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Proceedings of CAOL'2003. 1st International Conference on Advanced Optoelectronics and Lasers. Jontly with 1st Workshop on Precision Oscillations in Electronics and Optics (IEEE Cat. No.03EX715)
The wide use of the laser and light therapy allows to accumulate the huge practical material on application of the low-level electromagnetic field effect in various medicine spheres. We are going to clarify the prima facie seeming contradictory experimental observations as most of them may be explained by the field model, which treats the registered effects as a field disturbance of human organism...
In current investigations the human body response on low level laser radiation is presented for a spectral range from 430 up to 830 nm. In experiments the tissue optical properties alteration was registered by the measurements of the kinetics of the backscattered radiation spectral intensity changing for different irradiating sources (lasers, LEDs, heat sources). The statistical analysis of the achieved...
The monitoring system for laser vaporization of biotissues based on autodyne detection method of backscattered radiation with the help of high-frequency pumping CO2 laser was developed. It was shown that this method gives the possibility to determine the instant of laser beam passage through tissue layers boundary in real-time. The magnitudes of integrated intensity of power spectrum (UPS) and weighted...
An effective method to obtain exact analytical solutions of dynamical equations for multilevel quantum systems in high-power laser fields is presented. The method is based on the use of integral transforms with orthogonal polynomials. Exact solutions are obtained that describe excitation dynamics of various multilevel models with different position of energy levels, with various dependence of dipole...
This paper is devoted to application medical ozone influence on morphology of blood erythrocytes of patients with neurosensor hardness of hearing using holographic interference microscope. From the experimental results, it was found that erythrocytes of all patients before treatment had "flat disc" shapes. After the injections of ozonized physiological solution blood erythrocytes changed...
With the aim to find out mechanism of low-intensive laser radiation (LILR) effect on autoimmune thyreoiditis (AIT) pathogenesis we have done researches at 30 Shinshilla ralbits with experimental AIT (EAIT). Laser radiation was done by the Mustang-Bio apparatus (Russia), the wavelength 0,89 mum, the power 5 Wt in impulse, the frequency 80 Hz, the exposition on thyroid gland projection for 30 sec.,...
As usual the tissue optical properties suppose invariable during the measurement interval in most medical diagnostic applications. The last affirmation based on a fact of low radiation intensity, which excludes its influence on the diagnostic process. But recent experimental investigations show that the low level optical fields may stimulate the alteration of the tissue optical state, thus, such an...
The DCM (4-dicyanomethylene-2-methyl-6-p-dimethylaminostyryl-4H-pyran) dye molecule is known as one of the best laser dyes. The photodynamics of that dye and its three fluorinated derivatives in polar and nonpolar solvents using nanosecond and picoseconds spectroscopies has been investigated. It was found the large difference in photophysical and laser properties of DCM and fluorinated derivatives...
For investigation of the nonradiative transitions in excimers we used the adiabatic approximation. The adiabatic potential of the excited electron-vibrational state has the minimum on the normal coordinate, and the adiabatic potential of the ground electron-vibrational state of excimer molecule is presented as the repulsive potential. The electron-vibrational system in model of two electron terms...
The problem of the irreversible interaction light and matter has a long history. The problem of the interaction light with classical crystals in the self-absorption range is now practically unknown. In the modern radiation physics the problem of the creation damages after optical irradiation the crystals is insufficiently known too. For the resolution of this problem, relaxed optics was created. For...
In the present paper the influence of the squeezed vibrational state on the transfer of the energy of the electronic excitation in the molecular systems is investigated. The probability of the transfer of the energy in unit of time in the lowest order on interaction (V) between molecules is determined by the correlation function of the operators of interaction
Experimental and theoretical investigations of several nonlinear optical processes originating on the periodical metal surface are presented. To enhance the signal (the local electromagnetic field) we use femtosecond packets of surface electromagnetic waves (SEW), propagating in definite directions. Special noncollinear geometry of SEW interaction leads to nonlinear optical signal gain in one-two...
The spectra of quasiparticles which are not interacting with phonons are obtained for the model of rectangular wells and the effective mass approximation. The calculation of the quasiparticle spectra renormalized due to the interaction is performed using the Feinman diagram technique for the temperature Green functions. This method opened the ability to investigate the case of weak, middle and tight...
The present review report is devoted to physics of 2H-Pbl2 layered single crystals with hydrazine nanoparticles. The reflection, photoluminescence (PL) and Raman scattering spectra of these substances will be considered. We used for the investigation the Bridgman-grown 2H-Pbl2 layered single crystals because they are classical compounds for intercalation. As intercalant we took advantage of dehydrated...
In this work we made an attempt of a direct experimental study of the hole capture by the resonant impurity level(s) in the strong enough electric field in p-Si. The idea was to investigate the modulation of the light absorption for boron-doped Si under the applied electric field. The change in the absorption for optical transitions between impurity states in the energy gap and between ground and...
In work the results of an experimental research of optical spectra of nanocomposites based on superdispersed particles of iron, its compounds, and also high pressure polythene matrix are given. Samples were synthesized by the method described in and represented plates by thickness 0,4-0,5 mm made by a method of mechanical hot pressing. The transmission and reflection spectrums of samples were measured...
In the paper, the influence of high doping on the energy spectrum and electron transport characteristics of n-i-p-i crystals is determined taking into account the Gaussian and exponential character of the fluctuated energy states. Influence of the impurity correlation on the D/mu ratio is examined in detail. Data of self-consistent calculations of the Schrodinger and Poisson's equations are presented...
Probes for a scanning near-field optical microscope on the base a single-mode adiabatically tapered optical fiber have been fabricated by the chemical etching only. The transmission coefficient of light in this probes is 2-3 order magnitude higher than that of mechanical pulled fibres probes. The probes may be used for green (lambda=0.48-0.55 mum), red (0.60-0.68 mum) and near infrared (0.78-1.05...
Doping superlattices, or n-i-p-i crystals, have advanced properties for the development of novel optoelectronic devices. The delta-doping technology extends possibilities of the superlattice design and allows improving the characteristics compared with homogeneously doped n-i-p-i structures. For the delta-doping, molecular-beam epitaxy is most widely applied. The GaAs delta-doped superlattices were...
The temporal shape of ruby laser pulse is experimentally investigated in the cavity typical for the intracavity processing of Al-film evaporated on the glass substrate. This results in forming of the train of nanosecond pulses with nearly 100% modulation. It is shown the possibility to form nanosized periodic surface structures by single-pulse ruby laser treatment
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