Optical detection of tunneling ionization

We have experimentally detected optical harmonics that are generated due to a tunneling-ionization-induced modulation of the electron density. The optical signature of electron tunneling can be isolated from concomitant optical responses by using a noncollinear pump-probe setup. Whereas previously d...

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Bibliographic Details
Published in:Physical review letters 2010-04, Vol.104 (16), p.163904-163904, Article 163904
Main Authors: Verhoef, Aart J, Mitrofanov, Alexander V, Serebryannikov, Evgenii E, Kartashov, Daniil V, Zheltikov, Aleksei M, Baltuska, Andrius
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
CHARGED PARTICLE DETECTION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DETECTION
ELECTRON DENSITY
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FLUIDS
GASES
HARMONICS
IONIZATION
LEPTONS
MODULATION
OSCILLATIONS
PLASMA
PROBES
RADIATION DETECTION
RESOLUTION
SIGNALS
SURFACES
TIME RESOLUTION
TIMING PROPERTIES
TUNNEL EFFECT
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Summary:We have experimentally detected optical harmonics that are generated due to a tunneling-ionization-induced modulation of the electron density. The optical signature of electron tunneling can be isolated from concomitant optical responses by using a noncollinear pump-probe setup. Whereas previously demonstrated tools for attosecond metrology of gases, plasmas, and surfaces rely on direct detection of charged particles, detection of the background-free time-resolved optical signal, which uniquely originates from electron tunneling, offers an interesting alternative that is especially suited for systems in which free electrons cannot be directly measured.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.104.163904