Tunable ultra-narrowband and wide-angle graphene-based perfect absorber in the optical communication region

2018 ◽  
Vol 11 (10) ◽  
pp. 105102 ◽  
Author(s):  
Xin Luo ◽  
Zhimin Liu ◽  
Lingling Wang ◽  
Jianping Liu ◽  
Qi Lin
Keyword(s):  
Optical Communication ◽  
Perfect Absorber ◽  
Wide Angle

scholarly journals Hybrid Metamaterials Perfect Absorber and Sensitive Sensor in Optical Communication Band

2021 ◽  
Vol 9 ◽  
Author(s):  
Xuehan Liu ◽  
Keyang Li ◽  
Zhao Meng ◽  
Zhun Zhang ◽  
Zhongchao Wei
Keyword(s):  
Optical Communication ◽  
Electromagnetic Waves ◽  
Incident Angle ◽  
Silicon Layer ◽  
Resonance Wavelength ◽  
Metamaterial Absorber ◽  
Absorption Peak ◽  
Dual Band ◽  
Perfect Absorber ◽  
Perfect Absorption

A subwavelength metamaterial perfect absorber (MPA) in optical communication band was proposed and tested using the finite-difference time-domain method. The absorber is periodic and comprises a top layer of diamond silicon surrounded by L-shaped silicon and a gold layer on the substrate. It can achieve dual-band perfect absorption, and one of the peaks is in the optical communication band. By changing the gap (g) between two adjacent pieces of L-shaped silicon, and the thickness (h) of the silicon layer, the resonance wavelength of absorption peak can be tuned. When the incident electromagnetic wave entered the absorber, the metamaterial absorber could almost completely consume the incident electromagnetic waves, thereby achieving more than 99% perfect absorption. The absorption peak reaches 99.986% at 1310 nm and 99.421% at 1550 nm. Moreover, the MPA exposed to different ambient refraction indexes can be applied as plasma sensors, and can achieve multi-channel absorption with high figure of merit (FOM*) value and refractive index (RI) sensitivity. The FOM* values at 1310 nm and 1550 nm are 6615 and 168, respectively, and both resonance peaks have highly RI sensitivity. The results confirm that the MPA is a dual-band, polarization-independent, wide-angle absorber and insensitive to incident angle. Thence it can be applied in the fields of optical communication, used as a light-wave filter and plasma sensor, and so on.

scholarly journals Research on Perfect and Tunable Metamaterial Absorber Based on Crosshair-shaped Graphene

2021 ◽  
Vol 2109 (1) ◽  
pp. 012015
Author(s):  
Yiran Guo ◽  
Yunping Qi ◽  
Chuqin Liu ◽  
Weiming Liu ◽  
Xiangxian Wang
Keyword(s):  
Relaxation Time ◽  
Chemical Potential ◽  
Incident Angle ◽  
Fdtd Method ◽  
Reference Value ◽  
Metamaterial Absorber ◽  
Selective Absorption ◽  
Perfect Absorber ◽  
Wide Angle ◽  
Perfect Absorption

Abstract Graphene, as a new nano-material, according to the physical properties of electric field localization and selective absorption on light of surface plasmon resonance (SPR), a tunable, multi-band and wide-angle perfect absorber based on crosshair-shaped graphene is devised by using the Finite Difference in Time Domain (FDTD) method. In this paper, the effects of chemical potential, relaxation time, and incident angle of light on the absorptivity of graphene are systematically discussed. The simulation experiment shows that there are two absorption peaks with perfect absorption rate appeared in the study range, and the maximum modulation index can be obtained by changing the relaxation time. Finally, it proves that the absorber is insensitive to wide-angle of light. Thus, it is able to be concluded that the absorber has a great reference value to sensor, wireless communication, biomedical and other fields.

Wide-Angle and Polarization-Insensitive Perfect Absorber for Organic Photovoltaic Layers

2013 ◽  
Vol 25 (13) ◽  
pp. 1266-1269 ◽  
Author(s):  
Kai Liu ◽  
Haifeng Hu ◽  
Haomin Song ◽  
Xie Zeng ◽  
Dengxin Ji ◽  
...  
Keyword(s):  
Organic Photovoltaic ◽  
Perfect Absorber ◽  
Wide Angle ◽  
Polarization Insensitive

scholarly journals Wide-angle Spectrally Selective Perfect Absorber by Utilizing Dispersionless Tamm Plasmon Polaritons

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Chun-hua Xue ◽  
Feng Wu ◽  
Hai-tao Jiang ◽  
Yunhui Li ◽  
Ye-wen Zhang ◽  
...  
Keyword(s):  
Perfect Absorber ◽  
Wide Angle ◽  
Spectrally Selective ◽  
Plasmon Polaritons

scholarly journals Design principles for infrared wide-angle perfect absorber based on plasmonic structure

2011 ◽  
Vol 19 (18) ◽  
pp. 17413 ◽  
Author(s):  
Mingbo Pu ◽  
Chenggang Hu ◽  
Min Wang ◽  
Cheng Huang ◽  
Zeyu Zhao ◽  
...  
Keyword(s):  
Design Principles ◽  
Perfect Absorber ◽  
Wide Angle ◽  
Plasmonic Structure

Wide-Angle Near-Perfect Absorber Based on Sub-Wavelength Dielectric Grating Covered by Continuous Thin Aluminum Film

Plasmonics ◽  
2016 ◽  
Vol 12 (2) ◽  
pp. 339-343 ◽  
Author(s):  
Minghui Luo ◽  
Su Shen ◽  
Yan Ye ◽  
Yanhua Liu ◽  
Yun Zhou ◽  
...  
Keyword(s):  
Aluminum Film ◽  
Perfect Absorber ◽  
Wide Angle ◽  
Dielectric Grating ◽  
Thin Aluminum ◽  
Sub Wavelength
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