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1 March 2010 Confined electron emission with femtosecond timing: nonlinearity, localization, enhancement
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The local extraction of electrons from metal nanotips is an essential component of both scanning tunneling microscopes and transmission or scanning electron microscopes based on field emission cathodes. Laser-induced electron emission from sharp tip structures is a prerequisite for equipping such methods with ultrafast temporal resolution. In this paper, recent experiments on femtosecond electron emission from sharp gold tips are discussed. Based on far-field and near-field characterization, confined multiphoton electron emission from the apex is demonstrated. The effective nonlinearity can be tuned by the application of an additional static bias voltage.
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Max Gulde, Reiner Bormann, Alexander Weismann, Sergey V. Yalunin, and Claus Ropers "Confined electron emission with femtosecond timing: nonlinearity, localization, enhancement", Proc. SPIE 7600, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV, 76001I (1 March 2010);

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