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Search Parameters:
Keywords = magnetophotonic crystals

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14 pages, 6346 KiB  
Article
Odd Magneto-Optical Linear Dichroism in a Magnetophotonic Crystal
by Tatiana V. Mikhailova, Daria O. Ignatyeva, Sergey D. Lyashko, Vladimir N. Berzhansky and Vladimir I. Belotelov
Photonics 2023, 10(11), 1237; https://doi.org/10.3390/photonics10111237 - 6 Nov 2023
Cited by 3 | Viewed by 1477
Abstract
The phenomena of magneto-optical polarization rotation and circular magnetic dichroism are well known in the Faraday configuration. We present another effect, an odd magneto-optical linear dichroism, arising in nanostructures with polarization-dependent mode Q-factors and magneto-optical components. It reveals itself as the magneto-optical [...] Read more.
The phenomena of magneto-optical polarization rotation and circular magnetic dichroism are well known in the Faraday configuration. We present another effect, an odd magneto-optical linear dichroism, arising in nanostructures with polarization-dependent mode Q-factors and magneto-optical components. It reveals itself as the magneto-optical modulation of light intensity for the two opposite magnetization directions in the Faraday configuration. The effect was demonstrated on a magnetophotonic crystal with a cavity mode, the polarization-dependent Q-factor of which is due to oblique incidence. For a polarization angle of 60° (or 120°) and an angle of incidence around 60°, the magneto-optical intensity modulation maximizes and reaches 6%. Full article
(This article belongs to the Section Optoelectronics and Optical Materials)
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12 pages, 1721 KiB  
Article
Magneto-Optical Faraday Effect in Quasicrystalline and Aperiodic Microresonator Structures
by Daria O. Ignatyeva, Polina V. Golovko and Vladimir I. Belotelov
Magnetochemistry 2023, 9(2), 54; https://doi.org/10.3390/magnetochemistry9020054 - 10 Feb 2023
Cited by 2 | Viewed by 2405
Abstract
We theoretically and numerically investigate magnetophotonic microresonators formed by a magnetic layer sandwiched between two reflective multilayers with different layer arrangements. Quasicrystals with the Fibonacci layer sequence and aperiodic structures with the Thue–Morse sequence are all compared to the conventional photonic crystal Bragg [...] Read more.
We theoretically and numerically investigate magnetophotonic microresonators formed by a magnetic layer sandwiched between two reflective multilayers with different layer arrangements. Quasicrystals with the Fibonacci layer sequence and aperiodic structures with the Thue–Morse sequence are all compared to the conventional photonic crystal Bragg microresonators. The magneto-optical spectral properties of such magnetophotonic structures are completely different from each other and from a uniform magnetic film. In multilayered structures of various order types, microresonator modes are excited. The feature of multilayered structures with arrangements different from a periodic one is that they support the excitation of the multiple microresonator modes in a limited visible and near-infrared spectral range. The wavelengths of the two microresonator modes in a regular photonic crystal differ by more than one octave. This feature of the quasi-crystalline and aperiodic microresonators is important for applications in devices based on the Faraday effect. Full article
(This article belongs to the Special Issue New Trends in Magneto-Optical Ceramics)
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10 pages, 2290 KiB  
Communication
Sensing of Surface and Bulk Refractive Index Using Magnetophotonic Crystal with Hybrid Magneto-Optical Response
by Daria Ignatyeva, Pavel Kapralov, Polina Golovko, Polina Shilina, Anastasiya Khramova, Sergey Sekatskii, Mohammad Nur-E-Alam, Kamal Alameh, Mikhail Vasiliev, Andrey Kalish and Vladimir Belotelov
Sensors 2021, 21(6), 1984; https://doi.org/10.3390/s21061984 - 11 Mar 2021
Cited by 10 | Viewed by 3417
Abstract
We propose an all-dielectric magneto-photonic crystal with a hybrid magneto-optical response that allows for the simultaneous measurements of the surface and bulk refractive index of the analyzed substance. The approach is based on two different spectral features of the magneto-optical response corresponding to [...] Read more.
