Reference : Ultrafast multidimensional spectroscopy with field resolution and noncollinear geomet...

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/50620

Title :	Ultrafast multidimensional spectroscopy with field resolution and noncollinear geometry at mid-infrared frequencies
Language :	English
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) >]
Publication date :	7-Feb-2022
Journal title :	New Journal of Physics
Publisher :	Institute of Physics Publishing
Peer reviewed :	Yes (verified by ORBilu)
ISSN :	1367-2630
City :	Bristol
Country :	United Kingdom
Abstract :	[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.
Permalink :	http://hdl.handle.net/10993/50620
DOI :	10.1088/1367-2630/ac4a16

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