Scholarlink

<p>We propose an all-dielectric magnetic reflector in the terahertz (THz) band. The element structure of all-dielectric gratings is designed by finite integral method. The element structure is optimized using the parameter sweep method, and the reflection amplitude and the reflection phase of each cell structure have been optimized. Eight grating element structures with a phase interval of 45°and an overall phase covering 2π tuning range were optimized and designed at 0.27-THz center frequency. Their reflection coefficients are all above 0.6. By arranging the eight optimized elements, a device that can generate the deflection of the reflected beam with a deflection angle of 16° was constructed. Far-field scattering was obtained, and a reflecting lens was constructed on the basis of these eight grating elements. We further optimized the phase distribution of the cell structure, and arranged these cell structures with a more refined phase in order to construct a reflective focusing lens. Based on the generalized Snell’s law, we have calculated the deflection angle of the reflected beam and found that the theoretical calculation results are basically consistent with the numerical simulation results.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Design and Analysis of Terahertz Wave All-Dielectric Grating Magnetic Reflector

  • 期刊论文

  • 发表日期：

    2025年2月22日

查看全文
  • Yijie Tong,
  • Xudong Qiu,
  • Bin Lou,
  • Yanling Li,
  • Zhouhong Zhu,
  • Ying Tian,
  • Hai Lin,
  • Fuhai Liu

摘要

We propose an all-dielectric magnetic reflector in the terahertz (THz) band. The element structure of all-dielectric gratings is designed by finite integral method. The element structure is optimized using the parameter sweep method, and the reflection amplitude and the reflection phase of each cell structure have been optimized. Eight grating element structures with a phase interval of 45°and an overall phase covering 2π tuning range were optimized and designed at 0.27-THz center frequency. Their reflection coefficients are all above 0.6. By arranging the eight optimized elements, a device that can generate the deflection of the reflected beam with a deflection angle of 16° was constructed. Far-field scattering was obtained, and a reflecting lens was constructed on the basis of these eight grating elements. We further optimized the phase distribution of the cell structure, and arranged these cell structures with a more refined phase in order to construct a reflective focusing lens. Based on the generalized Snell’s law, we have calculated the deflection angle of the reflected beam and found that the theoretical calculation results are basically consistent with the numerical simulation results.