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碳纳米管电子源实现0.3电子伏特超窄能散与飞秒级 ...
传统金属尖端激光驱动电子源(metal-tip-based electron sources)长期受困于能量分布(energy spread)与脉冲宽度(pulse width)的此消彼长,现有技术难以突破1 eV能散和数百飞秒脉宽的双重限制。这项研究展示了一种基于一维碳纳米管(carbon-nanotube)的奇特延时发射现象:当7飞秒(7-fs)超短激光脉冲作用于 ...
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