Phys. Rev. Lett. 80, 3217–3219 (1998)Measurement of the Rotational Frequency Shift Imparted to a Rotating Light Beam Possessing Orbital Angular MomentumReceived 1 December 1997; published in the issue dated 13 April 1998 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 this shift, 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 URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.3217
DOI:
10.1103/PhysRevLett.80.3217
PACS:
32.70.Jz, 42.79.Nv
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