Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Dey, T. N."'
Cloning of arbitrary images encoded onto the spatial profile of a laser beam onto that of a second beam is theoretically investigated. The two fields couple to an atomic lambda system in a coherent population trapping configuration. In particular, th
Externí odkaz:
http://arxiv.org/abs/1304.5888
Beam propagation beyond the paraxial approximation is studied in an optically written waveguide structure. The waveguide structure that leads to diffractionless light propagation, is imprinted on a medium consisting of a five-level atomic vapor drive
Externí odkaz:
http://arxiv.org/abs/1303.1376
Grey solitons, with complex envelope, are obtained as exact solutions of the coupled system describing doped optical nonlinear fibers. The phase degree of freedom plays a crucial role in removing the restrictive equal frequency conditions on the tanh
Externí odkaz:
http://arxiv.org/abs/1109.4556
Autor:
Dey, T. N., Evers, J.
Publikováno v:
Phys. Rev. A 84, 043842 (2011)
Diffractionless propagation of optical beams through atomic vapors is investigated. The atoms in the vapor are operated in a three-level Raman configuration. A suitably chosen control beam couples to one of the transitions, and thereby creates a spat
Externí odkaz:
http://arxiv.org/abs/1108.1875
Publikováno v:
Phys. Rev. A 82, 013815 (2010)
We analyze the influence of dipole-dipole interactions in an electromagnetically induced transparency setup at high density. We show both analytically and numerically that the polarization contribution to the local field strongly modulates the phase
Externí odkaz:
http://arxiv.org/abs/0902.0752
Publikováno v:
Phys. Rev. A 74, 043805 (2006) (4 pages)
We present a theoretical formulation of competition among electromagnetically induced transparency (EIT) and Raman processes. The latter become important when the medium can no longer be considered to be dilute. Unlike the standard formulation of EIT
Externí odkaz:
http://arxiv.org/abs/physics/0605231
Autor:
Agarwal, G. S., Dey, T. N.
Publikováno v:
Physical Review A 73, 043809 (2006)
We calculate the characteristics of ultraslow light in an inhomogeneously broadened medium. We present analytical and numerical results for the group delay as a function of power of the propagating pulse. We apply these results to explain the recentl
Externí odkaz:
http://arxiv.org/abs/physics/0511002
Autor:
Agarwal, G. S., Dey, T. N.
Publikováno v:
Phys. Rev. Lett. 92, 203901 (2004)
We develop models for the propagation of intense pulses in solid state media which can have either saturated absorption or exhibit reverse absorption . We show that the experiments of Bigelow {\it et al.}[Phys. Rev. Lett. {\bf 90}, 113903 (2003); Sci
Externí odkaz:
http://arxiv.org/abs/quant-ph/0307224
Publikováno v:
Journal of Applied Physics; 10/15/1995, Vol. 78 Issue 8, p5155, 11p, 4 Diagrams, 5 Charts, 7 Graphs
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