SeminarioProf. MITSUTERU INOUE - MARTEDÌ 6 NOVEMBRE 2018 ORE 14:30
SeminarioProf. MITSUTERU INOUE - MARTEDÌ 6 NOVEMBRE 2018 ORE 14:30
Magnetic Phase Interference in Artificial Magnetic Lattices:
Functions and Applications to Optical, High-Frequency, and Spin Wave
Devices
AULA: Querzoli, LENS
- Polo Scientifico Sesto
Abstract
The introduction of artificial magnetic structures into magnetic
materials can induce novel electromagnetic and spin-wave behavior.
Nano-
and submicrometer-scale artificial magnetic lattices (AMLs) can control
optical (electromagnetic) waves in magnetophotonic crystals [1],
volumetric magnetic holograms [2], and labyrinthian magnetic domain
structures [3], and can affect spin waves in magnonic crystals [4].
In this talk, the fundamental properties of such AMLs, mainly in
magnetic garnet films and alloy thin films, are discussed, followed by
demonstrations of their applications in optical and spin-wave
micro-devices driven by magnetic phase interference: volumetric
magneto-optic (MO) hologram memories [2] and three-dimensional MO
holographic displays [5] with magnetophotonic crystals; high-speed MO
Q-switch micro-chip lasers with iron-garnet films with labyrinthian
magnetic domain structures [3]; and highly sensitive magnetic sensors
and spinwave logic circuits with magnonic crystals [6].
Prospective future spin-wave devices with AMLs will be discussed in the
context of the new paradigm of magnonics (electron non-transport
electronics), where spin waves play an important role as the
information
carrier.
REfS.
[1] T. Goto et al., “Magnetophotonic crystal comprising
electro-optical
layer for controlling helicity of light,” J. Appl. Phys., vol. 111,
07A913, 2012.
[2] Y. Nakamura et al., “Error-free reconstruction of magnetic
hologram
via improvement of recording conditions in collinear optical system,”
Optics Exp., vol. 25, pp. 15349-15357, 2017.
[3] R. Morimoto et al., “Magnetic domains driving a Q-switched
laser,”
Sci. Rep., vol. 6, 38679, 2016.
[4] N. Kanazawa et al., “Metal thickness dependence on spin wave
propagation in magnonic crystal using yttrium iron garnet,” J. Appl.
Phys., vol. 117, 17E510, 2015.
[5] K. Nakamura et al., “Improvement of diffraction efficiency of
three-dimensional magnetooptic spatial light modulator with
magnetophotonic crystal,” Appl. Phys. Lett., vol. 108, 02240, 2016.
[6] N. Kanazawa et al., “Demonstration of a robust magnonic spin wave
interferometer,” Sci. Rep., vol. 6. 30268, 2016.