Tailoring Metal and Insulator Contributions in Plasmonic Perfect Absorber Metasurfaces

被引：38

作者：

Nishijima, Yoshiaki ^{[1
]}

Balcytis, Armandas ^{[2
,3
]}

Naganuma, Shin ^{[1
]}

Seniutinas, Gediminas ^{[2
,5
]}

Juodkazis, Saulius ^{[2
,4
]}

机构：

[1] Yokohama Natl Univ, Grad Sch Engn, Dept Phys Elect & Comp Engn, Hodogaya Ku, 79-5 Tokiwadai, Yokohama, Kanagawa 2408501, Japan

[2] Swinburne Univ Technol, Fac Sci Engn & Technol, Ctr Microphoton, Hawthorn, Vic 3122, Australia

[3] Ctr Phys Sci & Technol, A Gostauto 9, LT-01108 Vilnius, Lithuania

[4] ANFF, Melbourne Ctr Nanofabricat, 151 Wellington Rd, Clayton, Vic 3168, Australia

[5] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

ACS APPLIED NANO MATERIALS | 2018年 / 1卷 / 07期

基金：

日本学术振兴会; 澳大利亚研究理事会;

关键词：

plasmonic perfect absorber; metal and insulator contributions; mid-infrared; metasurface; metamaterial; PHOTOTHERMAL THERAPY; THERMAL-RADIATION; GOLD; ABSORPTION; RANGE; MODES;

D O I：

10.1021/acsanm.8b00710

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Maximum absorption of light using plasmonic perfect absorbers (PPAs) is highly desired in the field of energy harvesting, sensing, as well as photothermal light sources. We reveal how optical properties of several popular metals (Au, Ag, Cu, Pd) and insulators (SiO2, Si, ZnO) affect performance of PPAs at mid-infrared (IR) wavelengths. At this wavelength range radiation properties of a plasmonic system are also linked to its thermal conductivity; hence, in this work thinner insulator layers around 10 nm in thickness are given special focus. Optical properties of experimentally prepared (by plasma sputtering) structures follow expected scalings; however, departure from the finite-difference time-domain (FDTD) simulations is significant when roughness of the first metal base layer is not taken into account. Electrical conductivity is shown to strongly affect performance of PPAs. Absorbance values above 90% were attained for nanodisc array based PPA structures with a 10 nm thick insulator spacer.

引用

页码：3557 / 3564

页数：15

共 38 条

[1] Towards CMOS-compatible nanophotonics: Ultra-compact modulators using alternative plasmonic materials [J].