Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.97: Poster

Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer

Phase-resolved photoemission from metal nanotips at infrared wavelengths — •Michael Förster, Timo Paschen, Sebastian Thomas, and Peter Hommelhoff — Lehrstuhl für Laserphysik, Department Physik, FAU Erlangen-Nürnberg

Strong-field photoemission from metal nanotips has recently received much attention [1,2,3]. While it shares some of the physics with strong-field photoemission from gases and molecules, the excited near-field at tips also involves the field of nanooptics. This on the one hand leads to new effects, such as the suppression of quiver motion at mid- IR wavelengths [2], and on the other hand enables to use attosecond physics to measure near fields at nanostructures with unprecedented precision [4].

In this contribution we show photoemission from nanotips using a 100 kHz carrier-envelope phase (CEP)-stable few-cycle source around 1.8 um [5], similar to [3]. High pulse energies and infrared wavelengths enable us to study CEP effects in photoemission in the tunnelling regime. We discuss our results using theoretical models.

[1] M. Krüger et al., Nature 475, 79 (2011).

[2] G. Herink et al., Nature 483, 190 (2012).

[3] B. Piglosiewicz et al., Nature Photonics 8, 37 (2014).

[4] S. Thomas et al., Nano Lett. 13, 4790 (2013).

[5] C. Homann et al., Opt. Lett. 37, 1673 (2012).