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RESEARCH PRODUCT
Twisted-Light-Ion Interaction: The Role of Longitudinal Fields.
Ferdinand Schmidt-kalerChristian Tomás SchmiegelowGuillermo Federico Quinteirosubject
Physicsbusiness.industryCiencias FísicasParaxial approximationÓptica CuánticaGeneral Physics and AstronomyFOS: Physical sciences//purl.org/becyt/ford/1.3 [https]01 natural sciencesIon010309 opticsAstronomía//purl.org/becyt/ford/1 [https]OpticsLight propagationFísica Atomica0103 physical sciencesLight beamHaces Estructurados010306 general physicsbusinessCIENCIAS NATURALES Y EXACTASPhysics - OpticsOptics (physics.optics)description
The propagation of light beams is well described using the paraxial approximation, where field components along the propagation direction are usually neglected. For strongly inhomogeneous or shaped light fields, however, this approximation may fail, leading to intriguing variations of the light-matter interaction. This is the case of twisted light having opposite orbital and spin angular momenta. We compare experimental data for the excitation of a quadrupole transition in a single trapped $^{40}$Ca$^+$ ion by Schmiegelow et al, Nat.\ Comm.\ 7, 12998 (2016), with a complete model where longitudinal components of the electric field are taken into account. Our model matches the experimental data and excludes by 11 standard deviations the approximation of complete transverse field. This demonstrates the importance of all field components in the interaction of twisted light with matter.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-07-15 | Physical review letters |