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Extreme-ultraviolet high-harmonic generation and spectroscopy in condensed matter

date
14.11.2018 
time
04:30 PM - 05:30 PM 
speaker
Tran Trung Luu 
affiliation
ETH Zuerich 
language
en 
main topic
Physics: Theoretical Physics
abstract

Attosecond science, studies of electron dynamics in their natural time
scale, stems from the development of mostly extreme ultraviolet sources
through high-order harmonic generation in gas-phase systems. Recently,
being ignited by the researches done in Stanford, high-order harmonic
generation in solids has been discovered and been actively investigated.
The coherent, extreme ultraviolet radiation from solids can be utilized
not only as a new source for technical applications but it also offers a
great tool to study electronic properties of solids. In this talk, we
briefly review the developments in this emerging field and we report our
newest results. In details, we demonstrate the first polarimetry
measurement of high-order harmonic generation from solids and use it to
uncover the non-vanishing Berry curvature underlying the generation of
even harmonics in quartz, in orthogonal polarization with respect to the
linearly incident electric field. First ab initio calculation of Berry
curvature of quartz has been carried out and it shows a high degree of
agreement to the experimentally retrieved Berry curvature which
concludes an important spectroscopic application. Furthermore, we extend
high-order harmonic generation in condensed matter by reporting on the
unambiguous, systematic, experimental investigations of the high-order
harmonic generation in liquids, the third phase of matter. By utilizing
a liquid flat-jet as a target for light-matter interaction, coherent,
intense extreme ultraviolet radiation is recorded in the form of
multiple odd-order harmonics reaching up to 27 order and extending
beyond 20 electron Volt. The intensity scaling and the ellipticity
measurement show the non-perturbative, solid-like nature of the
radiation. Highest cut-off energy photons were obtained using ethanol by
comparison to water and other liquids. Our investigation serves as a
promising first step in utilizing the new source of coherent extreme
ultraviolet radiation as well as exploring electron dynamics in
liquid-phase of matter.

 

Last update: 14.11.2018 00:08.

venue 

Max-Planck-Institut für Physik komplexer Systeme (Room 1D1) 
Nöthnitzer Straße 38
01187 Dresden
telefon
+ 49 (0)351 871 0 
e-mail
Max-Planck-Institut für Physik komplexer Systeme 
homepage
http://www.mpipks-dresden.mpg.de 

organizer 

Max-Planck-Institut für Physik komplexer Systeme (MPI-PKS)
Nöthnitzer Straße 38
01187 Dresden
telefon
+ 49 (0)351 871 0 
e-mail
Max-Planck-Institut für Physik komplexer Systeme (MPI-PKS) 
homepage
http://www.mpipks-dresden.mpg.de 
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