Journal
NATURE PHOTONICS
Volume 8, Issue 3, Pages 214-218Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2013.348
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Funding
- Munich-Centre for Advanced Photonics
- Marie Curie International Incoming Fellowship (project NANOULOP) [302157]
- ERC
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Attosecond science relies on the use of intense, waveform-controlled, few-cycle laser pulses(1) to control extreme nonlinear optical processes taking place within a fraction of an optical period. A number of techniques are available for retrieving the amplitude envelope and chirp of such few-cycle laser pulses. However, their full characterization requires detection of the absolute offset between the rapidly oscillating carrier wave and the pulse envelope, the carrier-envelope phase (CEP). So far, this has only been feasible with photoelectron spectroscopy, relying on complex vacuum set-ups2-4. Here, we present a technique that enables the detection of the CEP of few-cycle laser pulses under ambient conditions. This is based on the CEP-dependence of directly measurable electric currents generated by the electric field of light in a metal-dielectric-metal nanojunction. The device holds promise for routine measurement and monitoring of the CEP in attosecond laboratories.
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