Courtial, J., Robertson, D.A., Dholakia, K., Allen, L., and Padgett, M.J. (1998) Rotational frequency shift of a light beam. Physical Review Letters, 81(22), pp. 4828-4830. (doi:10.1103/PhysRevLett.81.4828)
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We explain the rotational frequency shift of a light beam in classical terms and measure it using a mm-wave source. The shift is equal to the total angular momentum per photon multiplied by the angular velocity between the source and observer. This is analogous to the translational Doppler shift, which is equal to the momentum per photon multiplied by the translational velocity. We show that the shifts due to the spin and orbital angular momentum components of the light beam act in an additive way. [S0031-9007(98)07769-2].
|Glasgow Author(s) Enlighten ID:||Allen, Prof Leslie and Courtial, Dr Johannes and Padgett, Professor Miles|
|Authors:||Courtial, J., Robertson, D.A., Dholakia, K., Allen, L., and Padgett, M.J.|
|College/School:||College of Science and Engineering > School of Physics and Astronomy|
|Journal Name:||Physical Review Letters|
|Journal Abbr.:||Phys. Rev. Lett.|
|Publisher:||American Physical Society|