Description of van der Waals interactions using transformation optics

Exact calculation of the van der Waals interaction between closely spaced plasmonic nanoparticles is challenging due to the strong concentration of the electromagnetic fields that takes place at the nanometric gap between them. The technique of transformation optics, capable of mapping a small volum...

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Bibliographic Details
Published in:	Physical review letters Vol. 111; no. 3; p. 033602
Main Authors:	Zhao, Rongkuo, Luo, Yu, Fernández-Domínguez, A I, Pendry, J B
Format:	Journal Article
Language:	English
Published:	United States 19-07-2013
Subjects:	Electromagnetic Phenomena Metal Nanoparticles - chemistry Models, Theoretical Optics and Photonics Silver - chemistry Surface Plasmon Resonance
Online Access:	Get full text
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Summary:	Exact calculation of the van der Waals interaction between closely spaced plasmonic nanoparticles is challenging due to the strong concentration of the electromagnetic fields that takes place at the nanometric gap between them. The technique of transformation optics, capable of mapping a small volume into any desired length scale, enables us to shed physical insight into the intricate behavior of electromagnetic fields in extremely small gaps. Using this theoretical tool, we obtain universal analytical expressions for the van der Waals interactions between spherical nanoparticles made of realistic metals at arbitrary separation.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.111.033602