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Proceedings Paper

Surface enhanced SHG from macrocycle, catenane and rotaxane thin films: experiments and theory
Author(s): Imad Arfaoui; Veronika Bermudez; Celine De Nadai; Jukka-Pekka Jalkanen; Francois Kajzar; David Leigh; Monika Lubomska; Sandra M. Mendoza; Jacek Niziol; Petra Rudolf; Francesco Zerbetto
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Paper Abstract

Surface enhanced second harmonic generation experiments on supramolecules: macrocycles, catenanes and rotaxanes, monolayers and multilayers deposited by vacuum evaporation on silver layers are reported and described. The measurements show that the molecules are ordered in thin films. The highest order is observed in the case of macrocycles and the lowest in thin films of fumaramide [2] rotaxanes. Also a better ordering is observed in the case of monolayers. The observed second harmonic generation activity is interpreted in terms of electric field induced second harmonic generation. The electric field contributing to SHG signal is created by silver atoms on the surface of silver layers. The measured second order NLO susceptibilities for a fumaramide [2] rotaxane is compared with that obtained by considering only EFISH contribution to SHG intensities. The electric filed on the surface of silver layer is calculated using TINKER molecular mechanics/dynamics software and the Embedded Atom model. An excellent agreement is observed between the calculated and the measured SHG susceptibilities.

Paper Details

Date Published: 4 April 2005
PDF: 10 pages
Proc. SPIE 5724, Organic Photonic Materials and Devices VII, (4 April 2005); doi: 10.1117/12.592379
Show Author Affiliations
Imad Arfaoui, Univ. of Groningen (Netherlands)
Veronika Bermudez, CEA Saclay (France)
Celine De Nadai, Univ. Notre-Dame de la Paix (France)
Jukka-Pekka Jalkanen, Univ. di Bologna (Italy)
Francois Kajzar, CEA Saclay (France)
David Leigh, Univ. of Edinburgh (United Kingdom)
Monika Lubomska, Univ. of Groningen (Netherlands)
Sandra M. Mendoza, Univ. of Groningen (Netherlands)
Jacek Niziol, CEA Saclay (France)
Petra Rudolf, Univ. of Groningen (Netherlands)
Francesco Zerbetto, Univ. di Bologna (Italy)


Published in SPIE Proceedings Vol. 5724:
Organic Photonic Materials and Devices VII
James G. Grote; Toshikuni Kaino; Francois Kajzar, Editor(s)

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