Electrodynamical Light Trapping Using Whispering-Gallery Resonances in Hyperbolic Cavities

Physical Review X

Chihhui Wu²  Alessandro Salandrino²  Xingjie Ni²  Xiang Zhang¹ 

[1] Materials Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA

[2] Nanoscale Science and Engineering Center, 5130 Etcheverry Hall, University of California, Berkeley, California 94720-1740, USA

Others  :  974644
DOI  :  http://dx.doi.org/10.1103/PhysRevX.4.021015

实施日期：2013-10-06，发布日期：2014-04-22

【 摘 要 】

We theoretically study spherical cavities composed of hyperbolic metamaterials with indefinite permittivity tensors. Such cavities are capable of electrodynamically confining fields with deep subwavelength cavity sizes. The supported resonant modes are analogous to the whispering-gallery modes found in dielectric microcavities with much larger physical sizes. Because of the nature of electrodynamical confinement, these hyperbolic metamaterial cavities exhibit quality factors higher than predicted in the electrostatic limit. In addition, confining electromagnetic fields into the small cavities results in an extremely high photonic local density of states.

【 授权许可】

   
Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.Published by the American Physical Society