Hydrogen Sensing Using Thin-Film Perfect Light Absorber

被引：35

作者：

ElKabbash, Mohamed ^{[1
,2
]}

Sreekanth, Kandammathe, V ^{[1
]}

Alapan, Yunus ^{[3
]}

Kim, Myeongseop ^{[3
]}

Cole, Jonathan ^{[4
]}

Fraiwan, Arwa ^{[3
]}

Letsou, Theodore ^{[1
]}

Li, Yandong ^{[1
]}

Guo, Chunlei ^{[2
,5
]}

Sankaran, R. Mohan ^{[4
]}

Gurkan, Umut A. ^{[3
,6
,7
,8
]}

Hinczewski, Michael ^{[1
]}

Strangi, Giuseppe ^{[1
,9
,10
,11
]}

机构：

[1] Case Western Reserve Univ, Dept Phys, 10600 Euclid Ave, Cleveland, OH 44106 USA

[2] Univ Rochester, Inst Opt, Rochester, NY 14627 USA

[3] Case Western Reserve Univ, Mech & Aerosp Engn Dept, Case Biomfg & Microfabricat Lab, Cleveland, OH 44106 USA

[4] Case Western Reserve Univ, Dept Chem & Biomol Engn, Cleveland, OH 44106 USA

[5] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, GPL, State Key Lab Appl Opt, Changchun 130033, Jilin, Peoples R China

[6] Case Western Reserve Univ, Dept Biomed Engn, Cleveland, OH 44106 USA

[7] Case Western Reserve Univ, Dept Orthoped, Cleveland, OH 44106 USA

[8] Louis Stokes Cleveland Vet Affairs Med Ctr, Adv Platform Technol Ctr, Cleveland, OH 44106 USA

[9] Univ Calabria, Ist Nanotecnol, CNR NANOTEC, Arcavacata Di Rende, CS, Italy

[10] Univ Calabria, Dept Phys, Arcavacata Di Rende, CS, Italy

[11] Ist Italiano Tecnol, Via Morego 30, I-16163 Genoa, Italy

来源：

ACS PHOTONICS | 2019年 / 6卷 / 08期

基金：

美国国家科学基金会;

关键词：

thin films; Fabry-Perot cavity; interference; gas sensing; hydrogen sensing; nanophotonics; DIELECTRIC FUNCTION; ABSORPTION; PALLADIUM; INTERFERENCE; HYSTERESIS; BEHAVIOR; RANGE; MODEL;

D O I：

10.1021/acsphotonics.9b00764

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Hydrogen sensing is important in many industrial, biomedical, environmental, and energy applications. Realizing a practical, reliable, and inexpensive hydrogen sensor, however, is an ongoing challenge. Here, we demonstrate hydrogen sensing based on an optically active metal-dielectric-metal (MDM) perfect light absorber. The cavity enables perfect broadband light absorption (>99.999%) with optical losses localized in an ultrathin palladium (Pd) layer. Upon exposure to hydrogen, the Pd layer forms a hydride which actively shifts the cavity minimum reflectance wavelength by similar to 60 nm for a hydrogen concentration of 4%. The sensor enjoys extremely high figure of merit. The ease of fabrication, large area, and high sensitivity of our sensor make it an attractive and practical option, especially for miniaturized hydrogen sensors vital for medical and food safety applications.

引用

页码：1889 / 1894

页数：11

共 34 条

[1] AN INFRARED DIELECTRIC FUNCTION MODEL FOR AMORPHOUS SOLIDS [J].