UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2022-07-01 16:07

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Conference: Bucharest University Faculty of Physics 2019 Meeting


Section: Theoretical Physics and Applied Mathematics


Title:
Connecting Twisted Photons to Spherical Photons


Authors:
Alexandra SERBAN (1), Virgil BARAN (1)


Affiliation:
1) Faculty of Physics, University of Bucharest, Atomistilor 405, Magurele, Romania


E-mail
alexandra_serban1997@yahoo.com


Keywords:
twisted photons, spherical photons, helical beams


Abstract:
Starting from the classic electromagnetic field, the next essential step is represented by the quantization of the field. First, we consider the expansion in the plane waves basis. Then, we construct one-photon states with definite momentum and helicity. Further, we study the connection between spherical photons, having well-defined angular momentum and helicity, and twisted photons. We focus on a method devoted to describe the interaction between helical beams and some mesoscopic physical systems. We explore the selection rules and how states with different angular momenta can be excited in this case.


References:

1. A. Afanasev et al., Atomic spectroscopy with twisted photons: separation of M1-E2 mixed multipoles, Phys. Rev. A 97, 023422 (2018).

2. A. Afanasev et al., High-multipole excitations of hydrogen-like atoms by twisted photons near a phase singularity, J. Opt. 18, 074013 (2016).