Near-Field Enhancement Localization on Plasmonic Gratings

被引：12

作者：

Gillibert, Raymond ^{[1
,2
]}

Sarkar, Mitradeep ^{[3
]}

Moreau, Julien ^{[3
]}

Besbes, Mondher ^{[3
]}

Canva, Michael ^{[3
]}

de la Chapelle, Marc Lamy ^{[1
]}

机构：

[1] Univ Paris 13, Sorbonne Paris Cite, Lab CSPBAT, CNRS,UMR 7244, 74 Rue Marcel Cachin, F-93017 Bobigny, France

[2] HORIBA Jobin Yvon SAS, 231 Rue Lille, F-59650 Villeneuve Dascq, France

[3] Univ Paris Saclay, CNRS, Grad Sch, Lab Charles Fabry,Inst Opt, F-91227 Palaiseau, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2016年 / 120卷 / 48期

关键词：

RAMAN EXCITATION SPECTROSCOPY; SINGLE-NANOPARTICLE SERS; DIFFERENCE TIME-DOMAIN; SILVER NANOPARTICLES; NANOSPHERE LITHOGRAPHY; SCATTERING; MOLECULE; ARRAYS; RESONANCE; NANOSTRUCTURES;

D O I：

10.1021/acs.jpcc.6b09717

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Plasmonic properties of arrays of gold nanodisks were investigated to study the localization of the near-field enhancement at the surface of the nanodisks. To measure the near field, surface-enhanced Raman spectroscopy (SERS) was performed on different kinds of substrates with and without an over layer of silica that disabled the possibility for our SERS probe to adsorb on the top of our structures. Thanks to this, we were able to determine, depending on the substrate, which fraction of the SERS enhancement was coming from the top of our structures. We demonstrate that the near-field enhancement is mainly localized at the top of the nanodisks in the case of dielectric substrate, whereas it comes from the nanodisk side for metallic subfilm substrate.

引用

页码：27562 / 27570

页数：9