Study on metal nanostructures for radiation cooling under solar irradiation condition

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K04708
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: OKAMOTO TAKAYUKI 国立研究開発法人理化学研究所, 石橋極微デバイス工学研究室, 専任研究員 (40185476)
• Research Collaborator: TAKATORI Kentaro
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: プラズモニクス / メタマテリアル / 表面励起子ポラリトン / 放射冷却 / シアニン色素 / 広帯域光吸収 / 太陽電池

Outline of Final Research Achievements

A thin silver film in which randomly perforated circular holes with 100 nm diameter exhibited wideband light absorption. It was found that this silver thin film with holes was able to replace the indium-tin-oxide transparent electrode in organic thin film solar cells. A bumpy metal-insulator-metal structure, which was fabricated with a colloidal lithography technique, exhibited ultra-wide-band light absorption. The absorption was larger than 50% in the ranging from 0.4 μm to 3.2 μm. It was found that an organic non-crystalline media, a J-aggregate cyanine dye, was able to support surface exciton polaritons (SEPs). Reflection dips observed in Kretschmann-Raether optical configuration were clear evidences of the excitation of SEPs on the cyanine dye surface.

Free Research Field

プラズモニクス