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1 Opto-Electronics Review

1 2005

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Second harmonic generation in Ru-derivative chromophores incorporated within PMMA polymers stimulated by acoustic and optic fields

Migalska-Zalas A., Kityk I. V., Sahraoui B.

Opto-Electronics Review

2005

Vol. 13, No. 2

141-145

We have demonstrated the co-existences of second harmonic generation (SHG) and χ (2) grating using acoustical and optical fields in Ru derivatives incorporated within the PMMA polymer matrices. The investigated compounds possess metastable trapping levels originated both from the d-states of Ru as well as the effective charge transfers due to the presence of p-conjugated states. The investigated compounds possess long-lived χ (2) grating which decreases less than 76% under 600 min of laser treatment. Electrostatic field causes additional reanimation of the SHG. Values of the acoustically induced optical second harmonic generation (AIOSHG) for the best Ru chromophres were substantially higher than for known pure inorganic materials. The effective value of the second-order optical susceptibility for the wavelength 1.89 um is about 1.94 pm/V. With increasing acoustical power, the AIOSHG for fundamental YAB-Gd laser light (λ = 1.76 um) increases and achieves its maximum value at acoustical power density of about 1.45 W/cm2.