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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 27 — Dec. 19, 2011
  • pp: 26463–26469

Broadband unidirectional generation of surface plasmon polaritons with dielectric–film–coated asymmetric single–slit

Jianjun Chen, Zhi Li, Ming Lei, Song Yue, Jinghua Xiao, and Qihuang Gong  »View Author Affiliations


Optics Express, Vol. 19, Issue 27, pp. 26463-26469 (2011)
http://dx.doi.org/10.1364/OE.19.026463


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Abstract

A dielectric–film–coated asymmetric single nanoslit is proposed to realize broadband unidirectional generation of surface plasmon polaritons (SPPs). Due to the tight field confinements by the dielectric film and the deep groove in the asymmetric single slit, the transmittance of the SPPs in the groove to the left side considerably decreases. This greatly suppresses the left–propagating SPP generation efficiency for a broad bandwidth. Meanwhile, the right–propagating SPP generation efficiency has a flat spectra range because of the low transmittance, too. So the unidirectional SPP generation with bandwidth of >100 nm around λ = 750 nm is experimentally achieved for the device lateral dimension of only 865 nm.

© 2011 OSA

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

History
Original Manuscript: October 19, 2011
Revised Manuscript: November 23, 2011
Manuscript Accepted: November 28, 2011
Published: December 12, 2011

Citation
Jianjun Chen, Zhi Li, Ming Lei, Song Yue, Jinghua Xiao, and Qihuang Gong, "Broadband unidirectional generation of surface plasmon polaritons with dielectric–film–coated asymmetric single–slit," Opt. Express 19, 26463-26469 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-27-26463


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