Heidelberg 2015 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.92: Poster

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

Nanoscale vacuum-tube electronics devices triggered by few-cycle laser pulses — •Michal Hamkalo¹, Takuya Higuchi¹, M. Alexander Schneider², and Peter Hommelhoff¹ — ¹Lehrstuhl für Laserphysik — ²Lehrstuhl für Festkörperphysik

Electrons emitted from metal nano-tips via above-threshold photoemission driven by few-cycle laser pulses were shown to be extremely confined in both time and space, even sensitive to the carrier-envelope-phase of a few-cycle laser pulse [1]. In this study, we propose a way to implement these spatiotemporally confined electrons into vacuum-tube electronics devices, instead of the thermally emitted electrons in the conventional tube electronics. This is beneficial to downsize the structures, as well as improving their operation speed. As a first step, we demonstrate a diode structure, where two metal nano tips work as a cathode and an anode, respectively. The electron emission yields of these tips are controlled by tailoring the optical near fields via tuning of their radii of curvature. Current status of the experiments to further decrease the distance between two tips with a better mechanical stability will be presented.

References

1. M. Krüger, M. Schenk and P. Hommelhoff "Attosecond control of electrons emitted from a nanoscale metal tip", Nature 475, 78-81 (2011)