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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 12,
  • Issue 12,
  • pp. 120501-120501
  • (2014)

High-transmittivity non-periodic sub-wavelength high-contrast grating with large-angle beam-steering ability

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Abstract

We present a high-transmittivity non-periodic sub-wavelength high-contrast grating (HCG) with large-angle beam-steering ability for transmitted light. The phase front profile of transmitted light is a decisive factor to the beam-steering property of the HCG. By designing the structural parameters of the HCG, both beam steering and high transmittivity can be achieved. The properties of the beam steering and transmission are numerically studied with the finite element method. The results show that the transmittivity is up to 0.91 and the steering angle is 27.42° which is consistent with the theoretical 30°.

© 2014 Chinese Optics Letters

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