Title

Three- and four-photon absorption of a multiphoton absorbing fluorescent probe

Authors

Authors

F. E. Hernandez; K. D. Belfield; I. Cohanoschi; M. Balu;K. J. Schafer

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Appl. Optics

Keywords

FLUORENE DERIVATIVES; EXCITATION; MICROSCOPY; TRANSITIONS; Optics

Abstract

High-order multiphoton excitation processes are becoming a reality for fluorescence imaging and phototherapy treatment because they afford minimization of scattered light losses and a reduction of unwanted linear absorption in the living organism transparency window, making them less susceptible to photodamage, while improving the irradiation penetration depth and spatial resolution. We report the four-photon-excited fluorescence emission of (7-benzothiazol-2-yl-9,-didecylfluoren-2-yl)-diphenylamine in hexane and its four-photon absorption cross section sigma(4)' = 8.1 x 10(-109) cm(8) s(3) photon(-3) for the transition S-0 -- > S-1 when excited at 1600 nm with a tunable optical parametric generator (OPG) pumped by picosecond laser pulses. When pumped at 1200 run, three-photon absorption was observed, corresponding to the same transition. (C) 2004 Optical Society of America.

Journal Title

Applied Optics

Volume

43

Issue/Number

28

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

5394

Last Page

5398

WOS Identifier

WOS:000224355600015

ISSN

1559-128X

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