Metal-insulator-metal strip spectroscopic infrared photothermal absorber based on uniaxially oriented plasmonic lanthanum hexaboride films

被引：4

作者：

Phuoc Toan Tran ^{[1
,2
]}

Thien Duc Ngo ^{[1
,2
]}

Ngo, Hai Dang ^{[1
,2
]}

Handegard, Orjan Sele ^{[1
,2
]}

Nagao, Tadaaki ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci NIMS, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 9876543, Japan

[2] Hokkaido Univ, Grad Sch Sci, Dept Condensed Matter Phys, Sapporo, Hokkaido 0600808, Japan

来源：

OPTICS EXPRESS | 2022年 / 30卷 / 21期

基金：

日本学术振兴会;

关键词：

ELECTRON-EMISSION CHARACTERISTICS; LAB6; THIN-FILMS; WORK-FUNCTION; LAYER;

D O I：

10.1364/OE.463522

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the fabrication of a mid-infrared device using LaB6 - Al2O3 - LaB6 trilayers, with an array of LaB6 strips as the top layer. Uniaxially oriented lanthanum hexaboride (LaB6) films self-organized in a (100) orientation were adopted together with a lithographic process using laser direct writing followed by reactive ion etching. The fabricated infrared absorbers based on our electromagnetic design exhibited excellent resonant absorption and flexible tunability by changing the periodicity and width of the top LaB6 strips. We examined the performance of epitaxial and sputtered LaB6 films by fabricating two different types of absorbers using sputtered LaB6(100) and epitaxial LaB6(100) films for the bottom mirror layers. Owing to a difference in crystallinity, the latter exhibited a lower background in the absorption spectra as well as in the thermal emission spectra, indicating its good spectral selectivity.

引用

页码：38630 / 38642

页数：13

共 36 条

[1] Lanthanum Hexaboride As Novel Inter layer for Improving the Thermal Stability of P3HT:PCBM Organic Solar Cells [J].