Title :
Two-photon recording of stable luminescent centers in chromone-doped polymer films
Author :
Ayt, A. ; Barachevsky, V.A. ; Kobeleva, O.I. ; Valova, T.M. ; Gagarskiy, S.V. ; Kiyko, V.V. ; Sergeev, A.N. ; Veniaminov, A.V. ; Zakharov, V.V. ; Krayushkin, M. ; Iglev, Hristo
Author_Institution :
Photochem. Center, Moscow, Russia
fDate :
June 30 2014-July 4 2014
Abstract :
The study defines threshold values of energy density required for two-photon writing of stable fluorescent bit patterns within polymer layers containing chromones class chemical compounds by visual laser pulses in range of pulse widths from nanoseconds to femtoseconds. Photo-regrouping of non-luminescent chromones to fluorescent products is shown as the result of true type two-photon absorption (TPA) and stepwise TPA as well. In the latter case writing beam fluence can be reduced due to increase of the effective TPA coefficient, but laser-induced thermal damage of matrix becomes more probable too.
Keywords :
fluorescence; high-speed optical techniques; optical films; optical polymers; polymer films; two-photon spectra; TPA coefficient; chromone-doped polymer films; energy density; fluorescent products; laser-induced thermal damage; photo-regrouping; stable fluorescent bit patterns; stable luminescent centers; two-photon absorption; two-photon recording; two-photon writing; visual laser pulses; writing beam fluence; DVD; chromone; fluorescence; information recording; laser induced damage; two-photon absorption;
Conference_Titel :
Laser Optics, 2014 International Conference
Conference_Location :
Saint Petersburg
Print_ISBN :
978-1-4799-3884-1
DOI :
10.1109/LO.2014.6886252
