Magyar Tudományos Akadémia
Atommagkutató Intézet

High-harmonics generation in dielectrics

Szeminárium High-harmonics generation in dielectrics
Előadó

Christoph Lemell

Inst. for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstraße 8-10, A-1040 Vienna, Austria, EU
Kapcsolattartó Dr. Tőkési Károly
Időpont 2017-11-14 11:00
Helyszín MTA Atomki, nagyelőadó (Debrecen, Bem tér 18/c, XII. épület 3. emelet)
Esemény leírása


We have developed an ab-initio multi-scale simulation for the
generation of solid-state high harmonics self-consistently. We combine
the microscopic non-linear response treated within the frameworks of
TDDFT or multiband Bloch equations with mesoscopic propagation and
source distribution effects providing novel insights in HHG in solids.
Microscopic simulation of the non-linear response of a single cell of
the periodic system alone fails to yield a well-defined harmonic
spectrum irrespective of the level of the underlying approximation.
We find the spatio-temporal distribution of the emission events on the
mesoscopic scale to lead to the formation of a clean high-harmonic
spectrum with pronounced peaks at odd harmonics by way of
interference.