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1
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Solute-Solvent Interaction in Aqueous Solutions Studied by Optical Kerr Effect

100%
Błaszczak Z., Farhoud M.
Acta Physica Polonica A
|
1997
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vol. 91
|
issue 3
531-541
EN
Solute-solvent interactions were studied by a method based on laser induced optical birefringence in aqueous solutions. The paper reports results of the optical Kerr constant measurements for binary liquid mixtures of aqueous solution of methanol, ethanol, n-propanol and acetone at room temperature in a wide range of concentrations. At 50% concentration of the above mentioned alcohols, the temperature dependence of the laser induced optical birefringence was also measured in the range from 283 K to 315 K. These data together with the density and refractive index were used to calculate the optical and specific Kerr constants. Moreover, these data enabled the calculation of the anisotropic factors, optical anisotropy and orientation function of the substances studied.
2
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Circularly Polarized Light-Induced Axial Anisotropy in Achiral Isotropic Media. Magnetic Dipole Interaction with Radiation

100%
Woźniak S.
Acta Physica Polonica A
|
1994
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vol. 85
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issue 6
899-905
EN
The analytical explanation of axial birefringence revealed earlier by the technique of field applied molecular dynamics computer simulation is given. The point group symmetries of achiral molecules admitting the effect are determined and the estimation of the anisotropy is presented. The effect may give information on off-diagonal elements of the Rosenfeld polarizability tensor of achiral molecules.
3
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The Stochastic Mode of the Modulated Structure in [N(CH_3)_4]_2MeCl_4 Dielectric Crystals

80%
Sveleba S., Semotyuk O., Katerynchuk I., Furgala Y., Pankivskyi Y.
Acta Physica Polonica A
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2006
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vol. 109
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issue 6
695-700
EN
Temperature behavior of the optical birefringence in the transitional regions of the incommensurate phase of [N(CH_3)]CuCl_4 was studied. Temperature dependencies of the modulated structure wave vector and of the specific heat in these regions were analyzed. The stochastic mode of the incommensurate modulated structure in [N(CH_3)]MeCl_4 (Me = Cu, Fe) dielectric crystals was discovered.
4
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Methods of Determining the Beat Length of Planar Waveguides

80%
Gut K.
Acta Physica Polonica A
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2013
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vol. 124
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issue 3
425-427
EN
The paper presents two methods of determining the planar waveguide birefringence and the measuring stands, which are used to determine the beat length of planar waveguide structures. The light is introduced into the waveguide through a prism coupler. The first method applies measurements of scattered light. The second method uses an immersion coupler. The most fundamental property of an immersion coupler is the possibility to change fluently the propagation length while immersing the waveguide.
5
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Magneto-Optical Characteristics of Human Serum

80%
Surma M., Bućko J., Bąk G., Ciszek M.
Acta Physica Polonica A
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2000
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vol. 98
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issue 5
533-542
EN
A study of magneto-optical circular birefringence of human serum from healthy subjects and cancer patients was performed. Significant differences in the magnetic field induced change of the natural optical activity of serum from healthy blood donors and neoplasmic patients were noted. The natural optical activity of blood is positive, irrespective of the donor health status, whereas the magnetic field induced (B > 10T) change in the natural optical activity of the serum from cancer patients is negative while that from healthy donors is positive. The value and sign of the characteristic magneto-optical marker of human serum was discovered in a study of the influence of very high magnetic fields on chiral media and interpreted on the basis of the recent developments in the theory of magnetic field induced optical circular birefringence in the media revealing natural optical activity. The blood serum is a chiral medium.
6
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The Application of Scattered Light in the Metrology of Planar Waveguides

80%
Gut K.
Acta Physica Polonica A
|
2012
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vol. 122
|
issue 5
818-820
EN
The paper presents a measuring stand which permits to determine the attenuation and modal birefringence of planar waveguide structures. The light is introduced into the waveguide through a prismatic coupler. This permits to determine attenuations of the subsequent modes. Mounting the polarizer in front of the lens of the camera it becomes possible to determine on the same test stand the modal birefringence of orthogonal pair of modes of the same order.
7
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Influence of Refractive Indices Dispersion on Parameters of Imaging AOTFs Operating with Non-Polarized Light

61%
Yukhnevich T., Voloshinov V., Pritulenko I.
Acta Physica Polonica A
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2015
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vol. 127
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issue 1
78-80
EN
The paper presents results on investigation of paratellurite based imaging tunable acousto-optic filters operating with arbitrary polarized light. We analyzed influence of dispersion of refractive indices in the crystal on a simultaneous satisfaction of the Bragg matching condition for ordinary and extraordinary polarized optical beams. The analysis was carried out at different optical wavelengths over the wide tuning range of the filters 400-1150 nm. Theoretical and experimental analysis of the problem proves that in a paratellurite tunable acousto-optic filter, the Bragg matching angle common for the two optical polarizations is varying in the limits up to 0.3°. This variation of the incidence angle may be as wide as a quarter of the filter angular aperture thus proving that the examined phenomenon should be considered in design of the imaging tunable acousto-optic filters.
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