TY - JOUR
T1 - Quantitatively analysis of nonlinear/linear nanofocusing of plasmonic tips array driven via radial vector beam
AU - Bai, Donghui
AU - Zhang, Lu
AU - Meng, Chao
AU - Xu, Lei
AU - Gao, Feng
AU - Zhang, Wending
N1 - Publisher Copyright:
© 2021 Elsevier GmbH
PY - 2021/10
Y1 - 2021/10
N2 - Electric field enhancement of the plasmonic tip-based nanofocusing light field determines the interaction efficiency of light and matter. Herein, the nonlinear/liner nanofocusing of the plasmonic tips array (PTA) is quantitatively analyzed, under excitation of the radial vector beam (RVB) and the linear polarization beam (LPB), respectively. Second harmonic (SH) emission intensity of PTA, under ultrafast RVB excitation, has been increased 18.6 times than that of the ultrafast LPB excitation. Experimental result is coincided with the theoretical prediction of 20.5 times, revealing that PTA has better nonlinear nanofocusing under excitation of the ultrafast RVB. The linear nanofocusing is examined via surface-enhanced Raman scattering (SERS). Under continuous wave RVB excitation, Raman scattering intensity of 4-Mercaptobenzoic acid (4MBA) is increased 4.5 times than that of LPB excitation, coinciding with the theoretically calculated electric field intensity enhancement of 4.8 times. Furthermore, the linear nanofocusing of PTA is examined using Raman scattering of the monolayer graphene, revealing that the linear nanofocusing of PTA will be slightly deteriorated, when a monolayer graphene is coated on PTA. This method may be adopted as a plasmonic tip-based nanofocusing light field with significant electric field enhancement to increase the light-matter nonlinear/linear interaction efficiency.
AB - Electric field enhancement of the plasmonic tip-based nanofocusing light field determines the interaction efficiency of light and matter. Herein, the nonlinear/liner nanofocusing of the plasmonic tips array (PTA) is quantitatively analyzed, under excitation of the radial vector beam (RVB) and the linear polarization beam (LPB), respectively. Second harmonic (SH) emission intensity of PTA, under ultrafast RVB excitation, has been increased 18.6 times than that of the ultrafast LPB excitation. Experimental result is coincided with the theoretical prediction of 20.5 times, revealing that PTA has better nonlinear nanofocusing under excitation of the ultrafast RVB. The linear nanofocusing is examined via surface-enhanced Raman scattering (SERS). Under continuous wave RVB excitation, Raman scattering intensity of 4-Mercaptobenzoic acid (4MBA) is increased 4.5 times than that of LPB excitation, coinciding with the theoretically calculated electric field intensity enhancement of 4.8 times. Furthermore, the linear nanofocusing of PTA is examined using Raman scattering of the monolayer graphene, revealing that the linear nanofocusing of PTA will be slightly deteriorated, when a monolayer graphene is coated on PTA. This method may be adopted as a plasmonic tip-based nanofocusing light field with significant electric field enhancement to increase the light-matter nonlinear/linear interaction efficiency.
KW - Local surface plasmon resonance
KW - Nonlinear optics at surface
KW - Nonlinear plasmonic
KW - Second harmonic
KW - Self-assembly method
KW - Surface-enhanced Raman scattering
UR - http://www.scopus.com/inward/record.url?scp=85109035529&partnerID=8YFLogxK
U2 - 10.1016/j.ijleo.2021.167409
DO - 10.1016/j.ijleo.2021.167409
M3 - 文章
AN - SCOPUS:85109035529
SN - 0030-4026
VL - 243
JO - Optik
JF - Optik
M1 - 167409
ER -