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Efficient nonlinear generation of high power, higher order, ultrafast “perfect” vortices in green

Apurv Chaitanya, N.; Jabir, M. V.; Samanta, Goutam Kumar (Cornell University Library, 2016-01)

We report on efficient nonlinear generation of ultrafast, higher order "perfect" vortices at the green wavelength. Based on Fourier transformation of the higher order Bessel-Gauss beam generated through the combination of ...
Finite temperature dynamics of vortices in Bose-Einstein condensates

Gautam, S.; Roy, Arko; Mukerjee, Subroto (Cornell University Library, 2013-10)

We study the dynamics of a single and a pair of vortices in quasi two-dimensional Bose-Einstein condensates at finite temperatures. We use the stochastic Gross-Pitaevskii equation, which is the Langevin equation for the ...
Generation of perfect vortex of variable size and its effect in angular spectrum of the down-converted photon

Jabir, M. V.; Apurv Chaitanya, N.; Aadhi, A.; Samanta, Goutam Kumar (Cornell University Library, 2016-01)

The perfect vortex is a new class of optical vortex beam having ring radius independent of its topological charge (order). One of the simplest techniques to generate such beams is the Fourier transformation of the Bessel-Gauss ...

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