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Ultrabroadband Metasurface for Efficient Light Trapping and Localization: A Universal Surface‐Enhanced Raman Spectroscopy Substrate for “All” Excitation Wavelengths
Author(s) -
Zhang Nan,
Liu Kai,
Liu Zhejun,
Song Haomin,
Zeng Xie,
Ji Dengxin,
Cheney Alec,
Jiang Suhua,
Gan Qiaoqiang
Publication year - 2015
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201500142
Subject(s) - materials science , excitation , raman spectroscopy , wavelength , substrate (aquarium) , laser , optoelectronics , surface enhanced raman spectroscopy , optics , spectroscopy , trapping , excitation wavelength , raman scattering , physics , ecology , oceanography , quantum mechanics , biology , geology
Most reported surface‐enhanced Raman spectroscopy (SERS) substrates can work for individual excitation wavelengths only. Therefore, different substrates have to be used for different excitation wavelengths, which consumes more biological/chemical materials, substrates, and measurement time. Here, an ultrabroadband super absorbing metasurface that can work as a universal substrate for low cost and high performance SERS sensing is reported. Due to broadband light trapping and localized field enhancement, this structure can work for almost “all” available laser lines from 450 to 1100 nm. This predicted feature is validated by SERS experiment using five different excitation laser lines, obtaining a high enhancement factor of 5.3 × 10 7 and very good uniformity over large areas.