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3 Federal dedicated program "State support of integration of higher education and
fundamental science on 1997 - 2000"
5 About a course of realization of the federal dedicated program "State support of
integration of higher education and fundamental science on 1997 - 2000 ". A stage of
1998
T.V. Marinina
12 Educational scientific centres as integrating structures
V.N. Ochkin
16 Physics educational scientific centre "Fundamental optics and
spectroscopy". Development of an infrastructure and basic results of activity in 1998
O.N. Krokhin, V.N. Ochkin, I.N. Zavestovskaya
40 Section "Quantum devices and nanotechnologies" of Physics educational
scientific centre "Fundamental optics and spectroscopy"
Yu.V. Kopaev
53 Student's laboratory practical work in system of Physics educational scientific
centre "Fundamental optics and spectroscopy"
O.A. Akzypetrov
63 16-th ICONO - International Conference on Coherent and Nonlinear Optics.and Summer
School - short rates of young scientists
K.N. Drabovich
67 Spatial
rotation of two beams of light in Kerr's environment
A.S. Desyatnikov
85 New
approaches to creation of ohmic contacts for heterostructures with quantum wells
S.V. Yevstigneev, D.S. Shipitsin
91 Mechanisms
of emitting recombination in InGaN/AlGaN/GaN heterojunctions with quantum wells
A.N.Turkin
98 Diffusing-wave
spectroscopy in media with spatially heterogeneous scatterer dynamics
S.E. Skipetrov
110 Investigations
of dissipative processes in the electromagnetic fields in the HTSC composites
A.E. Khodot, A.V. Eremin
126 Generation
of stable ultrashort pulses by lasers controlled by solid-state optoelectronic negative
feedback
D.B.Vorchik, Yu.V.Shabalin
136 Memories Nikolay Ivanovich Koroteev
139 Advertising
Spatial
Rotation of Two Light Beams in Kerr's Environment
A.S. Desyatnikov
The Moscow Physical Engineering Institute
Effect of rotation theoretically is
investigated in process of distribution in Kerr's environment of optical beams. The
connected condition with formation of spatial structure similar spiral, can arise, when
the beams are directed uncomplanar. For a case of equal beams power the analytical
decision of the equations of a variational task is found. The numerical decision of the
equations for radiuses of beams, distance between their centres and corner of rotation has
shown, that if the capacities of beams are less than critical capacity self-focusing, it
is possible to choose parameters of beams, when diffraction дифракционное
dispersion is slower process in comparison with formation of a spiral. The area of
capacities of beams is determined in which the reception of several complete revolutions
of beams on final distance is possible.
New
Approaches to Creation of Ohmic Contacts for Heterostructures with Quantum Wells
Yevstigneev S.V., Shipitsin D.S.
Moscow State Institute of Electronic Engineering (Technical University)
The new method of creation of selfforming local ohmic contacts to the
same type conductivity quantum wells and forming of nonalloyed contacts to a
heterojunction transistor structure is described.
Mechanisms
Radiative Recombination in Heterostructures on a basis InGaN/AlGaN/GaN with quantum holes A.N. Turkin
M.V. Lomonosov Moscow State University,
Physical faculty, faculty of optics and spetroscopy
119899, Moscow
E-mail: turkin@scon175.phys.msu.su
a_turkin@chat.ru
Spectra of electroluminosity of light-blue and green lightdiodes (LD) on a basis multy
layers heterostructures InxGa1-xN/AlyGa1-yN/GaN with thin (2 - 3 nm) active InxGa1-xN
layer are investigated in an interval of temperatures 100 - 300 K and in a wide range of
currents J = 0,01 - 20 mA.
Diffusing-Wave
Spectroscopy in Media with SpatiallyHeterogeneous Scatterer Dynamics
S.E. Skipetrov
Technique of diffusing-wave spectroscopy (DWS) is
proposed and theoretically justified for turbid media with spatially heterogeneous
scatterer dynamics. It is shown that DWS can be used for visualizing macroscopically
heterogeneous regions of the medium (e.g., for visualization of flows). Influence of
ponderomotive effects on correlation properties of multiply scattered light is studied as
well.
Investigations
of Dissipative Processes in the Electromagnetic Fields in the HTSC Composites
A.E. Khodot, A.V. Eremin
The Moscow State Physical Engineering Institute
( Technical university), Moscow, 115409, Kashirskoe highway, 31
E-mail: rudnev@supercon.mephi.ru
Results of AC transport losses
measurements are presented for 7, 19, 37, 61, 91, 127, 169, 703 - filamentary Bi-2223/Ag
tapes. The measurements have been carried out both in self-field conditions and at the
external magnetic field applied to the tape at the different angles and at different
temperatures. The dependencies of the AC losses on current amplitude and frequency have
been obtained. It is found that for all tapes the current amplitude dependencies of the AC
losses show good agreement with the Norris prediction for an elliptical or strip geometry.
It was found the increase of the external magnetic field results in increase of AC
transport losses is only through the change of the critical current. So the transport AC
losses in the tapes are the "saturation losses" that is differ than classic hysteresis
losses. Local measurements of hysteresis losses have shown that the values of the losses
in various points of investigated tapes are different more than 30%.
Generation
of Stable Ultra Short Pulses by Lasers with Solid-State an Electro Optics Negative
Feedback
D. B. Vorchik, Yu. V. Shabalin
The original electro optics circuits
are applied for management of generation of pulse lasers on YAlG:Nd3+ and
phosphat - Nd glass. The circuits are based on use of fast high-voltage silicon structures
(voltage 1- 10 kV, time of the response of a photocurrent ? ~ 0,5 ns). The steady mode of
self-synchronization of styles is achieved only at the expense of action moved on time
optoelectronic negative feedback. Two techniques of management are realized: on the basis
of elementary relaxator and with self-excitation of resonant electrical fluctuations of a
GHz range. At use of a sated absorber the mode of hybrid synchronization of styles with
the increased stability of generated pulses is received. For the laser on phosphat - Nd
glass the duration of a pulse has made < 0.8 ps.
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