Zobrazeno 1 - 10
of 356
pro vyhledávání: '"P, Lembessis"'
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 respond to the recent comment in Optics Communications by Kayn Forbes on our recent Optics Communications article and we maintain that, contrary to what Forbes claims, substantial superchirality exists as a property of the $m\geq 1$ higher order P
Externí odkaz:
http://arxiv.org/abs/2406.15413
Optical tweezers use light from a tightly focused laser beam to manipulate the motion of tiny particles. When the laser light is strongly focused, but still paraxial, its e/m field is characterized by a longitudinal component which is of magnitude co
Externí odkaz:
http://arxiv.org/abs/2311.03847
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
We investigate the quantized states of a two-level Rb atom which is trapped by the optical dipole potential when the atom interacts with a helical optical tube (HOT) light field. The analysis shows that the stationary states can be defined by a tripl
Externí odkaz:
http://arxiv.org/abs/2202.03042
Autor:
N. Alsaawi, V.E. Lembessis
Publikováno v:
Results in Physics, Vol 61, Iss , Pp 107695- (2024)
We propose a scheme for the generation of an ion vortex beam and we study the properties of its electromagnetic field on a plane transverse to its propagation direction. The ion vortex is created by the diffraction of an ionic beam by a light mask wi
Externí odkaz:
https://doaj.org/article/f1671165f4c44edcb8b021f513c0ff3a
Publikováno v:
Applied Sciences, Vol 14, Iss 16, p 7008 (2024)
It is well established that the interaction of light with matter generally imparts mechanical forces and associated torques. Where laser light is involved, such effects can be deployed for the microscale and nanoscale manipulation of matter, giving r
Externí odkaz:
https://doaj.org/article/b9ae8985b6b04accadb5434d8b7de23a
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