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Optical Forces and Manipulation of Momentum in Metamaterials and Plasmonics III

16:40 : Chirality: a helping hand to tailor optical forces between metasurfaces

Sophie Viaene (1),Vincent Ginis (1),Pieter Verhulst (1),Jan Danckaert (1),Philippe Tassin (2)

(1)Vrije Universiteit Brussel (Belgium) , (2)Chalmers University (Sweden)

Optical forces provide a high-precision tool to move and rearrange subwavelength objects such as nanospheres and nanowires. In this work, we investigate the optical forces that arise when chiral metamaterial sheets are illuminated by circularly polarized electromagnetic radiation. Using the Maxwell stress tensor, we calculate the momentum transfer for several designs of chiral sheets from full-wave numerical simulations. We discuss the effects of the geometrical degrees of freedom and of the different material implementations on the resulting optical forces.
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16:55 : Contribution of non-local effects to the Casimir forces

Yan Francescato, Vincenzo Giannini

Imperial College London (United Kingdom)

The Casimir force is one of the few manifestations of quantum behaviour at macroscopic scale, often described as the force acting between two plates due to vacuum fluctuations. While there have been great development in its theoretical understanding the strong effect of non-locality on the electromagnetic modes supported by the plates have been neglected. We show that because the contribution to the force from these modes is dominant considering non-locality is crucial for a qualitatively correct description.
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