Magnetophotonic crystals based on yttrium-iron-garnet infiltrated opals: Magnetization-induced second-harmonic generation

Abstract

Three-dimensional magnetophotonic crystals (MPCs) based on artificial opals infiltrated by yttrium iron garnet (YIG) are fabricated and their structural, optical, and nonlinear optical properties are studied. The formation of the crystalline YIG inside the opal matrix is checked by x-ray analysis. Two templates are used for the infiltration by YIG: bare opals and those covered by a thin platinum film. Optical second-harmonic generation (SHG) technique is used to study the magnetization-induced nonlinear-optical properties of the composed MPCs. A high nonlinear magneto-optical Kerr effect in the SHG intensity is observed at the edge of the photonic band gap of the MPCs.

Self‐Assembled Photonic Structures

“…Beside applications regarding optically active media for light generation, as mentioned above, regions of reduced group velocity have also been employed to enhance the non linear response of composite opals. For example enhanced second harmonic generation was measured for silicon‐SiO2498 and YIG‐SiO2 composite opals 499. This enhanced SHG has been recently measured in polystyrene artificial opals, where the spheres were coated with a non linear molecule 500…”

“…Malouk and coworkers were the first to claim an enhanced LHE for dye sensitized solar cells containing TiO 2 inverse opals,503, 504 though the effects they observed where later claimed to originate at resonances localized at the sample surface 505. Recently,506 experimental evidence for enhanced LHE due to reduced group velocity at the pseudogap edge was presented in samples similar to those of reference 499. Other proposals to obtain enhanced LHE, though not based on reduced group velocity but rather on multiple scattering of light, were presented in the form of “photonic sponges”507 and hierarchically structured ZnO films 508.…”

Formation of three-dimensional arrays of magnetic clusters NiO, Co3O4, and NiCo2O4 by the matrix method

“…[24]. In order to prevent the interaction of the filler with the opal material, the surface of spherical particles of amorphous SiO 2 can be coated with buffer layers of nanocrystalline Pt [9] or GaN [25][26][27], which do not form silicates. In this study, we applied an alternative approach.…”

“…Sols have been used to fabricate, for example, nanocomposites based on semiconductors (Ge [4], II-VI compounds [5]), metals (Au [6], Ag [7]), and magnetic materials (Fe 3 O 4 [8], Bi : YIG [9]). At the same time, there is an efficient universal method of introducing materials into pores of the matrices, which includes the stages of capillary impregnation of pores with aqueous salt solutions, thermal decomposition of the salts to oxides, and synthesis of target materials in the pores by means of heterogeneous chemical reactions [10].…”

Interactions of Electromagnetic Waves With 3-D Opal-Based Magnetophotonic Crystals at Microwave Frequencies

“…However, photonics is just a part of the broad electromagnetic spectrum, and similar structures-electromagnetic bandgap materials, EMBGs-can be created for any frequency in the EM spectrum [3]. EMBGs have a potential for use in microwave communication up to the THz range, like linear or nonlinear elements, nonreciprocal devices, filters, waveguides, or surface wave absorbing substrates for miniature antennas [4]- [6]. Introduction of magnetic defects into the magnetic opal structure presents an extraordinary opportunity to prepare novel functional materials.…”