Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Lembessis, Vassilis"'
The availability of coherent sources of higher order Poincare optical beams have opened up new opportunities for applications such as in the optical trapping of atoms and small particles, the manipulation of chirally-sensitive systems and in improved
Externí odkaz:
http://arxiv.org/abs/2407.00652
We demonstrate that higher order Poincare modes of order m are super-chiral, displaying enhancement factors proportional to $m$ and $m^2$ in their helicity/chirality. With m having arbitrarily large integer values, such modes, in principle, possess u
Externí odkaz:
http://arxiv.org/abs/2301.05204
We show that, in general, any type of radially-polarised paraxial twisted optical mode carries only an axial total optical angular momentum (AM) ${\bar {\cal J}_z}=\ell{\cal L}_0$ where $\ell$ is the winding number and ${\cal L}_0$ is a constant. Thi
Externí odkaz:
http://arxiv.org/abs/2212.03339
Publikováno v:
Phys. Rev. A 103, 013106 (2021)
We consider the optical dipole potential energy, which arises from the interaction of a two-level atom with a circularly polarized Laguerre-Gaussian laser beam of small waist. The beam is characterized by the existence of a longitudinal electric fiel
Externí odkaz:
http://arxiv.org/abs/2012.09465
The chirality and helicity of linearly polarised Laguerre-Gaussian (LG) beams are examined. Such a type of light possesses a substantial longitudinal field when its beam waist is sufficiently small and so gives rise to non-zero chirality and helicity
Externí odkaz:
http://arxiv.org/abs/2010.06338
Publikováno v:
In Results in Physics March 2023 46
The classical dynamics of a cold atom trapped inside a vertical rotating helical optical tube (HOT) is investigated by taking also into account the gravitational field. The resulting equations of motion are solved numerically. The rotation induces a
Externí odkaz:
http://arxiv.org/abs/1610.03394
Autor:
Łącki, Mateusz, Pichler, Hannes, Sterdyniak, Antoine, Lyras, Andreas, Lembessis, Vassilis E., Al-Dossary, Omar, Budich, Jan Carl, Zoller, Peter
Publikováno v:
Phys. Rev. A 93, 013604 (2016)
We propose and study various realizations of a Hofstadter-Hubbard model on a cylinder geometry with fermionic cold atoms in optical lattices. The cylindrical optical lattice is created by copropagating Laguerre-Gauss beams, i.e.~light beams carrying
Externí odkaz:
http://arxiv.org/abs/1507.00030
Autor:
Lembessis, Vassilis E., Lyras, Andreas, Rsheed, Anwar Al, Aldossary, Omar M., Ficek, Zbigniew
Publikováno v:
Phys. Rev. A 92, 023850 (2015)
We study the directional properties of a radiation field emitted by a geometrically small system composed of two identical two-level emitters located at short distances and driven by an optical vortex beam, a Laguerre-Gaussian beam which possesses a
Externí odkaz:
http://arxiv.org/abs/1506.07318