Terahertz polarizer with high extinction ratios below -60 dB, transmission power above 90%, robustness, and a low-cost structure.

2016 Fiscal Year Final Research Report

• Project/Area Number: 26600108
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Optical engineering, Photon science
• Research Institution: Ibaraki University
• Principal Investigator: SUZUKI TAKEHITO 茨城大学, 工学部, 講師 (60550506)
• Research Collaborator: Kishi Yudai 茨城大学, 理工学研究科
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: テラヘルツ波帯 / 偏光子 / 金属スリット構造 / メタマテリアル / モードマッチング法 / 散乱行列

Outline of Final Research Achievements

Measurements utilizing terahertz waves have found and observed novel physical phenomena. High-sensitivity terahertz polarizers are demanded for accurate-polarization measurements. However, conventional wire-grid polarizers cannot simultaneously realize a high extinction ratio, high transmission power, and robustness. We demonstrate a laminated-structure polarizer with a high extinction ratio, high transmission power, and robustness. The design is performed by a mode-matching method for an iterative design, taking into fabrication conditions. Measurements by terahertz time-domain spectroscopy (THz-TDS) confirm the performance of fabricate polarizers.

Free Research Field

応用物理学・工学