[en] Energetic correlations and their dynamics govern the fundamental properties of condensed matter materials. Ultrafast multidimensional spectroscopy in the mid infrared is an advanced technique to study such coherent low-energy dynamics. The intrinsic many-body phenomena in functional solid-state materials, in particular few-layer samples, remain widely unexplored to this date, because complex and weak sample responses demand versatile and sensitive detection. Here, we present a novel setup for ultrafast multidimensional spectroscopy with noncollinear geometry and complete field resolution in the 15–40 THz range. Electric fields up to few-100 kV cm−1 drive coherent dynamics in a perturbative regime, and an advanced modulation scheme allows to detect nonlinear signals down to a few tens of V cm−1 entirely background-free with high sensitivity and full control over the geometric phase-matching conditions. Our system aims at the investigation of correlations and many-body interactions in condensed matter systems at low energy. Benchmark measurements on bulk indium antimonide reveal a strong six-wave mixing signal and map ultra- fast changes of the band structure with access to amplitude and phase information. Our results pave the way towards the investigation of functional thin film materials and few-layer samples.
Disciplines :
Physics
Author, co-author :
Deckert, Thomas ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Allerbeck, Jonas; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit > Department of Physics and Materials Science, Universite du Luxembourg, 162a Avenue de la Faïencerie, 1511 Luxembourg, Luxembourg
Kurihara, Takayuki; The University of Tokyo, 277-8581, 5-1-5 Kashiwanoha, Kashiwa, Chiba, Japan > Institute for Solid State Physics
Brida, Daniele ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
External co-authors :
yes
Language :
English
Title :
Ultrafast multidimensional spectroscopy with field resolution and noncollinear geometry at mid-infrared frequencies
Publication date :
07 February 2022
Journal title :
New Journal of Physics
ISSN :
1367-2630
Publisher :
Institute of Physics Publishing, Bristol, United Kingdom