Magneto-plasmonics on perpendicular magnetic nanostructures for chemical and biological sensing applications

2016 Fiscal Year Final Research Report

• Project/Area Number: 26390091
• 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: Akita Industrial Technology Center
• Principal Investigator: Yamane Haruki 秋田県産業技術センター, 電子光応用開発部, 上席研究員 (80370237)
• Research Collaborator: Kobayashi Masanobu ; Takeda Keisuke
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 磁気光学 / 磁性プラズモニクス / バイオ化学センサ / プラズモン / 垂直磁気 / 磁性ナノ構造

Outline of Final Research Achievements

Magneto-optical (MO) properties of perpendicular magnetic nanostructures were investigated for chemical and biological sensing applications under polar Kerr measurement conditions. Magnetic stacked films with a MO cavity effect indicated a giant Kerr rotation angle of approximately 20 degrees. The films were desirable in chemical sensing applications because the MO cavity was sensitive to the optical conditions of the film surface. The films with Pd surface layer displayed a distinct MO response to hydrogen gas at ambient temperature in real time. Moreover, the magnetic nanostructures with noble metal fine grains exhibited a polarization reversal on Kerr rotation. The Kerr loop of the nanostructures depended on the external environment also. These MO behaviors on the nanostructures are attributed to the influence of localized surface plasmon polaritons excited at the noble metal fine grains.

Free Research Field

光磁気物性