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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Excitation of high orbital angular momentum Rydberg states with Laguerre-Gauss beams

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Author(s):
Rodrigues, J. D. [1] ; Marcassa, L. G. [2] ; Mendonca, J. T. [1]
Total Authors: 3
Affiliation:
[1] Univ Nova Lisboa, Inst Plasmas & Fusao Nucl, Inst Super Tecn, P-1049001 Lisbon - Portugal
[2] Univ Sao Paulo, Inst Fis Sao Carlos, Caixa Postal 369, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS; v. 49, n. 7 APR 14 2016.
Web of Science Citations: 13
Abstract

We consider the excitation of Rydberg states through photons carrying an intrinsic orbital angular momentum degree of freedom. Laguerre-Gauss modes, with a helical wave-front structure, correspond to such a set of laser beams, which carry l(0) units of orbital angular momentum in their propagation direction, with l(0) the winding number. We demonstrate that, in a proper geometry setting, this orbital angular momentum can be transferred to the internal degrees of freedom of the atoms, thus violating the standard dipole selection rules. Higher orbital angular momentum states become accessible through a single photon excitation process. We investigate how the spacial structure of the Laguerre-Gauss beam affects the radial coupling strength, assuming the simplest case of hydrogen-like wave functions. Finally we discuss a generalization of the angular momentum coupling, in order to include the effects of the fine and hyperfine splitting, in the context of the Wigner-Eckart theorem. (AU)

FAPESP's process: 13/02816-8 - Manipulation of atomic collisions in optical traps
Grantee:Luis Gustavo Marcassa
Support type: Research Projects - Thematic Grants