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Laser induced phenomena in .gamma.-glycine crystals

Wojciechowski A., Alzayed N., Kityk I., Berdowski J., Tylczyński Z.

Optica Applicata

2010

Vol. 40, nr 4

1007--1012

The photoinduced changes of absorption within the spectral range 200-800 nm and optical second harmonic generation caused by illumination by the cw second harmonic generation of the Nd:YAG laser (? = 532 nm) and power about 400 mW were investigated. We have established that increasing the time of illumination by the second harmonic generation of the Nd:YAG laser leads to the occurrence of one strong spectral minimum at 319 nm and another less strong at 420 nm. Increasing the time of illumination leads to a slight red spectral shift of the photoinduced minima. The absence of a substantial increase in temperature indicates that the principal role is played here by the photooccupation of the trapping levels. The effect is observed in a wide spectral range of the incident photoinduced angles, however, the beam should possess a good Gaussian-like form and to be space homogenous. The results were reproduced with precision up to 3-4% which was achieved due to additional stabilization of the photoinduced laser power by double control of the power.

Hydrogen-bonded organic solids with nonlinear optical properties

Ratajczak H., Debrus S., May M., Barycki J., Baran J.

Bulletin of the Polish Academy of Sciences. Chemistry

2000

Vol. 48, No. 3

189-192

Nonlinear Optical Properties for eight organic crystals (1-acetyloamino-1-phenyl methylphosphonous, 1- aminoethylphosphonic acid, [N-benzylamino)methyl] phenylo phosphonic acid, hippuric acid (benzaminoacetic acid), (+)-bromosuccinic acid, L-lysine, L-histidine) have been determined by the powder method.