Il mondo e l'arte di Federigo Tozzi / N. F. Cimmino

• Record Nr.: UNISALENTO991000082389707536
• Autore: Cimmino, Nicola Francesco
• Pubbl/distr/stampa: Roma : G. Volpe, 1966
• Descrizione fisica: 200 p. ; 23 cm
• Soggetti: Tozzi, Federigo - Biografia; Tozzi, Federigo - Opere - Studi
• Lingua di pubblicazione: Italiano
• Formato: Materiale a stampa
• Livello bibliografico: Monografia

Photoinduced modifications of the nonlinear optical response in liquid crystalline azopolymers : doctoral thesis accepted by the University of Zaragoza, Spain / / Rapuel Alicante

• Record Nr.: UNINA9910438110803321
• Autore: Alicante Raquel
• Pubbl/distr/stampa: New York, : Springer, 2013
• ISBN: 1-283-69759-9; 3-642-31756-1
• Edizione: [1st ed. 2013.]
• Descrizione fisica: 1 online resource (208 p.)
• Collana: Springer theses, , 2190-5053
• Disciplina: 621.36/61
• Soggetti: Nonlinear optics; Electromagnetic waves
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references.
• Nota di contenuto: Introduction and Basic Theory -- Experimental Methods.- Nonlinear Optical Molecular Response -- Piperazine Azopolymer Thin Films -- Films of Doped Low Polar Azopolymers -- Nonlinear Optical Gratings -- General Conclusions -- Appendices.
• Sommario/riassunto: Nonlinear optical (NLO) phenomena such as frequency conversion have played a key role in the development of photonic technologies. This thesis reports a detailed study of the molecular response of a large variety of push-pull organic compounds using the Second Harmonic Generation technique, which will serve as a starting point for the investigation at the macroscopic scale of azobenzene-based liquid crystalline polymeric films and their blends with highly efficient NLO chromophores. These materials are designed with the aim of exploiting their photo-addressability in order to tailor their nonlinear behaviour. The magnitude and symmetry of their nonlinear response was successfully controlled via light irradiation and thermal treatments. Moreover, as a specific application, the recording of efficient NLO gratings was achieved and is described here.