Related Experiment Video
Updated: Dec 23, 2025

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Magnetic field sensor based on magnetoplasmonic crystal
Victor K Belyaev1, Valeria V Rodionova2, Andrey A Grunin3
1Institute of Physics, Mathematics and Informational Technologies, Immanuel Kant Baltic Federal University, Kaliningrad, 236041, Russia. belyaev@lnmm.ru.
Abstract:
Here we report on designing a magnetic field sensor based on magnetoplasmonic crystal made of noble and ferromagnetic metals deposited on one-dimensional subwavelength grating. The experimental data demonstrate resonant transverse magneto-optical Kerr effect (TMOKE) at a narrow spectral region of 50 nm corresponding to the surface plasmon-polaritons excitation and maximum modulation of the reflected light intensity of 4.5% in a modulating magnetic field with the magnitude of 16 Oe. Dependences of TMOKE on external alternating current (AC) and direct current (DC) magnetic field demonstrate that it is a possibility to use the magnetoplasmonic crystal as a high-sensitive sensing probe. The achieved sensitivity to DC magnetic field is up to 10-6 Oe at local area of 1 mm2.
Related Concept Videos
Magnetic Field Due To A Thin Straight Wire
Magnetic Field Of A Current Loop
Magnetic Field due to Moving Charges
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Magnetic Field of a Solenoid
Consider a solenoid with 100 turns wrapped around a cylinder of...
Ferromagnetism
Other Unique Bacteria

