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 , volumetric magnetic holograms , and labyrinthian magnetic domain structures , and can affect spin waves in magnonic crystals .
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  and three-dimensional MO holographic displays  with magnetophotonic crystals; high-speed MO Q-switch micro-chip lasers with iron-garnet films with labyrinthian magnetic domain structures ; and highly sensitive magnetic sensors and spinwave logic circuits with magnonic crystals .
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.
 T. Goto et al., “Magnetophotonic crystal comprising electro-optical layer for controlling helicity of light,” J. Appl. Phys., 111
, 07A913, 2012.
 Y. Nakamura et al., “Error-free reconstruction of magnetic hologram via improvement of recording conditions in collinear optical system,” Optics Exp., 25
, 15349-15357, 2017.
 R. Morimoto et al., “Magnetic domains driving a Q-switched laser,” Sci. Rep., 6
, 38679, 2016.
 N. Kanazawa et al., “Metal thickness dependence on spin wave propagation in magnonic .crystal using yttrium iron garnet,” J. Appl. Phys., 117
, 17E510, 2015.
 K. Nakamura et al., “Improvement of diffraction efficiency of three-dimensional magnetooptic spatial light modulator with magnetophotonic crystal,” Appl. Phys. Lett., 108
, 02240, 2016.
 N. Kanazawa et al., “Demonstration of a robust magnonic spin wave interferometer,” Sci. Rep., 6
. 30268, 2016.