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Aberrations of Betanin Sensitized Gelatin Microlenses

100%
Vasiljević D., Murić B., Pantelić D., Panić B.
Acta Physica Polonica A
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2009
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vol. 116
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issue 4
592-594
EN
Aberrations of the concave aspherical microlenses are presented. Microlenses are produced by using betanin sensitized gelatin and 532 nm laser irradiation (2nd Nd:YAG harmonic). Aberrations are analyzed by calculation of the longitudinal spherical aberration and the root mean square RMS spot radius. Three presented microlenses had good image quality for the large F number and the moderate field angle.
2
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Imaging Properties of Laser-Produced Parabolic Profile Microlenses

100%
Vasiljević D., Murić B., Pantelić D., Panić B.
Acta Physica Polonica A
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2007
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vol. 112
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issue 5
993-999
EN
Imaging properties of the concave microlens are presented. Microlenses are produced by using tot'hema eosin sensitized gelatin and 532 nm laser irradiation (2nd Nd:YAG harmonic). Imaging properties of microlenses are analized by calculation: the RMS wave front aberration, the diffraction point spread function cross section and the spot diagram. The obtained microlenses had excellent, near diffraction limited, performance for the moderate field angles.
3
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Effect of Laser Light Ellipticity on Hanle Electromagnetically Induced Absorption Amplitude and Line Width

76%
Dimitrijević J., Grujić Z., Mijailović M., Arsenović D., Panić B., Jelenković B.
Acta Physica Polonica A
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2007
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vol. 112
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issue 5
841-845
EN
Using the ^2S_{1/2} F_g=2→^2P_{3/2} F_e=3 transition in ^{87}Rb, we analyzed the interaction between the arbitrarily polarized laser light and Zeeman sublevels in the Hanle configuration. We studied theoretically and confirmed experimentally that the effect of the laser light polarization on the electromagnetically induced absorption strongly depends on the laser light power. For the same atomic transition, and for single laser light power (3 mW), it was recently shown that electromagnetically induced absorption line widths increase with polarization ellipticity and that electromagnetically induced absorption amplitude has maximum for certain laser light polarization different than linear. Here, we present results for amplitudes and widths of electromagnetically induced absorption for different laser light polarizations and for the laser light power≤ 200μW. It is verified that for small laser light power maximal electromagnetically induced absorption amplitude is for the linear polarization, whereas for larger power maximum of the electromagnetically induced absorption is at higher polarization ellipticity.
4
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Holographic Measurement of Dental Tissue Contraction and Stress, due to Postpolymerization Reaction

76%
Pantelić D., Blažić L., Savić-Šević S., Murić B., Vasiljević D., Panić B., Belić I.
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EN
Polymerization contraction of dental photo-polymer composites induces internal stress, in a tooth cavity. This stress is measured indirectly by, first, holographic determination of tooth deformation, with consequent calculation of stress using finite element method. Real time holographic technique enabled observation of dental deformation in all stages of polymerization. Specially constructed blue-LED light source was used to polymerize photopolymer composite. We have found that polymerization continues even after illumination is over. Consequently, stress is increased, too.
5
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Zeeman Coherences Narrowing due to Ramsey Effects Induced by Thermal Motion of Rubidium Atoms

64%
Grujić Z., Mijailović M., Panić B., Minić M., Kovačević A., Obradović M., Jelenković B., Cartaleva S.
Acta Physica Polonica A
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2007
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vol. 112
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issue 5
799-803
EN
We investigated effects of spatially separated laser fields on amplitudes and widths of electromagnetically induced transparency in M-type atomic system. We have shown narrowing of the electromagnetically induced transmission resonance and therefore enhancement of medium non-linearities that can be explained by diffusion-induced Ramsey narrowing. Depending on the polarization of two laser beams, narrow probe Hanle transmission resonance changes its sign in respect of the profile obtained when the pump laser beam is off.
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