scholarly journals Mutual Circular Polarization Conversions in Asymmetric Transmission and Reflection Modes by Three-Layer Metasurface with Gold Split-Rings

2021 ◽  
Author(s):  
Zhe Shen ◽  
Quan He
Keyword(s):  
Circular Polarization ◽  
Asymmetric Transmission ◽  
Transmission And Reflection

scholarly journals Polarization-dependent asymmetric transmission using a bifacial metasurface

2020 ◽  
Vol 5 (11) ◽  
pp. 1487-1495
Author(s):  
Jangwoon Sung ◽  
Gun-Yeal Lee ◽  
Chulsoo Choi ◽  
Jongwoo Hong ◽  
Byoungho Lee
Keyword(s):  
Asymmetric Transmission ◽  
Arbitrary Polarization ◽  
Transmission And Reflection

Using linearly birefringent structure and induced transmission, asymmetric transmission with arbitrary polarization pair has been realized through metasurfaces, with impartment of two different phases into transmission and reflection space.

Tunable circular polarization conversion and asymmetric transmission of planar chiral graphene-metamaterial in terahertz region

Carbon ◽  
2017 ◽  
Vol 119 ◽  
pp. 305-313 ◽  
Author(s):  
Yuanyuan Huang ◽  
Zehan Yao ◽  
Fangrong Hu ◽  
Changji Liu ◽  
Leilei Yu ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Polarization Conversion ◽  
Asymmetric Transmission ◽  
Terahertz Region

scholarly journals Asymmetric transmission and reflection spectra of FBG in single-multi-single mode fiber structure

2015 ◽  
Vol 23 (9) ◽  
pp. 11665 ◽  
Author(s):  
Quan Chai ◽  
Yanlei Liu ◽  
Jianzhong Zhang ◽  
Jun Yang ◽  
Yujin Chen ◽  
...  
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Reflection Spectra ◽  
Fiber Structure ◽  
Asymmetric Transmission ◽  
Transmission And Reflection Spectra ◽  
Transmission And Reflection

Giant asymmetric transmission of circular polarization in layer-by-layer chiral metamaterials

2013 ◽  
Vol 103 (2) ◽  
pp. 021903 ◽  
Author(s):  
Lin Wu ◽  
Zhenyu Yang ◽  
Yongzhi Cheng ◽  
Ming Zhao ◽  
Rongzhou Gong ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Layer By Layer ◽  
Asymmetric Transmission ◽  
Chiral Metamaterials

scholarly journals Terahertz Metamaterial Modulator Based on Phase Change Material VO2

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2230
Author(s):  
Yanfei Dong ◽  
Dingwang Yu ◽  
Gaosheng Li ◽  
Mingtuan Lin ◽  
Li-An Bian
Keyword(s):  
Frequency Selective Surface ◽  
Asymmetric Transmission ◽  
Dynamic Modulation ◽  
Terahertz Detection ◽  
New Type ◽  
Absorption Performance ◽  
Surface Electric Field ◽  
Bifunctional Properties ◽  
Change Material ◽  
Transmission And Reflection

In this paper, a new type of terahertz (THz) metamaterial (MM) modulator has been presented with bifunctional properties based on vanadium dioxide (VO2). The design consists of a VO2 resonator, polyimide substrate, frequency selective surface (FSS) layer, and VO2 film. Based on the metal-insulator transition (MIT) of VO2, this structure integrated with VO2 material can achieve the dynamic modulation on both transmission and reflection waves at 2.5 THz by varying the electrical conductivity value of VO2. Meanwhile, it also exhibits adjustable absorption performance across the whole band from 0.5–7 THz. At the lower conductivity (σ = 25 S/m), this structure can act as a bandpass FSS, and, at the high conductivity (σ = 2 × 105 S/m), it behaves like a wideband absorber covering 2.52–6.06 THz with absorption A > 0.9, which realizes asymmetric transmission. The surface electric field distributions are illustrated to provide some insight into the physical mechanism of dynamic modulation. From the simulated results, it can be observed that this design has the capability of controlling tunable manipulation on both transmission/reflection responses at a wide frequency band. This proposed design may pave a novel pathway towards thermal imaging, terahertz detection, active modulators, etc.

Atomic-level imaging of the surface structure of Ag2O

1984 ◽  
Vol 42 ◽  
pp. 656-657
Author(s):  
William Krakow
Keyword(s):  
High Vacuum ◽  
Atomic Level ◽  
Ultra High Vacuum ◽  
Research Groups ◽  
Resolution Electron ◽  
Surface Reconstructions ◽  
Order Of Magnitude ◽  
High Resolution Electron Microscope ◽  
Saturated Structure ◽  
Transmission And Reflection

In recent years electron microscopy has been used to image surfaces in both the transmission and reflection modes by many research groups. Some of this work has been performed under ultra high vacuum conditions (UHV) and apparent surface reconstructions observed. The level of resolution generally has been at least an order of magnitude worse than is necessary to visualize atoms directly and therefore the detailed atomic rearrangements of the surface are not known. The present author has achieved atomic level resolution under normal vacuum conditions of various Au surfaces. Unfortunately these samples were exposed to atmosphere and could not be cleaned in a standard high resolution electron microscope. The result obtained surfaces which were impurity stabilized and reveal the bulk lattice (1x1) type surface structures also encountered by other surface physics techniques under impure or overlayer contaminant conditions. It was therefore decided to study a system where exposure to air was unimportant by using a oxygen saturated structure, Ag2O, and seeking to find surface reconstructions, which will now be described.

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