Dichromatic laser photolysis of eosin in solid gelatinous matrix

Описание

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: 6th International Conference on Atomic and Molecular Pulsed Lasers; Tomsk, RUSSIA; Tomsk, RUSSIA

Год издания: 2004

Идентификатор DOI: 10.1117/12.562975

Ключевые слова: dye; photoreduction; energy yield; doubic-step exitation; laser photolysis

Аннотация: The laser irradiation of the thin films of solid solution of eosin in gelatinous matrix in the first and some upper dyes absorption bands leads to decrease of films optical density due to reaction of photoreduction. In the paper the kinetic of photoreduction of the dye eosin K in polymeric matrix in three cases of irradiation was eПоказать полностьюxperimentally investigated: a) irradiation by N-2 laser (lambda=337nm, second band of absorption, tau = 2 nsec, repetition rate - 100 Hz, average power - 2,2 mW), b) irradiation by Ar- laser (lambda=488 nm, first band of absorption, 6,5-12 mW), c) under a simultaneous action of both Ar- and N-2-lasers. It was demonstrated that the most effective reaction of photoreduction took place in case of direct populating of upper singlet states with probable following nonradiative transition into equienergetic triplet states (energy range 35000 - 45000 sm(-1)).

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Издание

Журнал: ATOMIC AND MOLECULAR PULSED LASERS V

Выпуск журнала: Vol. 5483

Номера страниц: 147-151

ISSN журнала: 0277786X

Место издания: BELLINGHAM

Издатель: SPIE-INT SOC OPTICAL ENGINEERING

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