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Proceedings Paper

Femtosecond terahertz dynamics of cooperative transitions: from charge density waves to polariton condensates
Author(s): M. Porer; J.-M. Ménard; C. Poellmann; H. Dachraoui; L. Mouchliadis; I. E. Perakis; U. Heinzmann; J. Demsar; K. Rossnagel; E. Galopin; A. Lemaître; A. Amo; J. Bloch; R. Huber
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Paper Abstract

Many-body correlation effects in complex quantum systems often lead to phase transitions that bear great technological potential. However, the underlying microscopic driving mechanisms or even the quantum-mechanical properties of the novel ground state often remain elusive. Here we employ phase-locked ultrabroadband terahertz (THz) pulses to disentangle two coexisting orders in the charge density wave phase 1T-TiSe2 via their individual non-equilibrium multi- THz dynamics. Furthermore, we demonstrate that few-cycle THz pulses can project out the matter part of a transient cold exciton-polariton condensate, providing novel insights into the very nature of this macroscopic quantum state.

Paper Details

Date Published: 13 May 2016
PDF: 8 pages
Proc. SPIE 9835, Ultrafast Bandgap Photonics, 98351H (13 May 2016); doi: 10.1117/12.2219583
Show Author Affiliations
M. Porer, Univ. Regensburg (Germany)
Paul Scherrer Institut (Switzerland)
J.-M. Ménard, Univ. Regensburg (Germany)
C. Poellmann, Univ. Regensburg (Germany)
H. Dachraoui, Univ. Bielefeld (Germany)
L. Mouchliadis, Univ. of Crete (Greece)
I. E. Perakis, Univ. of Crete (Greece)
U. Heinzmann, Univ. Bielefeld (Germany)
J. Demsar, Ilmenau Univ. of Technology (Germany)
K. Rossnagel, Univ. of Kiel (Germany)
E. Galopin, Lab. de Photonique et de Nanostructures, CNRS (France)
A. Lemaître, Lab. de Photonique et de Nanostructures, CNRS (France)
A. Amo, Lab. de Photonique et de Nanostructures, CNRS (France)
J. Bloch, Lab. de Photonique et de Nanostructures, CNRS (France)
R. Huber, Univ. Regensburg (Germany)

Published in SPIE Proceedings Vol. 9835:
Ultrafast Bandgap Photonics
Michael K. Rafailov; Eric Mazur, Editor(s)

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