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

• 作 者: 马长链 黄永清 段晓峰 任晓敏
• 机 构: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Post
• 出 处: Chinese Optics Letters
• 发表日期: 2014年12期
• 关键词: steering grating numerically transmitted designing refractive Figure coordinates

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°.

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 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 °.