Advanced seminar on
Laser-Matter Interactions
H. Ruhl and A. Scrinzi
Schedule (tentative)
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May 12: plasma physics / Ruhl group
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June 30: tunneling - atoms / stud
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May 19: plasma physics / Ruhl group
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July 7: tunneling – molecules / stud
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May 26: absorbing boundary / Tao
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July 14: multi-scale techniques / stud
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June 9: tunneling time / stud
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July 21: re-collision imaging / stud
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Jun 16: absorbing boundary / stud
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July 28: fields at surfaces / stud
Crediting
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Be present (do not miss more than 2 seminars!)
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Take active part in the discussions
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Make a presentation
Presenter: Liang Tao
Absorbing boundary conditions (1): exterior complex scaling
log 10(error
)
0
-8
Relative error:
Solution in a finite box vs. exact solutions
Student seminar:
Tunneling ionization – tunneling times:
How fast does a particle pass a tunneling barrier?
What about the “superluminal” speeds?
Delay in the photo-emission from an atom.
Can it be interpreted as “tunneling time”?
Fig. from P. Eckle et al., Science 322, p. 1525 (2008)
- explain approaches to defining a tunneling time
- review variations of the basic ideas in recent literature
Starting points in literature:
Theory:
Buettiker and Landauer, Phys. Rev. Lett. 49, p.1739 (1982)
Wigner, Phys. Rev. 98, p.145 (1955)
Experiment:
P. Eckle et al., Science 322, p. 1525 (2008)
Student seminar:
Atomic strong field ionization theory: ionization of hydrogen, ADK, Keldysh theory
Tunnel ionization
Multi-photon ionization
ε0
tunnel ionization
- explain basic concepts
- reproduce derivations from literature
- discuss limitations
Literature:
Landau/Lifshits, “Quantum mechanics”, chap.
Ammosov, Delone and Krainov, Sov. Phys. JETP 64, 1191 (1986).
Keldysh, Sov.Phys. JETP 20, 1307 (1965).
Student seminar:
Re-collision imaging: what can we learn about dynamics from laser ionization?
Figures from Baker et al., Science (2005)
- present the basic ideas
- critically assess available theory
- review potential applications (mostly experiments!)
Starting points in literature:
Experiment:
Huismans et al., Science 331 p. 61 (2011).
Theory:
Spanner et al., J. Phys. B 37, L243, (2004)
Lein, Phys.Rev. Lett. 94, 053004 (2005)
Shafir et al., New J. Phys. 12, p. 073032 (2011)
Student seminar:
Molecular strong field ionization: modifications of atomic theory, evidence for validity
Angular distribution of photo-emission from N2, O2, and CO2
Fig. from Pavicic et al.
Starting points in literature:
Experiment:
Pavicic et al. Phys. Rev. Lett 98, 243001 (2007)
Theory:
Smirnova et al., Nature 460, (2009)
Tong, Zhao, Lin, Phys. Rev. A 66, 033402 (2002)
de Nalda et al., Phys. Rev. A69, 031804 (2004)
Student seminar:
Laser fields a solid surfaces: emission time delays, transport
Tiny time-delay in photo-emission from surfaces
Figure from Cavalieri et al.
- explain basic idea
- review available theory (3 papers)
Starting points in literature:
Experiment:
Cavalieri et al., Nature 449, p. 1229 (2007)
Theory:
Lemell, Phys. Rev. A 79, p. 062901 (2009)
Kazansky and Echineque, Phys. Rev. Lett. 102, p.177401 (2009)
Zhang, 102, p.123601 (2009).
Guest seminar:
Transport in solids: Non-equilibrium Green's functions
Presenter: guest – (to be announced)