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Article overview
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Spin-Orbit Larmor Clock for Ionisation Times in One-Photon and Strong-Field Regimes | Jivesh Kaushal
; Felipe Morales
; Lisa Torlina
; Misha Ivanov
; Olga Smirnova
; | Date: |
1 Aug 2015 | Abstract: | Photoionisation is a process where absorption of one or several photons
liberates an electron and creates a hole in a quantum system, such as an atom
or a molecule. Is it faster to remove an electron using one or many photons,
and how to define this time? Here we introduce a clock that allows us to define
ionisation time for both one-photon and many-photon ionisation regimes. The
clock uses the interaction of the electron or hole spin with the magnetic field
created by their orbital motion, known as the spin-orbit interaction. The angle
of spin precession in the magnetic field records time. We use the combination
of analytical theory and ab-initio calculations to show how ionisation delay
depends on the number of absorbed photons, how it appears in the experiment and
what electron dynamics it signifies. In particular, we apply our method to
calculate the derived time delays in tunnelling regime of strong-field
ionisation. | Source: | arXiv, 1508.0112 | Services: | Forum | Review | PDF | Favorites |
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