Strong-Field-Assisted Measurement of Near-Fields and Coherent Control of Photoemission at Nanometric Metal Tips

Förster M, Paschen T, Thomas S, Krüger M, Hommelhoff P (2017)

Publication Type: Book chapter / Article in edited volumes

Publication year: 2017

Publisher: Springer

Edited Volumes: Progress in Ultrafast Intense Laser Science

Book Volume: XIII

Pages Range: 143-155

URI: https://link.springer.com/chapter/10.1007/978-3-319-64840-8_8

DOI: 10.1007/978-3-319-64840-8_8

Abstract

Metal nanotips are an ideal testbed for ultrafast and strong-field physics at solids due to the superb control they allow over their very apex and the near-field at this apex that enhances an incident laser field. Particular attention has recently been devoted to the study of laser-induced electron emission from nanotips, where an enhanced fundamental understanding contributes to the implementation of nanotips as a source of femtosecond electron pulses. In this chapter we present photoemission studies at nanotips illuminated with femtosecond lasers. We demonstrate a new technique to measure the strength of near-fields at nanostructures by using our knowledge of the occurring strong-field physics. Electrons rescattering with the surface of the nanotip after emission give access to the prevalent near-field intensity on the nanometer scale. Our measurements fit well with independent simulations of Maxwell’s equations. In the second part we show that by employing a synthesized light field of a fundamental and a second harmonic laser pulse we achieve almost perfect coherent control of the photoemission process. We demonstrate that we can interpret our findings in terms of interfering quantum pathways.

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How to cite

APA:

Förster, M., Paschen, T., Thomas, S., Krüger, M., & Hommelhoff, P. (2017). Strong-Field-Assisted Measurement of Near-Fields and Coherent Control of Photoemission at Nanometric Metal Tips. In Progress in Ultrafast Intense Laser Science. (pp. 143-155). Springer.

MLA:

Förster, Michael, et al. "Strong-Field-Assisted Measurement of Near-Fields and Coherent Control of Photoemission at Nanometric Metal Tips." Progress in Ultrafast Intense Laser Science. Springer, 2017. 143-155.

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