Simulations of the interaction of tunneling electrons with optical fields in laser‐illuminated field emission
Simulations of the interaction of tunneling electrons with optical fields in laser‐illuminated field emission
复制标题
激光场发射中隧道电子与光场相互作用的模拟
DOI：
10.1116/1.587851
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发表时间：
1995
影响因子：
1.4
通讯作者：
M. Hagmann
中科院分区：
文献类型：
--
作者：
M. Hagmann
通过射击方法的数值过程求解正弦调制障碍的一维瞬态薛定谔方程。对方形势垒以及场发射静态势的 Fowler-Nordheim 模型的计算表明了新共振的存在。谐振时增加的隧道电流主要出现在上边带，该上边带由从时间相关势垒吸收一个量子的粒子组成。使用激光照明场发射的典型参数，这种共振相当广泛，通常集中在 400 至 600 nm 之间。对两个频率差异较小的连续激光器和一个调幅激光器的照明进行的分析表明，通过使用在新谐振附近工作的激光器，可以在微波频率下有效地调制发射的电流。
The one‐dimensional time‐dependent Schrodinger equation is solved for a sinusoidally modulated barrier by means of the numerical procedure of shooting methods. Calculations for square barriers, as well as for the Fowler–Nordheim model of the static potential in field emission, show the existence of a new resonance. The increased tunneling current at resonance is primarily in the upper sideband, which consists of particles that have absorbed one quantum from the time‐dependent barrier. Using parameters that are typical of laser‐illuminated field emission, this resonance is rather broad and is generally centered between 400 and 600 nm. Analyses for illumination by two cw lasers with a small difference in frequency, and by one amplitude‐modulated laser, suggest that the emitted current could be modulated efficiently at microwave frequencies by using lasers operating near the new resonance.