Optical and electrical mappings of surface plasmon cavity modes

Nanophotonics

article

Fan Ye¹  Juan M. Merlo¹  Michael J. Burns¹  Michael J. Naughton¹ 

[1] Department of Physics, Boston College

关键词: cathodoluminescence spectroscopy;    cavity modes;    electron energy loss spectroscopy;    fluorescence microscopy;    near-field optical scanning microscopy;    spatial mapping;    surface plasmon polaritons;   

DOI  :  10.1515/nanoph-2013-0038

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Plasmonics is a rapidly expanding field, founded in physics but now with a growing number of applications in biology (biosensing), nanophotonics, photovoltaics, optical engineering and advanced information technology. Appearing as charge density oscillations along a metal surface, excited by electromagnetic radiation (e.g., light), plasmons can propagate as surface plasmon polaritons, or can be confined as standing waves along an appropriately-prepared surface. Here, we review the latter manifestation, both their origins and the manners in which they are detected, the latter dominated by near field scanning optical microscopy (NSOM/SNOM). We include discussion of the “plasmonic halo” effect recently observed by the authors, wherein cavity-confined plasmons are able to modulate optical transmission through step-gap nanostructures, yielding a novel form of color (wavelength) selection.

【 授权许可】

CC BY