Spectroscopic observation of the rotational Doppler effect.
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 electromagnetically induced transparency coherence resonance on Rb vapor when the two incident Laguerre-Gaussian laser beams have opposite topological charges. The observations closely agree with theoretical predictions.
Barreiro
S
S
Facultad de Ingeniería, Instituto de Física, C. Postal 30, 11000 Montevideo, Uruguay.
Tabosa
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Failache
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Lezama
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