scholarly journals Numerical Study of a Polarization Selective Visual Optical Switch

2020 ◽  
Vol 10 (15) ◽  
pp. 5246
Author(s):  
Kui Wen ◽  
Zhaojian Zhang ◽  
Xinpeng Jiang ◽  
Jie He ◽  
Junbo Yang
Keyword(s):  
Visible Light ◽  
Physical Mechanism ◽  
Numerical Study ◽  
Optical Switch ◽  
Incident Light ◽  
Contrast Ratio ◽  
Resonance Peak ◽  
Structural Color ◽  
Subwavelength Structure ◽  
Visible Light Range

The subwavelength structure based on metamaterial has been widely used in the application of structure color due to its unique characteristics. Here, a composite structure consisting of a circular hole and different number of metal strips is proposed. By changing the polarization direction of the incident light, the resonance peak in the visible light range shifts, and the material presents different colors. At the same time, take advantage of the shift of the resonance peak, a plasmonic optical switch, of which on/off states can be indicated by the structural color, is constructed, and the maximum contrast ratio is more than 20 dB. In addition, by means of changing the geometric parameters and materials of the metal strip, the colors presented basically cover the whole visible light range. This method theoretically proves the feasibility of using subwavelength structure to construct visual plasmonic optical switch using structural color in the visible light range, which provides a broad prospect for the application of multiple physical mechanism in nanostructure design.

Theoretical insight into the CdS/FAPbI3 heterostructure: a promising visible-light absorber

2021 ◽  
Author(s):  
Junli Chang ◽  
Liping Jiang ◽  
Guangzhao Wang ◽  
Yuhong Huang ◽  
Hong Chen
Keyword(s):  
Optical Absorption ◽  
Visible Light ◽  
Visible Light Range ◽  
Light Absorber ◽  
Absorption Performance ◽  
Theoretical Insight ◽  
Insight Into

The optical absorption performance of the perovskite FAPbI3 in the visible-light range is significantly improved by constructing a CdS/FAPbI3 heterostructure.

Synthesis of single-crystalline GeS nanoribbons for high sensitivity visible-light photodetectors

2015 ◽  
Vol 3 (31) ◽  
pp. 8074-8079 ◽  
Author(s):  
Changyong Lan ◽  
Chun Li ◽  
Yi Yin ◽  
Huayang Guo ◽  
Shuai Wang
Keyword(s):  
Visible Light ◽  
Vapor Deposition ◽  
High Performance ◽  
Incident Light ◽  
Chemical Vapor ◽  
High Sensitivity ◽  
Single Crystalline ◽  
Promising Application ◽  
Photo Detection ◽  
First Time

Single-crystalline GeS nanoribbons were synthesized by chemical vapor deposition for the first time. The nanoribbon photodetectors respond to the entire visible incident light with a response edge at around 750 nm and a high responsivity, indicating their promising application for high performance broadband visible-light photo-detection.

Structural reconstruction and visible-light absorption versus internal electrostatic field in two-dimensional GaN-ZnO alloys

Nanoscale ◽  
2021 ◽  
Author(s):  
Hanpu Liang ◽  
Yifeng Duan
Keyword(s):  
Visible Light ◽  
Electrostatic Field ◽  
Light Absorption ◽  
Red Shift ◽  
Two Dimensional ◽  
Visible Light Absorption ◽  
Visible Light Range ◽  
Optoelectronic Applications

GaN-ZnO alloys are more promising semiconductors than their counterparts for optoelectronic applications due to the abrupt red shift in the visible-light range. Unfortunately, the strong internal electrostatic field (IEF) seriously...

Photoresponsive and Ultraviolet to Visible-Light Range Photocatalytic Properties of ZnO:Sb Nanowires

2011 ◽  
Vol 158 (1) ◽  
pp. K6 ◽  
Author(s):  
Jyh Ming Wu ◽  
Chiung-Wan Fang ◽  
Lin-Tsang Lee ◽  
Hsin-Hsien Yeh ◽  
Yu-Hung Lin ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Properties ◽  
Visible Light Range

scholarly journals Graphene-Assisted Goos–Hänchen Shift in a Planar Multilayer Configuration in the Visible Light Range

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Wei Lin ◽  
Zhichen Xiao ◽  
Wenyun Zhou ◽  
Mengjiao Ren ◽  
Zhiwei Zheng
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Fermi Energy ◽  
Optical Sensing ◽  
Optical Beam ◽  
The Novel ◽  
Incident Wavelength ◽  
Visible Light Range

In this paper, the graphene-assisted Goos–Hänchen (GH) shift of the optical beam reflected from a planar multilayer configuration is investigated. The increased positive Goos–Hänchen shifts can be modulated by adjusting the Fermi energy due to graphene with unique optical properties in the visible light range. Moreover, the GH shift can be tuned by varying the layers of graphene, the thickness of the medium, incident wavelength, and so on. These results will be useful for designing the novel graphene-based optical sensing and switching.

High contrast ratio ultraviolet electro-optical switch

2013 ◽  
Vol 25 (3) ◽  
pp. 561-564
Author(s):  
胡云 Hu Yun ◽  
赵学庆 Zhao Xueqing ◽  
薛全喜 Xue Quanxi ◽  
华恒祺 Hua Hengqi ◽  
王大辉 Wang Dahui ◽  
...  
Keyword(s):  
Optical Switch ◽  
Contrast Ratio ◽  
High Contrast

scholarly journals Numerical Study of Multilayer Planar Film Structures for Ideal Absorption in the Entire Solar Spectrum

2020 ◽  
Vol 10 (9) ◽  
pp. 3276 ◽  
Author(s):  
Wei Chen ◽  
Jing Liu ◽  
Wen-Zhuang Ma ◽  
Gao-Xiang Yu ◽  
Jing-Qian Chen ◽  
...  
Keyword(s):  
Noble Metals ◽  
Numerical Study ◽  
Incident Light ◽  
Solar Spectrum ◽  
Fdtd Simulation ◽  
Polarization Angle ◽  
Solar Absorber ◽  
Solar Energy Harvesting ◽  
Planar Film ◽  
Planar Films

Here, we have theoretically proposed an ideal structure of selective solar absorber with multilayer planar films, which can absorb the incident light throughout the entire solar spectrum (300–2500 nm) and over a wide angular range, whatever the polarization angle of 0°~90°. The efficiency of the proposed absorber is proven by the Finite-Difference Time Domain (FDTD) simulation. The average absorption rate over the solar spectrum is up to 96.6%. The planar design is extremely easy to fabricate and modify, and this structure does not require lithographic processes to finish the absorbers. Improvements of the solar absorber on the basis of planar multilayer-film structures is attributed to multiple asymmetric highly lossy Fabry–Perot resonators. Because of having many virtues, such as using different refractory and non-noble metals, having angle and polarization independence, and having ideal absorption for entire solar spectrum, our proposed absorbers are promising candidates for practical industrial production of the solar-energy harvesting.

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