Surface-enhanced infrared absorption with Si-doped InAsSb/GaSb nano-antennas

被引：15
作者：
Milla, M. J. [1 ,2 ]
Barho, F. [1 ,2 ]
Gonzalez-Posada, F. [1 ,2 ]
Cerutti, L. [1 ,2 ]
Charlot, B. [1 ,2 ]
Bomers, M. [1 ,2 ]
Neubrech, F. [3 ]
Tournie, E. [1 ,2 ]
Taliercio, T. [1 ,2 ]
机构：
[1] Univ Montpellier, IES, UMR 5214, F-34000 Montpellier, France
[2] CNRS, IES, UMR 5214, F-34000 Montpellier, France
[3] Heidelberg Univ, Kirchhoff Inst Phys, Neuenheimer Feld 227, D-69120 Heidelberg, Germany
来源：
OPTICS EXPRESS | 2017年 / 25卷 / 22期
关键词：
PLASMONIC ENHANCEMENT; VIBRATIONAL SIGNALS; NANOANTENNAS; SPECTROSCOPY; SCATTERING; GRATINGS; SHAPE; GOLD;
D O I：
10.1364/OE.25.026651
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate surface enhanced infrared absorption spectroscopy using 1-dimensional highly doped semiconductors based on Si-doped InAsSb plasmonic nano-antennas. Engineering the plasmonic array to support the localized surface plasmon resonance aligned with the molecular vibrational absorption mode of interest involves finely setting the doping level and nano-antenna width. Heavily doped nano-antennas require a wider size compared to lightly doped resonators. Increasing the doping level, and consequently the width of the nano-antenna, enhances the vibrational absorption of a similar to 15 nm thick organic layer up to 2 orders of magnitude compared to the unstructured sample and therefore improves sensing. These results pave the way towards molecule fingerprint sensor manufacturing by tailoring the plasmonic resonators to get a maximum surface enhanced infrared absorption at the target vibrational mode. (C) 2017 Optical Society of America
引用
收藏
页码：26651 / 26661
页数：11
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