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Proceedings Paper

Single and double photon excitation of dyes in highly scattering media of biological significance
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Paper Abstract

The coherent properties of the temporally and spectrally narrowed emission of organic dyes hosted inside artificial scattering matrices, after one- and two-photon excitation, were investigated by performing photon-counting measurements. The excitation source was a frequency doubled 200 femtosecond pulsed laser emitting at 400 nm for one- photon or the 800 nm fundamental emission for two-photon excitation. Spectral and temporal features were simultaneously recorded using a spectrograph and a streak camera operating on the photon counting mode. Photon number distributions were thus created. The temporal coherence of the laser-like emission above and bellow the excitation energy threshold has been investigated from the photon number distributions obtained.

Paper Details

Date Published: 16 July 2002
PDF: 9 pages
Proc. SPIE 4707, Saratov Fall Meeting 2001: Optical Technologies in Biophysics and Medicine III, (16 July 2002); doi: 10.1117/12.475626
Show Author Affiliations
Giannis Zacharakis, Foundation for Research and Technology-Hellas (Greece)
Theodore G. Papazoglou, Foundation for Research and Technology-Hellas (Greece)


Published in SPIE Proceedings Vol. 4707:
Saratov Fall Meeting 2001: Optical Technologies in Biophysics and Medicine III

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