Analysis and design of concave lens with metallic slit array for terahertz wave band

Takehito Suzuki, Hiroki Yonamine, Takuya Konno, John C. Young, Kotaro Murai, Fumiaki Miyamaru, Keisuke Takano, Hideaki Kitahara, Masanori Hangyo

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


This paper presents a three-dimensional concave lens constructed from a metallic slit array. The effective refractive index is estimated to be 0<n<1 0 < n < 1. The actual lens requires spacers in the slits. A lens using a low loss dielectric material for the terahertz frequency band is designed. The fast wave effect is enhanced in order to mitigate the slow wave effect of the dielectric material. Full wave analysis results are obtained by ANSYS HFSS and the focusing effect of the three-dimensional concave lens is confirmed in the terahertz frequency band.

Original languageEnglish
Pages (from-to)495-500
Number of pages6
JournalApplied Physics A: Materials Science and Processing
Issue number2
StatePublished - May 2014

Bibliographical note

Funding Information:
The authors would like to thank Mr. Yudai Kishi, Mr. Yuki Takebayashi and Mr. Katsunari Irie for their kind support to complete this paper. This research was partially supported by a Grant-in-Aid for Scientific Research on Innovative Areas “Electromagnetic Metamaterial” (No. 23109505) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, the Strategic Information and Communications R&D Promotion Programme (SCOPE) (No. 122103011) from the Ministry of Internal Affairs and Communications, Accelerating Utilization of University IP Program (No. 439) from Japan Science and Technology Agency (JST), Program for Revitalization Promotion (No. 241FT0462) from Japan Science and Technology Agency (JST), the Takayanagi Memorial Foundation, the Yazaki Memorial Foundation for Science and Technology, the Iketani Science and Technology Foundation, and Futaba Electronics Memorial Foundation.

ASJC Scopus subject areas

  • Chemistry (all)
  • Materials Science (all)


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