A refractory metamaterial absorber for ultra-broadband, omnidirectional and polarization-independent absorption in the UV-NIR spectrum

被引：159

作者：

Huang, Yijia ^{[1
,2
]}

Liu, Ling ^{[1
,2
]}

Pu, Mingbo ^{[1
]}

Li, Xiong ^{[1
]}

Ma, Xiaoliang ^{[1
]}

Luo, Xiangang ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Optic & Elect, State Key Lab Opt Technol Nanofabricat & Microeng, POB 350, Chengdu 610209, Sichuan, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

NANOSCALE | 2018年 / 10卷 / 17期

基金：

中国国家自然科学基金;

关键词：

PERFECT ABSORBER; SURFACE; ULTRABROADBAND; PLASMONICS;

D O I：

10.1039/c8nr01728j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, efficient ultra-broadband absorption from ultraviolet (UV) to near infrared (NIR) is achieved using a metamaterial perfect absorber (MPA) with refractory constituents. Both simulated and experimental results indicate that this proposed MPA exhibits an average absorption over 95% at wavelengths ranging from 200 nm to 900 nm. Besides, owing to the ultrathin thickness and symmetrical topology of this device, it exhibits great angular tolerance up to 60 degrees independent of the incident polarizations. Excellent thermal stability is also demonstrated at high operation temperatures. The physical origin of the ultra-broadband characteristics is mainly based on diffraction/interference engineering at short wavelengths and the anti-reflection effect at long wavelengths. We believe that such a device may find potential applications ranging from photodetection and photothermal energy conversion to ultraviolet protection and thermophotovoltaics.

引用

页码：8298 / 8303

页数：6