Indium Antimonide-Based All-Dielectric Metasurface Absorber at Terahertz Frequency for Refractive Index Sensing Applications

被引：0

作者：

Thomas, Sherin ^{[1
]}

Shenoy, K. Adithi ^{[1
]}

Satyanarayan, M. N. ^{[1
]}

机构：

[1] Natl Inst Technol Karnataka, Dept Phys, Mangaluru 575025, India

来源：

IEEE SENSORS JOURNAL | 2024年 / 24卷 / 21期

关键词：

Dual band; perfect metasurface absorbers (PMAs); refractive index sensor; ring resonator; terahertz frequency; PERFECT ABSORBER;

D O I：

10.1109/JSEN.2024.3411145

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this article, we present an indium antimonide (InSb)-based metasurface absorber (MA) using a complementary ring structure. The proposed MA exhibits absorption characteristics in the terahertz frequency range spanning from 1.0 to 2.2 THz. Within this frequency range, the MA demonstrates dual-band tunability, achieving approximately 100% absorption. Geometric parameters such as the outer ring radii, ring width, and InSb layer thickness are systematically adjusted to fine-tune the absorption frequency of the MA. In addition, we explore the refractive index sensing capabilities by introducing different refractive index materials into the air-filled complementary ring cavity. Notably, we achieve a peak refractive index sensitivity of 555 GHz per refractive index unit (RIU) for the first absorption peak at a minimum radius of 60 mu m.

引用

页码：34251 / 34258

页数：8

共 41 条

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