Spectroscopic observation of the rotational Doppler effect
arXiv:quant-ph/0607184 · doi:10.1103/PhysRevLett.97.113601
Abstract
We report on the first spectroscopic observation of the rotational Doppler shift associated with light beams carrying orbital angular momentum. The effect is evidenced as the broadening of a Hanle/EIT coherence resonance on Rb vapor when the two incident Laguerre-Gaussian laser beams have opposite topological charges. The observations closely agree with theoretical predictions.
Submited to Physical Review Letter