Chirality in Optical Trapping and Optical Binding

Photonics

David S. Bradshaw¹  Kayn A. Forbes¹  Jamie M. Leeder¹ 

[1] School of Chemistry, University of East Anglia, Norwich, NR4 7TJ, UK;

关键词: optical trap;    optical binding;    optical forces;    chirality;    nanophotonics;    transition dipoles;    electrodynamics;    biophysics;   

DOI  :  10.3390/photonics2020483

来源: mdpi

【 摘 要 】

Optical trapping is a well-established technique that is increasingly used on biological substances and nanostructures. Chirality, the property of objects that differ from their mirror image, is also of significance in such fields, and a subject of much current interest. This review offers insight into the intertwining of these topics with a focus on the latest theory. Optical trapping of nanoscale objects involves forward Rayleigh scattering of light involving transition dipole moments; usually these dipoles are assumed to be electric although, in chiral studies, magnetic dipoles must also be considered. It is shown that a system combining optical trapping and chirality could be used to separate enantiomers. Attention is also given to optical binding, which involves light induced interactions between trapped particles. Interesting effects also arise when binding is combined with chirality.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.