Large Spectral Modification of the Faraday Effect of 3D SiO<SUB>2</SUB>/CoFe<SUB>2</SUB>O<SUB>4</SUB> Magneto-Photonic Crystals

Enhancement of Both Faraday and Kerr Effects with an All-Dielectric Grating Based on a Magneto-Optical Nanocomposite Material

“…The magneto-optical behavior of the device was investigated at room temperature using a homemade polarimetric optical bench, based on a modulation technic combined with an ellipsometric-type calibration method (see ref for details). This system mainly employs a xenon white light source (combined with a monochromator to select the wavelength with a spectral resolution of about 7 nm), a polarizer, a photoelastic modulator, an analyzer, a detector, and a lock-in amplifier.…”

“…Apart from plasmonic effects, resonant effects based only on dielectric materials are also attractive because of their reduced intrinsic absorption, which has an impact on the quality of resonance. Thereby, resonant enhancements of the MO effects have been obtained through the sub-micrometric periodic patterning of dielectric MO materials either as 1D/2D planar structure, as photonic crystals , or periodic waveguide devices . MO materials can also be periodically arranged as 1D or 2D gratings with a low- or high-index material to obtain MO enhancement through waveguide-mode resonant or electromagnetically induced transparency .…”

“…This work addresses these different challenges with the objective of realizing an all-dielectric 1D planar device able to enhance both the Faraday and Kerr effects at 1.5 μm. As a MO material, a nanocomposite made of CoFe 2 O 4 nanoparticles (NPs) embedded in a silica matrix is employed because of its proven ability to be integrated on photonic platforms, or processed as three-dimensional (3D) photonic crystals . The objective was to associate this composite with silicon nitride as a high-refractive-index material and form a 1D photonic-crystal membrane .…”

Photocrosslinking and photopatterning of magneto-optical nanocomposite sol–gel thin film under deep-UV irradiation

“…The Faraday spectra were acquired in the wavelength range 600-1700 nm with a homemade polarimetric optical bench based on the modulation technique combined with an ellipsometric-type calibration method (see 48 for details). The sample (nanocomposite film or ferrofluid cell) is placed perpendicular to the incident beam in the air gap of an electromagnet.…”

К Магнитооптике Холестерических Жидких Кристаллов

“…Кроме плазменных эффектов, резонансные эффекты, основанные только на диэлектрических материалах, также представляют большой интерес из-за их низкого собственного поглощения, которое влияет на качество резонанса. Резонансное усиление магнитооптических эффектов было получено за счет субмикрометрического периодического структурирования диэлектрических магнитооптических материалов либо в виде 1D/2D плоской структуры, либо в виде фотонных кристаллов или периодических волноводных устройств [9][10][11][12]. Вовторых, оксиды иттрия-граната, которые являются наиболее эффективными магнитооптическими материалами, очень сложно обрабатывать и формировать на фотонных платформах из-за несоответствия их решетки с фотонными подложками и высокотемпературного отжига, необходимого для достижения магнитооптической активности [13].…”