Mid-wave and long-wave infrared dual-band stacked metamaterial absorber for broadband with high refractive index sensitivity

2020 ◽  
Vol 59 (9) ◽  
pp. 2695 ◽  
Author(s):  
Enzhu Hou ◽  
Dejia Meng ◽  
Zhongzhu Liang ◽  
Ying Xiong ◽  
Fuming Yang ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Metamaterial Absorber ◽  
Dual Band ◽  
Refractive Index Sensitivity ◽  
Long Wave ◽  
Index Sensitivity ◽  
Long Wave Infrared

scholarly journals A Tunable “Ancient Coin”-Type Perfect Absorber with High Refractive Index Sensitivity and Good Angular Polarization Tolerance

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 814
Author(s):  
Hao Luo ◽  
Qianyi Shangguan ◽  
Yinting Yi ◽  
Shubo Cheng ◽  
Yougen Yi ◽  
...  
Keyword(s):  
Refractive Index ◽  
Graphene Layer ◽  
High Refractive Index ◽  
Dual Band ◽  
Polarization Angle ◽  
Perfect Absorber ◽  
Refractive Index Sensitivity ◽  
Absorption Performance ◽  
Ancient Coin ◽  
Index Sensitivity

In this paper, we design and present a graphene-based “ancient coin”-type dual-band perfect metamaterial absorber, which is composed of a silver layer, silicon dioxide layer, and a top “ancient coin” graphene layer. The absorption performance of the absorber is affected by the hollowed-out square in the center of the graphene layer and geometric parameters of the remaining nano disk. The optical properties of graphene can be changed by adjusting the voltage, to control the absorption performance of the absorber dynamically. In addition, the centrally symmetric pattern structure greatly eliminates the polarization angle dependence of our proposed absorber, and it exhibits good angular polarization tolerance. Furthermore, the proposed “ancient coin”-type absorber shows great application potential as a sensor or detector in biopharmaceutical, optical imaging, and other fields due to its strong tunability and high refractive index sensitivity.

scholarly journals Miniature highly-birefringent microfiber loop with extremely-high refractive index sensitivity

2012 ◽  
Vol 20 (9) ◽  
pp. 10180 ◽  
Author(s):  
Lipeng Sun ◽  
Jie Li ◽  
Yanzhen Tan ◽  
Xiang Shen ◽  
Xiaodong Xie ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Refractive Index Sensitivity ◽  
Index Sensitivity

Cladding mode reorganization in high-refractive-index-coated long-period gratings: effects on the refractive-index sensitivity

2005 ◽  
Vol 30 (19) ◽  
pp. 2536 ◽  
Author(s):  
Andrea Cusano ◽  
Agostino Iadicicco ◽  
Pierluigi Pilla ◽  
Luigi Contessa ◽  
Stefania Campopiano ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Refractive Index Sensitivity ◽  
Long Period ◽  
Long Period Gratings ◽  
Cladding Mode ◽  
Index Sensitivity

scholarly journals The Study of Midinfrared Extremely Narrow Dual-Band Absorber Based on a Novel Metamaterial Structure

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Zichun Li ◽  
Jinhua Li ◽  
Ye Zhang ◽  
Yingjiao Zhai ◽  
Xueying Chu ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Metamaterial Absorber ◽  
Dual Band ◽  
Metamaterial Structure ◽  
Refractive Index Sensitivity ◽  
Perfect Absorption ◽  
Metal Pattern ◽  
Pattern Layer ◽  
Index Sensitivity ◽  
20 Nm

Due to the problems that the metal pattern layer on the top of the traditional metamaterial structure is easy to be oxidized and easy to fall off, in this paper, a novel semiconductor metamaterial nanostructure composed of a periodic array of GaAs-SiO2 cubes and a gold (Au) film has been proposed. Using FDTD solutions software to prove this metamaterial structure can achieve ultranarrow dual-band, nearly perfect absorption with a maximum absorbance of 99% and a full-width at half-maximum (FWHM) value that is less than 20 nm in the midinfrared region. The refractive index sensitivity is demonstrated by changing the background index and analyzing the absorption performance. It had been proved that this absorber has high sensitivity (2000/RIU and 1300/RIU). Using semiconductor material instead of the metal material of the top pattern layer can effectively inhibit the performance failure of the metamaterial structure caused by metal oxidation. The proposed narrow, dual-band metamaterial absorber shows promising prospects in applications such as infrared detection and imaging.

(Gold triangular nanoplate core)@(silver shell) nanostructures as highly sensitive and selective plasmonic nanoprobes for hydrogen sulfide detection

Nanoscale ◽  
2020 ◽  
Vol 12 (39) ◽  
pp. 20250-20257 ◽  
Author(s):  
Hua Mi ◽  
Shengyan Wang ◽  
Hang Yin ◽  
Le Wang ◽  
Lin Mei ◽  
...  
Keyword(s):  
Refractive Index ◽  
Hydrogen Sulfide ◽  
High Refractive Index ◽  
Great Sensitivity ◽  
Refractive Index Sensitivity ◽  
Shell Nanostructures ◽  
Highly Sensitive ◽  
Index Sensitivity ◽  
Silver Shell

AuTNP@Ag nanostructures are developed as nanoprobes for hydrogen sulfide. Owing to the high refractive index sensitivity of Au TNPs and facile sulfurization of silver, AuTNP@Ag nanostructures exhibit great sensitivity to both sulfur ions and H2S gas.

Characterisation of a Gold Nanorod Sol–Gel Utilising Inter-particle Coupling to Yield High Refractive Index Sensitivity

Plasmonics ◽  
2011 ◽  
Vol 7 (2) ◽  
pp. 331-339
Author(s):  
Philip J. R. Roche ◽  
Maurice Cha-Kiu Cheung ◽  
Sandrine Filion-Côté ◽  
Jonathan Milette ◽  
Timothy Gonzalez ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
High Refractive Index ◽  
Gold Nanorod ◽  
Refractive Index Sensitivity ◽  
Index Sensitivity

A four-band and polarization-independent BDS-based tunable absorber with high refractive index sensitivity

2021 ◽  
Author(s):  
Xianglong Wu ◽  
Ying Zheng ◽  
Yao Luo ◽  
Jianguo Zhang ◽  
Zao Yi ◽  
...  
Keyword(s):  
Refractive Index ◽  
Narrow Band ◽  
Layer Structure ◽  
High Refractive Index ◽  
Perfect Absorber ◽  
Refractive Index Sensitivity ◽  
Tunable Absorber ◽  
Index Sensitivity ◽  
Polarization Independent

A four-band terahertz tunable narrow-band perfect absorber based on Bulk Dirac semi-metallic (BDS) metamaterial with microstructure is designed. The three-layer structure of this absorber from top to bottom is the...

Fully suspended slot waveguides for high refractive index sensitivity

2017 ◽  
Vol 42 (7) ◽  
pp. 1245 ◽  
Author(s):  
Wen Zhou ◽  
Zhenzhou Cheng ◽  
Xinru Wu ◽  
Bingqing Zhu ◽  
Xiankai Sun ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Refractive Index Sensitivity ◽  
Index Sensitivity ◽  
Slot Waveguides
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