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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 14 — Jul. 15, 2014
  • pp: 4120–4123

Ultralong photonic nanojet formed by a two-layer dielectric microsphere

Yuecheng Shen, Lihong V. Wang, and Jung-Tsung Shen  »View Author Affiliations


Optics Letters, Vol. 39, Issue 14, pp. 4120-4123 (2014)
http://dx.doi.org/10.1364/OL.39.004120


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Abstract

A photonic nanojet is a highly focused optical beam with a subwavelength waist on the shadow side of the sphere. Successful far-field applications require long nanojets that extend afar. Using the exact Mie theory, we show that ultralong nanojets can be generated using a simple two-layer microsphere structure, using conventional optical materials that are readily available. In particular, we show that for a glass-based two-layer microsphere, the nanojet has an extension of 22 wavelengths. We also show that long nanojets can be formed using semiconductors at infrared frequencies in free space.

© 2014 Optical Society of America

OCIS Codes
(230.3990) Optical devices : Micro-optical devices
(350.3950) Other areas of optics : Micro-optics
(310.4165) Thin films : Multilayer design

ToC Category:
Thin Films

History
Original Manuscript: May 15, 2014
Manuscript Accepted: June 4, 2014
Published: July 7, 2014

Citation
Yuecheng Shen, Lihong V. Wang, and Jung-Tsung Shen, "Ultralong photonic nanojet formed by a two-layer dielectric microsphere," Opt. Lett. 39, 4120-4123 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-14-4120

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