Fabrication and characterization of molecular beam epitaxy grown thin-film GaAs waveguides for mid-infrared evanescent field chemical sensing

被引：62

作者：

Charlton, Christy

Giovannini, Marcella

Faist, Jerome

Mizaikoff, Boris ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA

[2] Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland

来源：

ANALYTICAL CHEMISTRY | 2006年 / 78卷 / 12期

关键词：

D O I：

10.1021/ac052214a

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Thin-film GaAs waveguides were designed and fabricated by molecular beam epitaxy for use in mid-infrared (MIR) evanescent field liquid sensing. Waveguides were designed to facilitate the propagation of a single mode at a wavelength of 10.3 mu m emitted from a distributed feedback quantum cascade laser, which overlaps with molecular selective absorption features of acetic anhydride. The characterization of the waveguides shows transmission across a broad MIR band. Evanescent field absorption measurements indicate a significant sensitivity enhancement in contrast to multimode planar silver halide waveguides.

引用

页码：4224 / 4227

页数：4

共 26 条

[1] Midinfrared sensors meet nanotechnology: Trace gas sensing with quantum cascade lasers inside photonic band-gap hollow waveguides [J].