J. Phys. IV France 114 (2004) 115
DOI: 10.1051/jp4:2004114024
Multiphoton absorption mechanism of TMTTF, its radical cation and soluble single wall carbon nanotubes
M. Meneghetti1, 1, G. Marcolongo1, N. Schiccheri1, M. Garbin1 and E. Menna21 Department of Physical Chemistry, University of Padova, Via Loredan 2, 35131 Padova, Italy
2 Department of Organic Chemistry, University of Padova, Via Marzolo 1, 35131 Padova, Italy
Abstract
Non linear absorption is a non linear optical property
which can be observed with large photon intensities and corresponds to
instantaneous or sequential absorption of more than one photon. Highly
polarisable molecules show high non linear optical activity and in the
following it will be presented the multiphoton absorption properties of
tetramethyltetratiafulvalene (TMTTF), its radical cation and pristine and
soluble single wall carbon nanotubes (SWNT). One finds that excited two
photon absorptions are active for nanosecond laser pulses at 532 nm with
very large absorption cross sections.
Key words. Non linear optics, non linear absorption, TMTTF, SWNT.
© EDP Sciences 2004