A Tunable Metamaterial Absorber Based on Liquid Crystal with the Compact Unit cell and the Wideband Absorption

This paper introduces a tunable metamaterial absorber (MA) based on polymer network liquid crystal (PNLC) in the terahertz (THz) frequency band. Under the optimal polymerization condition, through electrical control of the orientation of the PNLC embedded in the frequency selective surface, the resonant frequency of the absorber can be tuned from 416.5 to 405.0 GHz, corresponding to fractional frequency bandwidth of 2.8%. The experimental results show that the proposed MA based on the PNLC offers an adjustment time of 10 ms and recovery time of 85 ms, which is significantly faster than the tunable metamaterial devices based on conventional nematic liquid crystal (LC).

Download Full-text

A Tunable Metamaterial Absorber Based on Liquid Crystal Intended for F Frequency Band

IEEE Antennas and Wireless Propagation Letters ◽

10.1109/lawp.2017.2695617 ◽

2017 ◽

Vol 16 ◽

pp. 2062-2065 ◽

Cited By ~ 6

Author(s):

Guangsheng Deng ◽

Tianyu Xia ◽

Shuaicheng Jing ◽

Jun Yang ◽

Hongbo Lu ◽

...

Keyword(s):

Liquid Crystal ◽

Frequency Band ◽

Metamaterial Absorber ◽

Tunable Metamaterial

Download Full-text

Liquid crystal-tunable metamaterial absorber for THz frequency range

2013 7th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics ◽

10.1109/metamaterials.2013.6808992 ◽

2013 ◽

Cited By ~ 3

Author(s):

B. Grzeskiewicz ◽

E. Wolarz ◽

A. Sierakowski ◽

J. Marczewski ◽

N. Palka

Keyword(s):

Liquid Crystal ◽

Metamaterial Absorber ◽

Frequency Range ◽

Tunable Metamaterial

Download Full-text

Liquid Crystal Tunable Metamaterial Absorber

Physical Review Letters ◽

10.1103/physrevlett.110.177403 ◽

2013 ◽

Vol 110 (17) ◽

Cited By ~ 308

Author(s):

David Shrekenhamer ◽

Wen-Chen Chen ◽

Willie J. Padilla

Keyword(s):

Liquid Crystal ◽

Metamaterial Absorber ◽

Tunable Metamaterial

Download Full-text

Independently Tunable Multipurpose Absorber with Single Layer of Metal-Graphene Metamaterials

Materials ◽

10.3390/ma14020284 ◽

2021 ◽

Vol 14 (2) ◽

pp. 284

Author(s):

Chen Han ◽

Renbin Zhong ◽

Zekun Liang ◽

Long Yang ◽

Zheng Fang ◽

...

Keyword(s):

Energy Harvesting ◽

Fermi Level ◽

Potential Application ◽

Single Layer ◽

Wide Band ◽

Metamaterial Absorber ◽

Unit Cell ◽

Perfect Absorption ◽

Solar Energy Harvesting ◽

Band Absorption

This paper reports an independently tunable graphene-based metamaterial absorber (GMA) designed by etching two cascaded resonators with dissimilar sizes in the unit cell. Two perfect absorption peaks were obtained at 6.94 and 10.68 μm with simple single-layer metal-graphene metamaterials; the peaks show absorption values higher than 99%. The mechanism of absorption was analyzed theoretically. The independent tunability of the metamaterial absorber (MA) was realized by varying the Fermi level of graphene under a set of resonators. Furthermore, multi-band and wide-band absorption were observed by the proposed structure upon increasing the number of resonators and resizing them in the unit cell. The obtained results demonstrate the multipurpose performance of this type of absorber and indicate its potential application in diverse applications, such as solar energy harvesting and thermal absorbing.

Download Full-text