We observe the frequency shift, lΩ, imparted to a mm-wave beam with an orbital angular momentum of lħ per photon, when the beam is rotated at angular frequency Ω. We show that thisshift, and those found in a number of experiments on the rotation of circularly polarized beams, are special cases of the rotational frequency shift recently predicted by Bialynicki-Birula and Bialynicka-Birula. The measurement also explicitly confirms a theoretical prediction by Nienhuis. © 1998 The American Physical Society.
CITATION STYLE
Courtial, J., Dholakia, K., Robertson, D. A., Allen, L., & Padgett, M. J. (1998). Measurement of the rotational frequency shift imparted to a rotating light beam possessing orbital angular momentum. Physical Review Letters, 80(15), 3217–3219. https://doi.org/10.1103/PhysRevLett.80.3217
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