THz Spiral Metamaterial for Active Polarization Modulation

2016 Fiscal Year Final Research Report

• Project/Area Number: 26706008
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Nano/Microsystems
• Research Institution: The University of Electro-Communications (2015-2016); The University of Tokyo (2014)
• Principal Investigator: Tetsuo Kan 電気通信大学, 情報理工学(系)研究科, 准教授 (30504815)
• Research Collaborator: KONISHI kuniaki ; KANDA Natsuki
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: メタマテリアル / テラヘルツ光 / 可変偏光フィルタ / MEMS

Outline of Final Research Achievements

I have developed an active polarization filter which is able to switch the polarization state of the transmission light between the right and left circularly polarizations in terahertz (THz) frequency region where the wavelength is several hundred micrometer. Utilization of the polarization light, which presents an aligned oscillating electric field, enables us to obtain detailed material information at spectroscopic measurement. Moreover, dynamic switching of the polarizations provides further precise measurement. There has however been no active filter to switch the polarization states in THz region. I developed a THz metamaterial device to switch polarization states of the THz wave dynamically. The metamaterial is composed of array of reconfigurable metal spirals, which are 150-μm in diameter using Micro electro mechanical systems (MEMS) technology.

Free Research Field

MEMS