Behaviors of field emitters under pulsed voltages  

作　　者：YANG Jin ZHANG GengMin 

机构地区：[1]Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China [2]Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China [3]SIP-UCLA Institute for Technology Advancement, Suzhou 215123, China

出　　处：《Science China(Technological Sciences)》2016年第11期1777-1784,共8页中国科学（技术科学英文版）

基　　金：supported by the Ministry of Science and Technology of China(Grant No.2013CB933604)

摘　　要：In this paper we described our study of the behaviors of field emitters driven by square-wave voltages. We observed phenomena under pulsed voltages that generally do not manifest themselves under direct-current voltages. We interpreted these phenomena with the cathode and anode combined treated as equivalent to a resistor and a condenser in series connection. First,because of the delay caused by the charging process of the condenser, the waveform of the voltage across the cathode-anode gap was remarkably distorted. Second, the resistor led to considerable attenuation in field emission, which was clearly observable within each pulse and became more dramatic with increasing repetition frequency of the pulses. Furthermore, the field emission currents under direct-current voltages were lower than those under pulsed voltages. This disparity is attributed to rising resistance in the circuit with rising temperature. We also discussed the restrictions that the waveform distortion and current attenuation could impose on potential field emitter applications.

关 键 词：field emission pulsed voltage charging current ATTENUATION waveform distortion 

分 类 号：TN78[电子电信—电路与系统] O462.4[理学—电子物理学]