Ultrafast electron emission from metallic nanotip arrays induced by near infrared femtosecond laser pulses

被引:46
作者
Tsujino, S. [1 ]
Beaud, P. [1 ]
Kirk, E. [1 ]
Vogel, T. [1 ]
Sehr, H. [1 ]
Gobrecht, J. [1 ]
Wrulich, A. [2 ]
机构
[1] Paul Scherrer Inst, Dept Synchrotron Radiat & Nanotechnol, CH-5232 Villigen, Switzerland
[2] Paul Scherrer Inst, PSI XFEL, CH-5232 Villigen, Switzerland
关键词
D O I
10.1063/1.2924290
中图分类号
O59 [应用物理学];
学科分类号
摘要
The authors explore the impact of femtosecond light pulses on the field-emission properties of single-gate molybdenum field-emitter arrays with nanometer scale tip apex. Despite the small fraction of the emission area, we observed a single-photon photoelectric current from the emitter tips on top of the dc field-emission current under the irradiation of 50 fs laser pulses at a wavelength of 800 nm with an external quantum efficiency up to similar to 2 x 10(-7) and the emitter tip quantum efficiency of similar to 10(-2). The result indicates that metallic field-emitter arrays are promising for applications that require high-brightness short electron beams. (C) 2008 American Institute of Physics.
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