Alodjants, A. P.

Arakelian, S. M.

Chestnov, I. Yu.

English

Электронная библиотека БГУ

 24
High temperature BEC with photon-like atomic polaritons  
in the biconical waveguides 
A. P. Alodjants, I. Yu. Chestnov, S. M. Arakelian 
Physics and Applied Mathematics Department, Vladimir State University, Vladimir, 
Russia, e-mail: alodjants@vlsu.ru 
 
We study the problem of high-temperature Bose-Einstein condensation (BEC) of 
atom-light  polaritons in a waveguide cavity appearing due to the interaction of 
two-level atoms with (nonresonant) quantized opticalradiation in the strong-
coupling regime and in the presence of optical collisions with buffer gas particles. 
Specifically, we propose a special  biconical waveguide cavity, permitting  
localization and trapping of low-branch (LB) polaritons imposed by the variation 
of the waveguide radius in longitudinal direction. We have shown that the critical 
temperature of BEC occurring in the system can be high enough- a few hundred 
kelvins; it is connected with the photon-like character of LB polaritons and 
strongly depends on waveguide cavity parameters. In the case of a linear trapping 
potentialwe obtain an Airy-shaped  
polariton condensate wave function. 
 
Single and dual core vortices in polariton systems 
A. Yulin, D. Skryabin, A. Gorbach 
CFTC, Department of Physics, University of Lisbon, Lisbon, Portugal,  
e-mail: ayulin@cii.fc.ul.pt 
 
The formation and the dynamics of polariton vortices in semiconductor 
microcavities are considered. It is shown that, depending on the parameters, the 
vortices can have either single or dual cores. Possible experimental realisations of 
the vortices are also discussed. 
 
Generation of Bessel plasmons in a metal-dielectric structures 
S.N. Kurilkina, V.N. Belyi, N.S. Kazak 
Laboratory for Optical Diagnostics, B.I.Stepanov Institute of Physics of NAS 
Belarus, Minsk, Belarus, e-mail: s.kurilkina@ifanbel.bas-net.by 
 
Theory is developed of generation of Bessel plasmons (BPs) and their 
superposition in metal-dielectric structure. The possibility is shown of excitation 
of two types of BPs characterized by various profiles of longitudinal component 
of electric vector inside the metal film. The dependence is investigated of 
conditions of Bessel plasmons excitation on optical properties of structure 
components. The intensity distribution for Bessel Plasmon field is calculated. 
Bessel plasmon multi-tip on the base of a superposition of BPs is proposed for 
probing the surface simultaneously through several channels with nanoscale 
resolution. Experimental set-up is elaborated for its realization. 


High temperature BEC with photon-like atomic polaritons in the biconical waveguides

http://elib.bsu.by/bitstream/123456789/24868/1/FANS_2012_24.pdf

High temperature BEC with photon-like atomic polaritons in the biconical waveguides

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