Browsing by Author "Lembessis, V. E."

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Atoms in axially shifted tightly focused counter-propagating beams: the role of the Gouy and curvature phases

Koksal, K.; Lembessis, V. E.; Yuan, J.; Babiker, M. (Optıcal Soc Amer, 2020)

We consider the interaction of atoms with two tightly focused and axially shifted counter-propagating optical beams. At sub-wavelength focusing, we find that the scattering force potential in the three-dimensional space ...
Chirality and helicity of linearly-polarised Laguerre-Gaussian beams of small beam waists

Koksal, K.; Babiker, M.; Lembessis, V. E.; Yuan, J. (Elsevıer, 2021)

The chirality and helicity of a linearly polarised Laguerre-Gaussian (LG) beam are examined. Such a type of light possesses a large longitudinal field amplitude when it is created with a sufficiently small beam waist and ...
Chirality-enabled optical dipole potential energy for two-level atoms

Lembessis, V. E.; Koksal, K.; Yuan, J.; Babiker, M. (Amer Physıcal Soc, 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 ...