Photoinduced effects in field electron emission from diamond needles
Photoinduced effects in field electron emission from diamond needles
复制标题
金刚石针场电子发射的光致效应
DOI：
10.1063/1.4982646
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发表时间：
2017
影响因子：
4
通讯作者：
A. Obraztsov
中科院分区：
文献类型：
--
作者：
V. Porshyn;V. Kleshch;E. Obraztsova;A. Chuvilin;D. Lützenkirchen;A. Obraztsov
本文报道了金刚石光激电子场发射的实验观测结果。研究了单晶金刚石针在黑暗和纳秒脉冲激光照射下的电子发射特性。一个显着的增加，在电子发射电流的照射下检测到的光子能量高于5.0 eV的光。在5.0 ~ 5.9 eV的光谱范围内，光致发射电流与光强呈线性关系，而场效应则表现出饱和特性。观察到的现象的显著特征是，在所使用的实验装置中，金刚石针的照明区和场发射区在空间上分离约100 μm。所观察到的效果的可能机制进行了讨论。
We report an explicit experimental observation of photostimulated electron field emission from diamond. The electron emission properties of monocrystalline diamond needles were investigated in the dark and under illumination by nanosecond laser pulses. A prominent increase in the electron emission current was detected under illumination by light with photon energies above 5.0 eV. The linear dependence of the photoinduced emission current on the light intensity was observed in the spectral range of 5.0 to 5.9 eV, while its field dependence demonstrated saturation behavior. The remarkable feature of the observed phenomenon was the fact that illuminated and field emission areas of the diamond needles were spatially separated by about 100 μm in the used experimental setup. Possible mechanisms for the observed effects are discussed.