Mid- to long-wavelength infrared surface plasmon properties in doped zinc oxides

被引:9
作者
Cleary, Justin W. [1 ]
Snure, Michael [1 ]
Leedy, Kevin D. [1 ]
Look, David C. [2 ,3 ]
Eyink, Kurt [4 ]
Tiwari, Ashutosh [5 ]
机构
[1] USAF, Res Lab, Sensors Directorate, Wright Patterson AFB, OH 45433 USA
[2] Wyle Labs Inc, Dayton, OH 45431 USA
[3] Wright State Univ, Semicond Res Ctr, Dayton, OH 45435 USA
[4] Air Force Res Lab, Mat Directorate, Wright Patterson AFB, OH 45433 USA
[5] Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA
来源
OPTICAL MATERIALS AND BIOMATERIALS IN SECURITY AND DEFENCE SYSTEMS TECHNOLOGY IX | 2012年 / 8545卷
关键词
plasmonics; infrared; sensors; waveguides; zinc oxides; RESONANCE; SILICON;
D O I
10.1117/12.974619
中图分类号
TB3 [工程材料学]; R318.08 [生物材料学];
学科分类号
0805 ; 080501 ; 080502 ;
摘要
This work investigates properties of surface plasmons on doped metal oxides in the 2-20 mu m wavelength regime. By varying the stoichiometry in pulse laser deposited Ga and Al doped ZnO, the plasmonic properties can be controlled via a fluctuating free carrier concentration. This deterministic approach may enable one to develop the most appropriate stoichometry of ZnAlO and ZnGaO in regards to specific plasmonic applications for particular IR wavelengths. Presented are theoretical and experimental investigations pertaining to ZnAlO and ZnGaO as surface plasmon host materials. Samples are fabricated via pulsed laser deposition and characterized by infrared ellipsometry and Hall-effect measurements. Complex permittivity spectra are presented, as well as plasmon properties such as the field propagation lengths and penetration depths, in the infrared range of interest. Drude considerations are utilized to determine how the optical properties may change with doping. Finite element simulations verify these plasmonic properties. These materials not only offer potential use as IR plasmon hosts for sensor applications, but also offer new integrated device possibilities due to stoichiometric control of electrical and optical properties.
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页数:10
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