Detailed Information

Cited 1 time in webofscience Cited 0 time in scopus
Metadata Downloads

Direct comparison with terahertz metamaterials and surface- enhanced Raman scattering in a molecular-specific sensing performance

Authors
Lee, Soo HyunRoh, YeeunLee, Sang-HunRyu, Yong-SangJu, Byeong-KwonSeo, Minah
Issue Date
4-1월-2021
Publisher
OPTICAL SOC AMER
Citation
OPTICS EXPRESS, v.29, no.1, pp.12 - 23
Indexed
SCIE
SCOPUS
Journal Title
OPTICS EXPRESS
Volume
29
Number
1
Start Page
12
End Page
23
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/50151
DOI
10.1364/OE.412474
ISSN
1094-4087
Abstract
Signal enhancement of spectroscopies including terahertz time-domain spectroscopy (THz-TDS) and surface-enhanced Raman scattering (SERS) is a critical issue for effective molecular detection and identification. In this study, the sensing performance between THzTDS and SERS individually accompanied by the proper plasmonic subwavelength structures was compared. For the precisely quantitative study on the optical properties of rhodamine 6G (R6G) dyes, SERS incorporates with the non-linearly enhanced Raman emissions at the molecular characteristic peaks while THz-TDS refers to the transmittance change and the shift of the spectral resonance. The local molecular density-dependent trade-off relationship between limit-of-detection and quenching was observed from both measurements. The specificity for two samples, R6G and methylene blue, is determined by the discriminations in spectral features such as the intensity ratio of assigned peaks in SERS and transmittance difference in THz-TDS. The comprehension of field enhancement by the specific nanostructures was supported by the finite-element method-based numerical computations. As a result, both spectroscopic techniques with the well-tailored nanostructures show great potential for highly sensitive, reproducible, label-free, and cost-effective diagnosis tools in the biomedical fields. (c) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > School of Electrical Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Ju, Byeong kwon photo

Ju, Byeong kwon
공과대학 (전기전자공학부)
Read more

Altmetrics

Total Views & Downloads

BROWSE