6533b7d7fe1ef96bd1268e4d
RESEARCH PRODUCT
Experimental verification of position-dependent angular-momentum selection rules for absorption of twisted light by a bound electron
Carl E. CarlsonAndrei AfanasevMaria SolyanikJonas SchulzFerdinand Schmidt-kalerChristian Tomás SchmiegelowChristian Tomás Schmiegelowsubject
Angular momentumField (physics)Atomic Physics (physics.atom-ph)Ciencias FísicasGeneral Physics and AstronomyFOS: Physical sciencesOPTICAL ANGULAR MOMENTUM01 natural sciencesOPTICAL VORTICESPhysics - Atomic PhysicsRABI OSCILLATIONS010309 optics//purl.org/becyt/ford/1 [https]0103 physical sciences010306 general physicsION TRAPSÓpticaPhysicsQuantum Physics//purl.org/becyt/ford/1.3 [https]VortexBessel beamQUANTUM SELECTION RULESAtomic physicsMultipole expansionQuantum Physics (quant-ph)Optical vortexCIENCIAS NATURALES Y EXACTASLight fieldExcitationPhysics - OpticsOptics (physics.optics)description
We analyze the multipole excitation of atoms with twisted light, i.e., by a vortex light field that carries orbital angular momentum. A single trapped $^{40}$Ca$^+$ ion serves as a localized and positioned probe of the exciting field. We drive the $S_{1/2} \to D_{5/2}$ transition and observe the relative strengths of different transitions, depending on the ion's transversal position with respect to the center of the vortex light field. On the other hand, transition amplitudes are calculated for a twisted light field in form of a Bessel beam, a Bessel-Gauss and a Gauss-Laguerre mode. Analyzing experimental obtained transition amplitudes we find agreement with the theoretical predictions at a level of better than 3\%. Finally, we propose measurement schemes with two-ion crystals to enhance the sensing accuracy of vortex modes in future experiments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-02-01 |