Wisniewski-Barker, E., Gibson, G. , Franke-Arnold, S. , Boyd, R. W. and Padgett, M. J. (2014) Mechanical Faraday effect for orbital angular momentum-carrying beams. Optics Express, 22(10), pp. 11690-11697. (doi: 10.1364/OE.22.011690)
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Publisher's URL: http://dx.doi.org/10.1364/OE.22.011690
Abstract
When linearly polarised light is transmitted through a spinning window, the plane of polarisation is rotated. This rotation arises through a phase change that is applied to the circularly polarised states corresponding to the spin angular momentum (SAM). Here we show an analogous effect for the orbital angular momentum (OAM), where a differential phase between the positive and negative modes (±ℓ) is observed as a rotation of the transmitted image. For normal materials, this rotation is on the order of a micro radian, but by using a slow-light medium, we show a rotation of a few degrees. We also note that, within the bounds of our experimental parameters, this rotation angle does not exceed the scale of the spatial features in the beam profile.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Gibson, Dr Graham and Padgett, Professor Miles and Boyd, Professor Robert and Franke-Arnold, Professor Sonja |
| Authors: | Wisniewski-Barker, E., Gibson, G., Franke-Arnold, S., Boyd, R. W., and Padgett, M. J. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Optics Express |
| Publisher: | Optical Society of America |
| ISSN: | 1094-4087 |
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