Nonlinear optical waveguide spectroscopy of a conjugated polymer: poly(p-phenylenevinylene)
JOSA B, Vol. 16, Issue 11, pp. 1921-1935 (1999)
http://dx.doi.org/10.1364/JOSAB.16.001921
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Abstract
We have measured intensity-dependent prism coupling of poly(p-phenylenevinylene) thin films with picosecond laser pulses in the range 750–1600 nm. We developed a refined evaluation method that yields the signs and absolute values of the nonlinear refractive index n_{2} and the nonlinear absorption coefficient α_{2}. Strong two-photon absorption levels were found at 2.8 and 3.1 eV. We observed a resonance at 1.3 eV that behaves as saturable absorption, and several additional resonances and sign changes of n_{2} at even lower photon energies. We demonstrate reversible refractive-index changes Δn=+0.002 at 910–950 nm on a picosecond time scale. Even larger Δn appear feasible.
© 1999 Optical Society of America
OCIS Codes
(130.0130) Integrated optics : Integrated optics
(130.2790) Integrated optics : Guided waves
(160.5470) Materials : Polymers
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(190.4400) Nonlinear optics : Nonlinear optics, materials
(310.2790) Thin films : Guided waves
Citation
K. Ueberhofen, A. Deutesfeld, K. Koynov, and C. Bubeck, "Nonlinear optical waveguide spectroscopy of a conjugated polymer: poly(p-phenylenevinylene)," J. Opt. Soc. Am. B 16, 1921-1935 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-11-1921
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