Magnetooptical properties of perforated metallic films

Metal-nanoparticle arrays on a magnetic garnet film for tunable plasmon-enhanced Faraday rotation

“…Following this strategy, in a setup appropriate for enhancing Faraday rotation, a magnetic garnet film was sandwiched between a perforated metallic film and a glass substrate in geometries demonstrating the phenomenon of extraordinary optical transmission [24][25][26][27][28][29]. In these geometries, the Faraday rotation maximum appears at a peak in the transmittance that typically reaches 30%-40%, while, at the same time, an up to 10-fold Faraday rotation enhancement in absolute value can be achieved, depending on the operating wavelength region [24][25][26].…”

“…Following this strategy, in a setup appropriate for enhancing Faraday rotation, a magnetic garnet film was sandwiched between a perforated metallic film and a glass substrate in geometries demonstrating the phenomenon of extraordinary optical transmission [24][25][26][27][28][29]. In these geometries, the Faraday rotation maximum appears at a peak in the transmittance that typically reaches 30%-40%, while, at the same time, an up to 10-fold Faraday rotation enhancement in absolute value can be achieved, depending on the operating wavelength region [24][25][26]. Using a trilayer structure, with a dielectric spacer between a Bi:YIG slab and a perforated metallic film, the transmittance was shown to reach 46% at the peak of the Faraday rotation angle, ϕ 2.58°, in the infrared [27], though recent attempts with a similar configuration in the visible spectrum reported 50% transmittance but the Faraday rotation angle, for a 100 nm thick Bi:YIG film, did not exceed 0.35° [28].…”

Hybrid structures of magnetic semiconductors and plasmonic crystals: a novel concept for magneto-optical devices [Invited]

“…In previous theoretical works we predicted that the magnetooptical Faraday effect can be resonantly increased in periodic structures consisting of metallic grating deposited on a smooth magnetic layer [16,51,52]. Such structures are referred to as plasmonic crystals, since they support the SPPs with properties similar to photons in photonic crystals.…”

Controlling light with novel static and dynamic magnetophotonic structures

“…However, recent attempts to take advantage of this effect at visible frequencies resulted in maximum figure of merit of only 0.24 for the same (100 nm) Bi:YIG film thickness [33]. Increasing the thickness of the Bi:YIG film enables the appearance of higher-order slab modes leading to increased Faraday angles and transmittance which translates to higher FOM [29]. However, this FOM enhancement relative to the bare garnet film is not as high as the other cases considered here.…”

“…In the Faraday configuration, a magnetically saturated film by an external static magnetic field, applied perpendicular to the surface, causes a rotation of the plane of polarization of normally incident light. In a setup appropriate for enhancing Faraday rotation, a magnetic garnet film was coated with a perforated metallic film in geometries demonstrating the phenomenon of extraordinary optical transmission [28][29][30][31][32][33]. In these geometries the Faraday rotation maximum appears at a peak in the transmittance, which typically reaches about 50%, achieving an up to 10-fold enhancement (compared to the Faraday rotation of the bare film) depending on the operation wavelength.…”