中国物理B ›› 2020, Vol. 29 ›› Issue (5): 54210-054210.doi: 10.1088/1674-1056/ab81fa

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Narrowband perfect terahertz absorber based on polar-dielectrics metasurface

Meng-Meng Zhao(赵萌萌), Shu-Fang Fu(付淑芳), Sheng Zhou(周胜), Yu-Ling Song(宋玉玲), Qiang Zhang(张强), Yong-Qi Yin(尹永琦), Yu-Tian Zhao(赵玉田), Hong Liang(梁红), Xuan-Zhang Wang(王选章)   

  1. 1 Key Laboratory for Photonic and Electronic Bandgap Materials(Ministry of Education), School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China;
    2 Department of Electrical Engineering, University of California, Riverside, California 92521, USA;
    3 School of Technology, Harbin Normal University, Harbin 150086, China
  • 收稿日期:2019-12-12 修回日期:2020-02-05 出版日期:2020-05-05 发布日期:2020-05-05
  • 通讯作者: Shu-Fang Fu, Sheng Zhou E-mail:shufangfu1975@163.com;zhousheng_wl@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11204056), Harbin Normal University Master's Innovation Project (Grant Nos. HSDSSCX2018-77 and HSDSSCX2018-79), Key Laboratory of Engineering Dielectrics and Its Application (Harbin University of Science and Technology), Ministry of Education, China (Grant No. KF20171110), and Natural Science Foundation of Heilongjiang Province, China (Grant No. LH2019A028).

Narrowband perfect terahertz absorber based on polar-dielectrics metasurface

Meng-Meng Zhao(赵萌萌)1, Shu-Fang Fu(付淑芳)1, Sheng Zhou(周胜)1,2, Yu-Ling Song(宋玉玲)1, Qiang Zhang(张强)1, Yong-Qi Yin(尹永琦)1, Yu-Tian Zhao(赵玉田)1, Hong Liang(梁红)3, Xuan-Zhang Wang(王选章)1   

  1. 1 Key Laboratory for Photonic and Electronic Bandgap Materials(Ministry of Education), School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China;
    2 Department of Electrical Engineering, University of California, Riverside, California 92521, USA;
    3 School of Technology, Harbin Normal University, Harbin 150086, China
  • Received:2019-12-12 Revised:2020-02-05 Online:2020-05-05 Published:2020-05-05
  • Contact: Shu-Fang Fu, Sheng Zhou E-mail:shufangfu1975@163.com;zhousheng_wl@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11204056), Harbin Normal University Master's Innovation Project (Grant Nos. HSDSSCX2018-77 and HSDSSCX2018-79), Key Laboratory of Engineering Dielectrics and Its Application (Harbin University of Science and Technology), Ministry of Education, China (Grant No. KF20171110), and Natural Science Foundation of Heilongjiang Province, China (Grant No. LH2019A028).

摘要: We theoretically propose a narrowband perfect absorber metasurface (PAMS) based on surface phonon polaritons in the terahertz range. The PAMS has unit cell consisting of a silver biarc on the top, a thin polar-dielectric in the middle and a silver layer at the bottom. The phonon polaritons are excited at the interface between the silver biarc and the polar dielectric, and enhance the absorption of the PAMS. The absorption peak is at 36.813 μm and the full width half maximum (FWHM) is nearly 36 nm, independent of the polarization and incidence angle. The electric fields are located at the split of the biarc silver layer and the quality factor Q is 1150. The FWHM decreases with the decreasing split width. When the thickness of the bottom layer is larger than 50 nm, the narrow band and high absorption are insensitive to the thickness of those layers. The designed absorber may have useful applications in terahertz spectra such as energy harvesting, thermal emitter, and sensing.

关键词: metasurface, narrowband perfect absorber, terahertz, polar-dielectrics

Abstract: We theoretically propose a narrowband perfect absorber metasurface (PAMS) based on surface phonon polaritons in the terahertz range. The PAMS has unit cell consisting of a silver biarc on the top, a thin polar-dielectric in the middle and a silver layer at the bottom. The phonon polaritons are excited at the interface between the silver biarc and the polar dielectric, and enhance the absorption of the PAMS. The absorption peak is at 36.813 μm and the full width half maximum (FWHM) is nearly 36 nm, independent of the polarization and incidence angle. The electric fields are located at the split of the biarc silver layer and the quality factor Q is 1150. The FWHM decreases with the decreasing split width. When the thickness of the bottom layer is larger than 50 nm, the narrow band and high absorption are insensitive to the thickness of those layers. The designed absorber may have useful applications in terahertz spectra such as energy harvesting, thermal emitter, and sensing.

Key words: metasurface, narrowband perfect absorber, terahertz, polar-dielectrics

中图分类号:  (Infrared and Raman spectra)

  • 78.30.-j
78.20.-e (Optical properties of bulk materials and thin films) 42.25.Ja (Polarization) 42.25.Bs (Wave propagation, transmission and absorption)