Transfer of optical orbital angular momentum to a bound electron

Photons can carry angular momentum, not only due to their spin, but also due to their spatial structure. This extra twist has been used, for example, to drive circular motion of microscopic particles in optical tweezers as well as to create vortices in quantum gases. Here we excite an atomic transit...

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Detalles Bibliográficos
Autor principal:	Schmiegelow, Christian Tomás
Publicado:	2016
Materias:	angular momentum electron light optical property quantum mechanics vortex Article atom frequency laser magnetic field motion oscillation photon
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20411723_v7_n_p_Schmiegelow http://hdl.handle.net/20.500.12110/paper_20411723_v7_n_p_Schmiegelow
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_20411723_v7_n_p_Schmiegelow
record_format	dspace
spelling	paper:paper_20411723_v7_n_p_Schmiegelow2023-06-08T16:33:08Z Transfer of optical orbital angular momentum to a bound electron Schmiegelow, Christian Tomás angular momentum electron light optical property quantum mechanics vortex Article atom electron frequency laser light magnetic field motion oscillation photon Photons can carry angular momentum, not only due to their spin, but also due to their spatial structure. This extra twist has been used, for example, to drive circular motion of microscopic particles in optical tweezers as well as to create vortices in quantum gases. Here we excite an atomic transition with a vortex laser beam and demonstrate the transfer of optical orbital angular momentum to the valence electron of a single trapped ion. We observe strongly modified selection rules showing that an atom can absorb two quanta of angular momentum from a single photon: one from the spin and another from the spatial structure of the beam. Furthermore, we show that parasitic ac-Stark shifts from off-resonant transitions are suppressed in the dark centre of vortex beams. These results show how light's spatial structure can determine the characteristics of light-matter interaction and pave the way for its application and observation in other systems. © The Author(s) 2016. Fil:Schmiegelow, C.T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20411723_v7_n_p_Schmiegelow http://hdl.handle.net/20.500.12110/paper_20411723_v7_n_p_Schmiegelow
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	angular momentum electron light optical property quantum mechanics vortex Article atom electron frequency laser light magnetic field motion oscillation photon
spellingShingle	angular momentum electron light optical property quantum mechanics vortex Article atom electron frequency laser light magnetic field motion oscillation photon Schmiegelow, Christian Tomás Transfer of optical orbital angular momentum to a bound electron
topic_facet	angular momentum electron light optical property quantum mechanics vortex Article atom electron frequency laser light magnetic field motion oscillation photon
description	Photons can carry angular momentum, not only due to their spin, but also due to their spatial structure. This extra twist has been used, for example, to drive circular motion of microscopic particles in optical tweezers as well as to create vortices in quantum gases. Here we excite an atomic transition with a vortex laser beam and demonstrate the transfer of optical orbital angular momentum to the valence electron of a single trapped ion. We observe strongly modified selection rules showing that an atom can absorb two quanta of angular momentum from a single photon: one from the spin and another from the spatial structure of the beam. Furthermore, we show that parasitic ac-Stark shifts from off-resonant transitions are suppressed in the dark centre of vortex beams. These results show how light's spatial structure can determine the characteristics of light-matter interaction and pave the way for its application and observation in other systems. © The Author(s) 2016.
author	Schmiegelow, Christian Tomás
author_facet	Schmiegelow, Christian Tomás
author_sort	Schmiegelow, Christian Tomás
title	Transfer of optical orbital angular momentum to a bound electron
title_short	Transfer of optical orbital angular momentum to a bound electron
title_full	Transfer of optical orbital angular momentum to a bound electron
title_fullStr	Transfer of optical orbital angular momentum to a bound electron
title_full_unstemmed	Transfer of optical orbital angular momentum to a bound electron
title_sort	transfer of optical orbital angular momentum to a bound electron
publishDate	2016
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20411723_v7_n_p_Schmiegelow http://hdl.handle.net/20.500.12110/paper_20411723_v7_n_p_Schmiegelow
work_keys_str_mv	AT schmiegelowchristiantomas transferofopticalorbitalangularmomentumtoaboundelectron
_version_	1768546762734174208

Transfer of optical orbital angular momentum to a bound electron

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