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Proceedings Paper

Excited-state hyper-Rayleigh scattering measurements of organic molecules
Author(s): Atsushi Harada; Toshihiko Nagamura
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Paper Abstract

Optical enhancement or decrease of the nonlinear optical (NLO) properties of organic compounds is expected at the excited state due to changes in dipole moments and oscillator strength caused by electron density distribution different from that at the ground state. It is necessary to evaluate NLO properties at the excited state in development and practical application of highly functional organic molecules. A novel excited state hyper-Rayleigh scattering (HRS) measurement system was constructed to evaluate hyperpolarizability (beta) at the excited state of molecules in solutions. The system is composed of a ns Nd:YAG probe laser of various intensities and a ns tunable pump laser for excitation. The HRS intensity at 2(omega) for p-nitoaniline in methanol solutions, proportional to the square of the incident laser power, increased upon excitation at 464nm and also depended on the delay time between a pump and a probe pulse. The (beta) value for p-nitroaniline at the excited triplet state was evaluated.

Paper Details

Date Published: 29 October 1998
PDF: 8 pages
Proc. SPIE 3474, Second-Order Organic Nonlinear Optics, (29 October 1998); doi: 10.1117/12.328568
Show Author Affiliations
Atsushi Harada, Shizuoka Univ. (Japan)
Toshihiko Nagamura, Shizuoka Univ. (Japan)


Published in SPIE Proceedings Vol. 3474:
Second-Order Organic Nonlinear Optics
Manfred Eich, Editor(s)

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