The role of gap plasmons in light emission from tunnel junctions

被引：8

作者：

Divitt, Shawn ^{[1
]}

Bharadwaj, Palash ^{[1
]}

Novotny, Lukas ^{[1
]}

机构：

[1] ETH, Photon Lab, CH-8093 Zurich, Switzerland

来源：

OPTICS EXPRESS | 2013年 / 21卷 / 22期

基金：

瑞士国家科学基金会;

关键词：

MICROSCOPE; FILMS;

D O I：

10.1364/OE.21.027452

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Light emission from the junction of a scanning tunneling microscope (STM) is examined in the presence of 20 nm topographical features in thin gold films. These features significantly modify the emission rates of the junction. Contributions to this modification are discriminated by examining emission rates on samples where the material is varied spatially. It is found that the variability in STM photoemission rates between a gold tip and a gold sample under ambient conditions is due to the modification of localized gap plasmon modes and not to the presence of an electroluminescent gold cluster on the STM probe apex. (C) 2013 Optical Society of America

引用

收藏

页码：27452 / 27459

页数：8

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