Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Lembessis, Vassilis. E."'
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
We determine how a system composed of two nonidentical two-level atoms with different resonance frequencies and different damping rates could work as a nano-antenna for controlled mode switching and light routing. We calculate the angular distributio
Externí odkaz:
http://arxiv.org/abs/1309.3924
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