ◽  
Author(s):  
Oskar Dahlberg ◽  
Guido Valerio ◽  
Oscar Quevedo-Teruel
Keyword(s):  
Communication Networks ◽  
Focal Point ◽  
Spherical Wave ◽  
Unit Cell ◽  
Phase Delay ◽  
Ring Resonators ◽  
Wireless Communication Networks ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Unit Cells

In this article, we demonstrate how twist symmetries can be employed in the design of flat lenses. A lens design is proposed, consisting of 13 perforated metallic sheets separated by an air gap. The perforation in the metal is a two-dimensional array of complementary split-ring resonators. In this specific design, the twist symmetry is local, as it is only applied to the unit cell of the array. Moreover, the twist symmetry is an approximation, as it is only applied to part of the unit cell. First, we demonstrate that, by varying the order of twist symmetry, the phase delay experienced by a wave propagating through the array can be accurately controlled. Secondly, a lens is designed by tailoring the unit cells throughout the aperture of the lens in order to obtain the desired phase delay. Simulation and measurement results demonstrate that the lens successfully transforms a spherical wave emanating from the focal point into a plane wave at the opposite side of the lens. The demonstrated concepts find application in future wireless communication networks where fully-metallic directive antennas are desired.

Fabrication of Polymer Photonic Crystals by Two-Photon Nanolithography

2003 ◽  
Vol 776 ◽  
Author(s):  
Tae-Woo Lee ◽  
Oleg Mitrofanov ◽  
Christopher A. White ◽  
Julia W. P. Hsu
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Laser Scanning ◽  
Focal Depth ◽  
Scanning Speed ◽  
Square Lattice ◽  
Beam Power ◽  
Two Photon ◽  
Aspect Ratios ◽  
Unit Cells

AbstractWe use a two-photon laser-scanning microscope to fabricate two-dimensional (2D) photonic crystal structures in commercially available SU-8 polymer films, and successfully demonstrate making nanostructures beyond the diffraction limit with high aspect ratios. By varying the laser beam power, scanning speed, focal depth, line spacing and scanning angles, we obtain 2D photonic crystals with circular, elliptical, rectangular, or diamond-shape unit cells in a hexagonal or square lattice. An aspect ratio as high as 6.9 with 250 nm line width was achieved. In addition, we can controllably place defects of specific patterns, e.g. lines, dots, and Y-splitters, in the otherwise perfect photonic crystal. We also combine two-photon nanolithography with conventional UV photolithography to make 2D photonic crystals between waveguides. The combination of these two lithography methods was done on a single polymer film, suggesting potential for easy fabrication of complex photonic devices.

scholarly journals Two-dimensional photonic crystals with anisotropic unit cells imprinted from poly(dimethylsiloxane) membranes under elastic deformation

2008 ◽  
Vol 93 (16) ◽  
pp. 161911 ◽  
Author(s):  
Xuelian Zhu ◽  
Ying Zhang ◽  
Dinesh Chandra ◽  
Shih-Chieh Cheng ◽  
James M. Kikkawa ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Elastic Deformation ◽  
Two Dimensional ◽  
Unit Cells
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