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Proceedings Paper

Anisotropy of third-order nonlinear optical responses in fluorescein derivatives by electroabsorption spectroscopy
Author(s): Taeyong Noh; Takashi Isoshima; Takeshi Ogawa; Tatsuo Wada; Hiroyuki Sasabe
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Paper Abstract

Anisotropy of third-order nonlinear optical properties in di-n-butyl fluorescein derivatives was investigated by electroabsorption spectroscopy. In a series of fluoresceins, the derivatives with Cl substitution at phenyl ring presented a new intense absorption band at the wavelength range from 550 to 620 nm, which is at longer wavelength side of the main absorption band in other derivatives. This new absorption band was attributed to intramolecular charge transfer transition due to Cl substitution at the phenyl ring, according to the spectral profile of electroabsorption which was proportional to the second derivative of linear absorption spectrum. Polarization dependence of normalized absorption coefficient was about 2:1 at the main absorption band in all derivatives. However, in the charge transfer transition band, the polarization dependence was about 1:1,2, suggesting that the charge transfer direction is nearly perpendicular to the otpical transition. This result is consistent with structural aspect that the charge transfer direction is located along to the bond between the Cl-substituted phenyl ring and condensed ring, while the optical transition is along to the longitudinal axis of the condensed ring.

Paper Details

Date Published: 11 October 1999
PDF: 10 pages
Proc. SPIE 3796, Organic Nonlinear Optical Materials, (11 October 1999); doi: 10.1117/12.368270
Show Author Affiliations
Taeyong Noh, RIKEN-The Institute of Physical and Chemical Research (Japan)
Takashi Isoshima, RIKEN-The Institute of Physical and Chemical Research and Japan Science and Technology Cor (Japan)
Takeshi Ogawa, Univ. Nacional Autonoma de Mexico (Mexico)
Tatsuo Wada, RIKEN-The Institute of Physical and Chemical Research and Japan Science and Technology Cor (Japan)
Hiroyuki Sasabe, RIKEN, Japan Science and Technology Corp., and Chitose Institute of Science and Technology (Japan)


Published in SPIE Proceedings Vol. 3796:
Organic Nonlinear Optical Materials
Manfred Eich; Manfred Eich; Mark G. Kuzyk, Editor(s)

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