[18a-WL2_201-1~10] 3.11 Nanoscale optical science and near-field optics

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[18a-WL2_201-9] Evaluation of MO-SPR Characteristics Using a Violet Light Source and FeSi/Ag

〇(B)Toshifumi Sumida¹, Yamane Haruki², Shimizu Hiromasa¹ (1.Tokyo Univ. of Agri. & Tech, 2.Akita Ind. Tech. Center)

Keywords:

SPR sensor,MO-SPR sensor

Compared with conventional Surface Plasmon Resonance (SPR) sensors, Magneto-Optical SPR (MO-SPR) sensors offer improved detection sensitivity and enhanced measurement stability. In MO-SPR sensors, red light sources with wavelengths of 630–780 nm have been predominantly used; however, shortening the light-source wavelength has been reported to improve spatial resolution, reduce nonspecific signals, and enhance detection sensitivity. In this study, we optimized the structure of an MO-SPR sensor composed of Ag and the ferromagnetic metal FeSi using a 405 nm light source through simulations, and report measurements of reflectance changes induced by the transverse magneto-optical Kerr effect.