Rotational frequency shiftof a light beam

D. Courtial; D. A. Robertson; K. Dholakia; L. Allen; M. J. Padgett

doi:10.1103/PhysRevLett.81.4828

Rotational frequency shiftof a light beam

D. Courtial, D. A. Robertson, K. Dholakia, L. Allen, M. J. Padgett

Department of Physics

Research output: Contribution to journal › Article › peer-review

153 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	4828-4830
Number of pages	3
Journal	Physical review letters
Volume	81
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.81.4828
Publication status	Published - 1998 Nov 30

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.81.4828

Cite this

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abstract = "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.",

author = "D. Courtial and Robertson, {D. A.} and K. Dholakia and L. Allen and Padgett, {M. J.}",

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AU - Courtial, D.

AU - Robertson, D. A.

AU - Dholakia, K.

AU - Allen, L.

AU - Padgett, M. J.

PY - 1998/11/30

Y1 - 1998/11/30

N2 - 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.

AB - 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.

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Rotational frequency shiftof a light beam

Abstract

All Science Journal Classification (ASJC) codes

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