Field Emission of Electrons Generated by the Near Field of Strongly Coupled Plasmons

被引：63

作者：

Schertz, Florian ^{[1
]}

Schmelzeisen, Marcus ^{[2
,3
]}

Kreiter, Maximilian ^{[2
]}

Elmers, Hans-Joachim ^{[1
]}

Schoenhense, Gerd ^{[1
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[2] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[3] Tech Univ Darmstadt, Ctr Smart Interfaces, D-64287 Darmstadt, Germany

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 23期

关键词：

MULTIPHOTON PHOTOELECTRIC-EMISSION; PHOTOEMISSION; METALS; MICROSCOPY; SURFACES; PULSES;

D O I：

10.1103/PhysRevLett.108.237602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Field emission of electrons is generated solely by the ultrastrong near-field of strongly coupled plasmons without the help of a noticeable dc field. Strongly coupled plasmons are excited at Au nanoparticles in subnanometer distance to a Au film by femtosecond laser pulses. Field-emitted electrons from individual nanoparticles are detected by means of photoelectron emission microscopy and spectroscopy. The dependence of total electron yield and kinetic energy on the laser power proves that field emission is the underlying emission process. We derive a dynamic version of the Fowler-Nordheim equation that yields perfect agreement with the experiment.

引用

页数：5

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