Dual-Band Infrared Near-Perfect Absorption by Fabry-Perot Resonances and Surface Phonons

被引：14

作者：

Wu, Jipeng ^{[1
,2
]}

Guo, Jun ^{[1
]}

Wang, Xi ^{[1
]}

Jiang, Leyong ^{[1
]}

Dai, Xiaoyu ^{[1
]}

Xiang, Yuanjiang ^{[1
,2
]}

Wen, Shuangchun ^{[2
]}

机构：

[1] Shenzhen Univ, SZU NUS Collaborat Innovat Ctr Optoelect Sci & Te, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov,Coll Optoelect Engn, Shenzhen 518060, Peoples R China

[2] Hunan Univ, Sch Phys & Elect, Minist Educ, Key Lab Micro Nanooptoelect Devices, Changsha 410082, Hunan, Peoples R China

来源：

PLASMONICS | 2018年 / 13卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Infrared; Absorption; Fabry-Perot; Thin films; HEXAGONAL BORON-NITRIDE; POLARITONS; GRAPHENE; ABSORBER; METAMATERIALS; LIGHT;

D O I：

10.1007/s11468-017-0575-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this article, we present a simple absorber design which enables dual-band near-perfect absorption at infrared (IR) frequencies. The absorber is an unpatterned hBN/dielectric/hBN triple layer, with a 1150-nm-thick hBN film as the top layer, a 850-nm-thick dielectric film as the middle layer, and a hBN substrate. Unlike the metal/dielectric/metal triple layer, it is found that the high efficiency absorption at specific wavelengths is mainly mused by two mechanisms: Fabry-Perot (FP) resonances and surface phonons. The absorption response is found sensitive to the top and middle layers. The two mechanisms can be coupled to affect the absorption spectra by choosing a proper thickness of the top and middle layers.

引用

页码：803 / 809

页数：7

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