scholarly journals A Tunable Semiconductor‐Based Transmissive Metasurface: Dynamic Phase Control with High Transmission Level

2020 ◽  
Vol 14 (6) ◽  
pp. 1900353
Author(s):  
Ali Forouzmand ◽  
Hossein Mosallaei
Keyword(s):  
Phase Control ◽  
High Transmission ◽  
Dynamic Phase ◽  
Transmission Level

scholarly journals Generation of terahertz vector beams using dielectric metasurfaces via spin-decoupled phase control

Nanophotonics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 3393-3402 ◽  
Author(s):  
Yuehong Xu ◽  
Huifang Zhang ◽  
Quan Li ◽  
Xueqian Zhang ◽  
Quan Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Special Kind ◽  
Phase Control ◽  
High Resolution Imaging ◽  
Plasmon Excitation ◽  
Bessel Beams ◽  
Dynamic Phase ◽  
Vector Beams ◽  
Resolution Imaging ◽  
Spatially Variant

AbstractCylindrical vector beams (CVBs), being a special kind of beams with spatially variant states of polarizations, are promising in photonics applications, including high-resolution imaging, plasmon excitation, optical trapping, and laser machining. Recently, generating CVBs using metasurfaces has drawn enormous interest owing to their highly designable, multifunctional, and integratable features. However, related studies remain unexplored in the terahertz regime. Here, a generic method for efficiently generating terahertz CVBs carrying orbital angular momentums (OAMs) is proposed and experimentally demonstrated using transmission-type spatial-variant dielectric metasurfaces, which is realized by designing the interference between the two circularly polarized transmission components. This method is based on spin-decoupled phase control allowed by simultaneously manipulating the dynamic phase and geometric phase of each structure, endowing more degree of freedom in designing the vector beams. Two types of metasurfaces which respectively generate polarization-dependent terahertz vector vortex beams (VVBs) and vector Bessel beams (VBBs) are experimentally characterized. The proposed method opens a new window to generate versatile vector beams, providing new capabilities in developing novel, compact, and high-performance devices applicable to broad electromagnetic spectral regimes.

Dynamic phase control with printing and fluidic materials' interaction by inkjet printing an RF sensor directly on a stereolithographic 3D printed microfluidic structure

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Eiyong Park ◽  
Sungjoon Lim
Keyword(s):  
Surface Modification ◽  
High Resolution ◽  
Inkjet Printing ◽  
Phase Control ◽  
High Conductivity ◽  
Dynamic Phase ◽  
3D Printed ◽  
Rf Electronics ◽  
Microfluidic Structure

RF electronics is inkjet-printed directly onto a 3D printed microfluidic structure using surface modification for the high conductivity, high resolution, and enhanced the interaction between a RF part and a fluid material.

High-transmission dielectric metasurface with 2π phase control at visible wavelengths

2015 ◽  
Vol 9 (4) ◽  
pp. 412-418 ◽  
Author(s):  
Ye Feng Yu ◽  
Alexander Y. Zhu ◽  
Ramón Paniagua-Domínguez ◽  
Yuan Hsing Fu ◽  
Boris Luk'yanchuk ◽  
...  
Keyword(s):  
Phase Control ◽  
High Transmission ◽  
Visible Wavelengths ◽  
Dielectric Metasurface

scholarly journals High-Efficiency Metasurfaces with 2π Phase Control Based on Aperiodic Dielectric Nanoarrays

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 250 ◽  
Author(s):  
Sihui Shang ◽  
Feng Tang ◽  
Xin Ye ◽  
Qingzhi Li ◽  
Hailiang Li ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
High Efficiency ◽  
Control Mechanism ◽  
Phase Control ◽  
Geometrical Parameters ◽  
High Transmission ◽  
Electromagnetic Resonances ◽  
Design Freedom

In this study, the high-efficiency phase control Si metasurfaces are investigated based on aperiodic nanoarrays unlike widely-used period structures, the aperiodicity of which providing additional freedom to improve metasurfaces’ performance. Firstly, the phase control mechanism of Huygens nanoblocks is demonstrated, particularly the internal electromagnetic resonances and the manipulation of effective electrical/magnetic polarizabilities. Then, a group of high-transmission Si nanoblocks with 2π phase control is sought by sweeping the geometrical parameters. Finally, several metasurfaces, such as grating and parabolic lens, are numerically realized by the nanostructures with high efficiency. The conversion efficiency of the grating reaches 80%, and the focusing conversion efficiency of the metalens is 99.3%. The results show that the high-efficiency phase control metasurfaces can be realized based on aperiodic nanoarrays, i.e., additional design freedom.

High-Transmission Ultrathin Huygens’ Metasurface with 360° Phase Control by Using Double-Layer Transmitarray Elements

2019 ◽  
Vol 12 (2) ◽  
Author(s):  
Liang Wei Wu ◽  
Hui Feng Ma ◽  
Yue Gou ◽  
Rui Yuan Wu ◽  
Zheng Xing Wang ◽  
...  
Keyword(s):  
Double Layer ◽  
Phase Control ◽  
High Transmission

scholarly journals Dynamic phase-control of a rising sun magnetron using modulated and continuous current

2016 ◽  
Vol 119 (4) ◽  
pp. 044501 ◽  
Author(s):  
Sulmer Fernandez-Gutierrez ◽  
Jim Browning ◽  
Ming-Chieh Lin ◽  
David N. Smithe ◽  
Jack Watrous
Keyword(s):  
Phase Control ◽  
Dynamic Phase ◽  
Continuous Current

An all-digital phase-locked loop with dynamic phase control for fast locking

2012 ◽  
Author(s):  
Yun-Chen Chuang ◽  
Sung-Lin Tsai ◽  
Cheng-En Liu ◽  
Tsung-Hsien Lin
Keyword(s):  
Phase Locked Loop ◽  
Phase Control ◽  
Digital Phase ◽  
Dynamic Phase
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