| 1. |
- Dimov, Stefan S., et al.
(författare)
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4M Network of Excellence, Progress Report 2006-2008
- 2008
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Ingår i: 4M 2008. - Dunbeath : Whittles Publishing. - 9781904445760 ; , s. xv-xxxi
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Konferensbidrag (refereegranskat)abstract
- This report follows on from last year's "Progress Report 2004-2006" and gives an update on the continuing activities, such as the 4M Network cross-divisional projects and annual conference, as well as a description of the new activities in its third and forth year, such as the first 4M Summer School and Book Series. Finally, as the end of the funded lifetime of the network approaches the steps being taken to set up a 4M Association, which aims to create the organizational infrastructure to support the 4M Knowledge Community established in the last five years, are described.
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| 2. |
- Emile, Olivier, et al.
(författare)
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Electromagnetically Induced Torque on a Large Ring in the Microwave Range
- 2014
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 112:5, s. 053902-
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Tidskriftsartikel (refereegranskat)abstract
- We report on the exchange of orbital angular momentum between an electromagnetic wave and a 30 cm diameter ring. Using a turnstile antenna in the GHz range, we induce a torque on a suspended copper strip of the order of 10(-8) N m. Rotations of a few degrees and accelerations up to 4 x 10(-4) degrees/s(2) are observed. A linear dependence of the acceleration as a function of the applied power is found. There are many applications in the detection of angular momentum in electromagnetics, in acoustics, and also in the magnetization of nanostructures.
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| 3. |
- Emile, Olivier, et al.
(författare)
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Mechanism of angular momentum transfer from microwaves to a copper ring
- 2016
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Ingår i: European Physical Journal D. - : Springer Science and Business Media LLC. - 1434-6060 .- 1434-6079. ; 70:8
-
Tidskriftsartikel (refereegranskat)abstract
- In the exchange of orbital angular momentum between an electromagnetic wave and a copper ring we examine the origin of the Angular Momentum. We then investigate the transfer mechanism between the microwave and the object, and compare it with other mechanisms. We evidence a transfer mechanism based on the reflection of the electromagnetic field on the copper ring. In particular, at a microscopic scale, we show that the electromagnetic field induces alternative electric currents in the ring, with a small drift. Although little, the resistivity of copper leads to a force that rotates the ring. The estimation of the torque, which is of the order of 10(-8) Nm, is in good agreement with the experimental measurements. We also show that the transfer of electromagnetic orbital angular momentum to objects could be a way to measure the orbital angular momentum carried by electromagnetic fields, and we discuss possible applications.
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