Microwavephysics and Atmospheric Physics
Biomedizinische Photonik
Ultrafast Science and Technology
HS 2018  ·  FS 2018
HS 2017  ·  FS 2017
HS 2016  ·  FS 2016
HS 2015  ·  FS 2015
HS 2014  ·  FS 2014
HS 2013  ·  FS 2013
HS 2012  ·  FS 2012
Last update: 21.08.2018
HS 2018: Seminare über Ultrafast Science and Technology
Thursday 11:15am
Vorträge, die innerhalb der nächsten Tage stattfinden, sind speziell markiert.
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Donnerstag, 20.09.2018

No seminar

Zeit: 11:15 Uhr
Hörsaal: B116
 

 
Donnerstag, 27.09.2018

Vibrational Dynamics of Metal Complexes in Different Electronic and Redox States

Zeit: 11:15 Uhr
Hörsaal: B116
 
Prof. Dr. Anthony Vlcek School of Biological and Chemical Sciences
Queen Mary University of London UK

Changing the electronic state redistributes electron density in a molecule while oxidation and reduction change its total electron count. Each of these processes affects the molecular structure, vibrational dynamics and coupling, as well as solvation; and these changes are clearly manifested in time-resolved and 2-dimensional IR spectroscopy. Photon absorption is followed by relaxation processes that result in by IR bands shifting and changing shape on a picosecond time scale. Oxidation or reduction often have similar vibrational effects as excitation, while 2D-IR spectroscopy shows that solvation dynamics depends on the oxidation state. These effects will be demonstrated using time-resolved and 2D IR spectra of rhenium and ruthenium – based molecular photosensitizers.

 
Donnerstag, 04.10.2018

No seminar

Zeit: 11:15 Uhr
Hörsaal: B116
 

 
Donnerstag, 11.10.2018

No seminar

Zeit: 11:15 Uhr
Hörsaal: B116
 

 
Donnerstag, 18.10.2018

No seminar

Zeit: 11:15 Uhr
Hörsaal: B116
 

 
Donnerstag, 25.10.2018

Dielectric Laser Acceleration - Theory, Applications and Experiments at SwissFEL (PSI)

Zeit: 11:15 Uhr
Hörsaal: B116
 
Benedikt Hermann, PhD Student, University of Bern/Paul Scherrer Institute PSI

In classical radio-frequency particle accelerators gradients are ultimately limited by the brake-down effect inside the cavity. At optical frequencies dielectric materials (e.g. fused silica, SiO2) can sustain surface electric fields 1-2 orders of magnitude higher than metals. A dielectric laser accelerator (DLA) is a periodic microstructure excited by light in the optical or NIR domain. Due to recent developments in laser technology, commercial laser systems are capable of producing femto-second laser pulses with peak-field amplitudes in the GV/m range in a compact device. In experiments at SLAC and UCLA average gradients of 850 MeV/m have been observed [1]. This talk will cover the concept of DLAs, their applications and experiments at SwissFEL in the scope of the Accelerator on a Chip International Program (ACHIP). [1] D. Cesar et al., High-field nonlinear optical response and phase control in a dielectric laser accelerator, 2018, https://www.nature.com/articles/s42005-018-0047-y

 
Donnerstag, 01.11.2018

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Zeit: 11:15 Uhr
Hörsaal: B116
 
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Donnerstag, 08.11.2018

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Zeit: 11:15 Uhr
Hörsaal: B116
 
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Donnerstag, 15.11.2018

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Zeit: 11:15 Uhr
Hörsaal: B116
 
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Donnerstag, 22.11.2018

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Zeit: 11:15 Uhr
Hörsaal: B116
 
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Donnerstag, 29.11.2018

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Zeit: 11:15 Uhr
Hörsaal: B116
 
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Donnerstag, 06.12.2018

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Zeit: 11:15 Uhr
Hörsaal: B116
 
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Donnerstag, 13.12.2018

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Zeit: 11:15 Uhr
Hörsaal: B116
 
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Donnerstag, 20.12.2018

tba

Zeit: 11:15 Uhr
Hörsaal: B116
 
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