scholarly journals Biosensing on a Plasmonic Dual-Band Perfect Absorber Using Intersection Nanostructure

ACS Omega ◽  
2021 ◽  
Author(s):  
Chung-Ting Chou Chao ◽  
Yuan-Fong Chou Chau ◽  
Hai-Pang Chiang
Keyword(s):  
Dual Band ◽  
Perfect Absorber

Graphene-based dual-band tunable perfect absorber in THz range

2021 ◽  
Vol 68 (2) ◽  
pp. 93-99
Author(s):  
Zhaoyang Liu ◽  
Jian Li ◽  
Lingjuan He ◽  
Tianbao Yu
Keyword(s):  
Dual Band ◽  
Perfect Absorber ◽  
Thz Range

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 Dual-band tunable perfect absorber based on monolayer graphene pattern

2020 ◽  
Vol 18 ◽  
pp. 103306 ◽  
Author(s):  
Rujiao Ke ◽  
Wen Liu ◽  
Jinping Tian ◽  
Rongcao Yang ◽  
Weihua Pei
Keyword(s):  
Dual Band ◽  
Monolayer Graphene ◽  
Perfect Absorber

scholarly journals Perfect Dual-Band Absorber Based on Plasmonic Effect with the Cross-Hair/Nanorod Combination

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 493 ◽  
Author(s):  
Yuan-Fong Chou Chau ◽  
Chung-Ting Chou Chao ◽  
Hung Ji Huang ◽  
Muhammad Raziq Rahimi Kooh ◽  
N. T. R. N. Kumara ◽  
...  
Keyword(s):  
Figure Of Merit ◽  
Near Infrared ◽  
High Sensitivity ◽  
Dual Band ◽  
Localized Surface Plasmon ◽  
Perfect Absorber ◽  
Plasmonic Effect ◽  
Plasmonic Sensor ◽  
Nanophotonic Devices ◽  
The Cross

Plasmonic effect using a cross-hair can convey strongly localized surface plasmon modes among the separated composite nanostructures. Compared to its counterpart without the cross-hair, this characteristic has the remarkable merit of enhancing absorptance at resonance and can make the structure carry out a dual-band plasmonic perfect absorber (PPA). In this paper, we propose and design a novel dual-band PPA with a gathering of four metal-shell nanorods using a cross-hair operating at visible and near-infrared regions. Two absorptance peaks at 1050 nm and 750 nm with maximal absorptance of 99.59% and 99.89% for modes 1 and 2, respectively, are detected. High sensitivity of 1200 nm refractive unit (1/RIU), figure of merit of 26.67 and Q factor of 23.33 are acquired, which are very remarkable compared with the other PPAs. In addition, the absorptance in mode 1 is about nine times compared to its counterpart without the cross-hair. The proposed structure gives a novel inspiration for the design of a tunable dual-band PPA, which can be exploited for plasmonic sensor and other nanophotonic devices.

scholarly journals Dual-band infrared perfect absorber based on asymmetric T-shaped plasmonic array

2014 ◽  
Vol 22 (S2) ◽  
pp. A335 ◽  
Author(s):  
Rui Feng ◽  
Weiqiang Ding ◽  
Linhua Liu ◽  
Lixue Chen ◽  
Jun Qiu ◽  
...  
Keyword(s):  
Dual Band ◽  
Perfect Absorber
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