Title :
Carrier-envelope phase dependent photoemission from a nanometric metal tip
Author :
Schenk, Markus ; Krüger, Michael ; Hommelhoff, Peter
Author_Institution :
Max-Planck-Inst. fur Quantenopt., Garching, Germany
Abstract :
We tightly focus ~ 6fs Ti:sa pulses onto a nanome-tric metal tip and record photoelectron spectra at laser intensities of about ~ 4 × 1011 W/cm2. Here we present a strong carrier-envelope phase (CEP) dependent current modulation. In the high energy region of the spectra the CEP modulation rises up to 100%, meaning that the CEP can switch the photocurrent fully on and off. The metal tip resembles a record sensitive miniaturized CEP sensor with a precision exceeding about 15 mrad in 20s measurement time. Even CEP-stabilizing a Ti:sa-oscillator with the signal of the emitted photoelectrons of a tip seems feasible.
Keywords :
high-speed optical techniques; photoelectron spectra; photoemission; carrier-envelope phase dependent photoemission; emitted photoelectrons; nanometric metal tip; photoelectron spectra; Metals; Modulation; Optical pulses; Optical sensors; Photoelectricity; Surface emitting lasers; Ultrafast optics;
Conference_Titel :
Frequency Control and the European Frequency and Time Forum (FCS), 2011 Joint Conference of the IEEE International
Conference_Location :
San Fransisco, CA
Print_ISBN :
978-1-61284-111-3
DOI :
10.1109/FCS.2011.5977733
