HINTS

Nonlinear spectroscopy with high power THz waves

Coordinatore	UNIVERSITE DE GENEVE    more  Organization address address: Rue du General Dufour 24 city: GENEVE postcode: 1211 contact info Titolo: Prof. Nome: Jean-Pierre Cognome: Wolf Email: send email Telefono: +41 22 3796594 Fax: +41 22 3793980
Nazionalità Coordinatore	Switzerland [CH]
Totale costo	246˙905 €
EC contributo	246˙905 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2010-IIF
Funding Scheme	MC-IIF
Anno di inizio	2011
Periodo (anno-mese-giorno)	2011-07-05   -   2013-07-04

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITE DE GENEVE  Organization address address: Rue du General Dufour 24 city: GENEVE postcode: 1211 contact info Titolo: Prof. Nome: Jean-Pierre Cognome: Wolf Email: send email Telefono: +41 22 3796594 Fax: +41 22 3793980	CH (GENEVE)	coordinator	246˙905.00

Mappa

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 Obiettivo del progetto (Objective)

'The characteristic energy of many fundamental processes in molecules and condensed matter lies in the terahertz (THz) frequency range; examples include biologically important collective vibrations of proteins, crystal lattice resonance oscillations, electron transitions in semiconductor nanostructures, and Cooper pairs formation in superconductors. Nonlinear THz spectroscopy can provide new information about these processes. However, very few studies on nonlinear THz spectroscopy have been published to date, in contrast to the large number of studies on nonlinear spectroscopy in the visible range. One of the main reasons limiting the development of nonlinear THz spectroscopy is the lack of available sources of high-power THz radiation. Many previous studies on THz nonlinear spectroscopy have been performed using accelerator-based sources. However, these sources present the typical drawbacks associated with large-scale facilities. A few laser-driven table-top THz generation techniques have been proposed and realized. Usually the power of the THz waves delivered this way is relatively weak. Since 2003, I have actively worked on the development of the tilted-pulse-front pumping THz generation scheme originally proposed by J. Hebling in 2002. This method allows to efficiently scaling up the energy of single-cycle THz pulse. Very recently, in two joint experiments with the host group, I have demonstrated the generation of the highest energy single-cycle THz pulses to date produced with a laser-based approach. As a continuation of this preliminary demonstration, during this project I plan to exploit the unique high-power laser facility of the host group and develop a permanent laser-driven platform for obtaining high power ultrashort THz pulses with variable parameters for performing nonlinear spectroscopy in the THz frequency range. In particular, I intend to study THz nonlinear properties of new metamaterials and nonlinear interaction of THz waves and laser filaments.'

Introduzione (Teaser)

Scientists have developed a novel laser-based spectroscopic set-up operating at frequencies relevant to non-linear phenomena in many materials. It is already opening a window on molecular interactions and electron transport in semiconductors.