Plasmonic particle-on-film nanocavities: a versatile platform for plasmon-enhanced spectroscopy and photochemistry

Author:

Li Guang-Can1,Zhang Qiang2,Maier Stefan A.34,Lei Dangyuan15

Affiliation:

1. Department of Applied physics, The Hong Kong Polytechnic University, Hong Kong, China

2. School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, China

3. The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom

4. Fakultät für Physik, Ludwigs-Maximilians-Universität München, 80799 München, Germany

5. Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen, China

Abstract

AbstractMetallic nanostructures with nanometer gaps support hybrid plasmonic modes with an extremely small mode volume and strong local field intensity, which constitutes an attractive plasmonic platform for exploring novel light-matter interaction phenomena at the nanoscale. Particularly, the plasmonic nanocavity formed by a metal nanoparticle closely separated from a thin metal film has received intensive attention in the nanophotonics community, largely attributed to its ease of fabrication, tunable optical properties over a wide spectral range, and the ultrastrong confinement of light at the small gap region scaled down to sub-nanometer. In this article, we review the recent exciting progress in exploring the plasmonic properties of such metal particle-on-film nanocavities (MPoFNs), as well as their fascinating applications in the area of plasmon-enhanced imaging and spectroscopies. We focus our discussion on the experimental fabrication and optical characterization of MPoFNs and the theoretical interpretation of their hybridized plasmon modes, with particular interest on the nanocavity-enhanced photoluminescence and Raman spectroscopies, as well as photocatalysis and molecular nanochemistry.

Funder

National Natural Science Foundation of China

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology

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