基于等离子体电子发射研究进展

Research Progress of Plasmon Electron Emission

等离子体发射指光激发等离子体共振产生的热电子获得足够的能量克服固体表面的能量障碍发射到真空的过程,是等离激元与光电发射相结合的过程。但是其与光电子发射不同之处在于不需要使用高静电场或高激光强度,只需要较低强度的光和电场驱动等离激元纳米材料而进行的电子发射。石墨烯作为新兴的等离激元材料,可通过等离子体电子发射,实现可控光电器件的研制、器件微型化与工业化。

Plasmon emission refers to the process in which thermal electrons generated by light-excited plasmon resonance with enough energy overcome the energy barrier on the solid surface and emit into vacuum,which is a combination of plasmon and photoemission.The difference between plasmon emission and photoelectron emission is that there is no need of high static electric field or high laser intensity,and only low intensity light and electric field driven plasmon nanostructure is necessary for electron emission.As an emerging plasmon material,graphene can realize the development of controllable optoelectronic devices,miniaturization and industrialization of devices,through plasmon electron emission.