A nanoscale vacuum-tube diode triggered by few-cycle laser pulses

被引：34

作者：

Higuchi, Takuya ^{[1
,2
]}

Maisenbacher, Lothar ^{[2
]}

Liehl, Andreas ^{[2
]}

Dombi, Peter ^{[2
]}

Hommelhoff, Peter ^{[1
,2
]}

机构：

[1] Univ Erlangen Nurnberg, Dept Phys, D-91058 Erlangen, Germany

[2] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 05期

关键词：

ELECTRON-DIFFRACTION; PHOTOEMISSION; SPECTROSCOPY; MICROSCOPY; FIELDS; PHASE; TIP;

D O I：

10.1063/1.4907607

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose and demonstrate a nanoscale vacuum-tube diode triggered by few-cycle near-infrared laser pulses. It represents an ultrafast electronic device based on light fields, exploiting near-field optical enhancement at surfaces of two metal nanotips. The sharper of the two tips displays a stronger field-enhancement, resulting in larger photoemission yields at its surface. One laser pulse with a peak intensity of 4.7 x 10(11) W/cm(2) triggers photoemission of similar to 16 electrons from the sharper cathode tip, while emission from the blunter anode tip is suppressed by 19 dB to similar to 0.2 electrons per pulse. Thus, the laser-triggered current between two tips exhibit a rectifying behavior, in analogy to classical vacuum-tube diodes. According to the kinetic energy of the emitted electrons and the distance between the tips, the total operation time of this laser-triggered nanoscale diode is estimated to be below 1 ps. (C) 2015 AIP Publishing LLC.

引用

页数：4

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