Strong enhancement of forbidden atomic transitions using plasmonic nanostructures

被引：70

作者：

Kern, A. M. ^{[1
]}

Martin, O. J. F. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol EPFL, Nanophoton & Metrol Lab NAM, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW A | 2012年 / 85卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

SINGLE MOLECULES; SPECTROSCOPY; RADIATION;

D O I：

10.1103/PhysRevA.85.022501

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the mediation of symmetry-forbidden atomic transitions using plasmonic nanostructures. We show that the excitation of the electric dipole-forbidden, quadrupole-allowed 6(2)S(1/2) - 5(2)D(5/2) transition in cesium may be enhanced by more than 6 orders of magnitude in the intense, inhomogeneous near field of a plasmonic nanoantenna. Using optical reciprocity, the enhancement can be understood to apply to spontaneous emission as well, allowing the fast and efficient optical detection of excited atoms.

引用

页数：5

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