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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 8 — Apr. 12, 2010
  • pp: 7590–7595

Unidirectional transmission in non-symmetric gratings made of isotropic material

Wei-Min Ye, Xiao-Dong Yuan, Chu-Cai Guo, and Chun Zen  »View Author Affiliations


Optics Express, Vol. 18, Issue 8, pp. 7590-7595 (2010)
http://dx.doi.org/10.1364/OE.18.007590


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Abstract

We achieve a broadband unidirectional transmission or One-way diffraction grating by cascading two parallel gratings made of isotropic material with different periods. In order to significantly reduce the reciprocal transmission of the zero order, one of them is chosen to be a subwavelength grating and designed as a wideband reflector for the incident-wave. It is demonstrated that more than 65 percent of the incident-wave energy can be transmitted unidirectionally with less than 0.22 percent transmission in the opposite direction at normal incidence for TE polarization. And, the relative bandwidth of the unidirectional transmission is greater than 10 percent.

© 2010 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1970) Diffraction and gratings : Diffractive optics
(120.7000) Instrumentation, measurement, and metrology : Transmission

ToC Category:
Diffraction and Gratings

History
Original Manuscript: January 11, 2010
Revised Manuscript: March 2, 2010
Manuscript Accepted: March 26, 2010
Published: March 29, 2010

Citation
Wei-Min Ye, Xiao-Dong Yuan, Chu-Cai Guo, and Chun Zen, "Unidirectional transmission in non-symmetric gratings made of isotropic material," Opt. Express 18, 7590-7595 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-8-7590


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References

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