Title

Three- And Four-Photon Absorption Of A Multiphoton Absorbing Fluorescent Probe

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 σ4′ = 8.1 × 10-109 cm8 s3 photon-3 for the transition S0 → S1 when excited at 1600 nm with a tunable optical parametric generator (OPG) pumped by picosecond laser pulses. When pumped at 1200 nm, three-photon absorption was observed, corresponding to the same transition. © 2004 Optical Society of America.

Publication Date

10-1-2004

Publication Title

Applied Optics

Volume

43

Issue

28

Number of Pages

5394-5398

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/AO.43.005394

Socpus ID

5444248141 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/5444248141

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