Objetivo The aim of this project is to apply a tuneable, 10 microns, short pulse, high power emission to study both the second harmonic generation (SHG) and third harmonic generation (THG) in different gases (SF6, CH4), new materials (nematic crystals, fullerens), polymers and semiconductors. Under strong power infrared lighting, the weak non-linear emissions (transmitted or reflected by the materials) will be filtered and analysed, in the time and frequency domain, to derive the non-linear polarizability and relaxation time. Besides this, to extend this infrared non-linear spectroscopy in another frequency range, the 10 microns pumping sources will be converted in the 5 microns region, by means of efficient non-linear materials as proustite.To attain this objective a tuneable 10 microns laser will be built, totally free from spurious non-linear signals and with a few-nanosecond pulse duration. In a further approach a CO2 amplified, picosecond ten microns pulse will be obtained by means of parametric conversion of a near infrared source, so that the dynamics of the non-linear effects can be analysed in the picosecond range. Alternatively, the ten microns sub-nanosecond pulse can be directly extracted from a high pressure CO2 oscillator by means of a neodymium laser. All these sources will be converted at 5 microns wavelength to perform the same non-linear spectroscopy in another frequency range. Programa(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Tema(s) 12 - Atomic Structure, Lasers and Optics Convocatoria de propuestas Data not available Régimen de financiación Data not available Coordinador Consiglio Nazionale delle Ricerche (CNR) Aportación de la UE Sin datos Dirección Via del Giardino 7 56100 Pisa Italia Ver en el mapa Coste total Sin datos Participantes (3) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo Moscow State University M.V. Lomonosov Rusia Aportación de la UE Sin datos Dirección 119899 Moscow Ver en el mapa Coste total Sin datos Università degli Studi di Napoli Federico II Italia Aportación de la UE Sin datos Dirección 80055 Portici Napoli Ver en el mapa Coste total Sin datos Universität Regensburg Alemania Aportación de la UE Sin datos Dirección 93053 Regensburg Ver en el mapa Coste total Sin datos
