We demonstrate the design, fabrication, characterization, and operation of high-density arrays of Au nanorod electron emitters, fabricated by high-resolution electron beam lithography, and excited by ultrafast femtosecond near-infrared radiation. Electron emission characteristic of multiphoton absorption has been observed at low laser fluence, as indicated by the power-law scaling of emission current with applied optical power. The onset of space-charge-limited current and strong optical field emission has been investigated so as to determine the mechanism of electron emission at high incident laser fluence. Laser-induced structural damage has been observed at applied optical fields above 5 GV m[superscript −1], and energy spectra of emitted electrons have been measured using an electron time-of-flight spectrometer.
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机译：我们演示了金纳米棒电子发射器的高密度阵列的设计，制造，表征和操作，该阵列由高分辨率电子束光刻制造，并由超快飞秒近红外辐射激发。在低激光通量下已观察到多光子吸收的电子发射特性，如发射电流与施加光功率的幂律定标所表明的。研究了空间电荷限制电流的产生和强光场的发射，以确定高入射激光通量下电子发射的机理。在高于5 GV m [上标-1]的外加光场上观察到了激光引起的结构损伤，并且已经使用电子飞行时间光谱仪测量了发射电子的能谱。
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