We propose an all-dielectric magneto-photonic crystal with a hybrid magneto-optical response that allows for the simultaneous measurements of the surface and bulk refractive index of the analyzed substance. The approach is based on two different spectral features of the magneto-optical response corresponding to the resonances in p- and s-polarizations of the incident light. Angular spectra of p-polarized light have a step-like behavior near the total internal reflection angle which position is sensitive to the bulk refractive index. S-polarized light excites the TE-polarized optical Tamm surface mode localized in a submicron region near the photonic crystal surface and is sensitive to the refractive index of the near-surface analyte. We propose to measure a hybrid magneto-optical intensity modulation of p-polarized light obtained by switching the magnetic field between the transverse and polar configurations. The transversal component of the external magnetic field is responsible for the magneto-optical resonance near total internal reflection conditions, and the polar component reveals the resonance of the Tamm surface mode. Therefore, both surface- and bulk-associated features are present in the magneto-optical spectra of the p-polarized light. Full article
(This article belongs to the Special Issue Thin-Film Materials and Nanostructure Devices Applicable for Sensing)
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9 pages, 2621 KiB  
Article
Magneto-Optical Isolator Based on Ultra-Wideband Photonic Crystals Waveguide for 5G Communication System
by Yong Wang, Biaogang Xu, Dengguo Zhang, Shixiang Xu, Zheng Dong, Xuanke Zeng, Xiaowei Lu and Jihong Pei
Crystals 2019, 9(11), 570; https://doi.org/10.3390/cryst9110570 - 30 Oct 2019
Cited by 15 | Viewed by 3539
Abstract
This paper presents a novel magneto-optical isolator based on an ultra-wideband and high efficiency photonic crystals (PCs) waveguide and gyromagnetic ferrites. The three-dimensional numerical simulation finds that the photonic crystals waveguide’s (PCW) transmission efficiency rises with its height and width. The corresponding experiments [...] Read more.
This paper presents a novel magneto-optical isolator based on an ultra-wideband and high efficiency photonic crystals (PCs) waveguide and gyromagnetic ferrites. The three-dimensional numerical simulation finds that the photonic crystals waveguide’s (PCW) transmission efficiency rises with its height and width. The corresponding experiments are performed by using a triangular lattice Al2O3 dielectric posts array in 5G millimeter wave band. The measured transmission efficiency is up to 90.78% for the optimal PCs waveguide structure, which has ultra-wide operating bandwidth from 23.45 to 31.25 GHz. The magneto-optical isolator is designed by inserting two rectangular gyromagnetic ferrites into the PCs waveguide. Due to the contrast between the effective permeability of the left and right circular polarization waves passing through the magnetized ferrite sheets, the ferromagnetic resonance absorption of the forward and reverse waves is different. By using finite element method, the isolation is optimized to be 49.49 dB for the isolator and its relative bandwidth reaches 8.85%. The high isolation, broadband, and easy integration indicate that our designed magneto-optical isolator has significant advantage in 5G communication systems. Full article
(This article belongs to the Special Issue Sonic and Photonic Crystals)
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8 pages, 1395 KiB  
Article
Freeform Fabrication of Magnetophotonic Crystals with Diamond Lattices of Oxide and Metallic Glasses for Terahertz Wave Control by Micro Patterning Stereolithography and Low Temperature Sintering
by Soshu Kirihara and Maasa Nakano
Micromachines 2013, 4(2), 149-156; https://doi.org/10.3390/mi4020149 - 2 Apr 2013
Cited by 4 | Viewed by 7161
Abstract
Micrometer order magnetophotonic crystals with periodic arranged metallic glass and oxide glass composite materials were fabricated by stereolithographic method to reflect electromagnetic waves in terahertz frequency ranges through Bragg diffraction. In the fabrication process, the photo sensitive acrylic resin paste mixed with micrometer [...] Read more.
Micrometer order magnetophotonic crystals with periodic arranged metallic glass and oxide glass composite materials were fabricated by stereolithographic method to reflect electromagnetic waves in terahertz frequency ranges through Bragg diffraction. In the fabrication process, the photo sensitive acrylic resin paste mixed with micrometer sized metallic glass of Fe72B14.4Si9.6Nb4 and oxide glass of B2O3·Bi2O3 particles was spread on a metal substrate, and cross sectional images of ultra violet ray were exposed. Through the layer by layer stacking, micro lattice structures with a diamond type periodic arrangement were successfully formed. The composite structures could be obtained through the dewaxing and sintering process with the lower temperature under the transition point of metallic glass. Transmission spectra of the terahertz waves through the magnetophotonic crystals were measured by using a terahertz time domain spectroscopy. Full article
(This article belongs to the Special Issue Glass Micromachining and Applications of Glass)
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29 pages, 948 KiB  
Review
Formation of Degenerate Band Gaps in Layered Systems
by Anton I. Ignatov, Alexander M. Merzlikin, Miguel Levy and Alexey P. Vinogradov
Materials 2012, 5(6), 1055-1083; https://doi.org/10.3390/ma5061055 - 7 Jun 2012
Cited by 9 | Viewed by 7124
Abstract
In the review, peculiarities of spectra of one-dimensional photonic crystals made of anisotropic and/or magnetooptic materials are considered. The attention is focused on band gaps of a special type—the so called degenerate band gaps which are degenerate with respect to polarization. Mechanisms of [...] Read more.
In the review, peculiarities of spectra of one-dimensional photonic crystals made of anisotropic and/or magnetooptic materials are considered. The attention is focused on band gaps of a special type—the so called degenerate band gaps which are degenerate with respect to polarization. Mechanisms of formation and properties of these band gaps are analyzed. Peculiarities of spectra of photonic crystals that arise due to the linkage between band gaps are discussed. Particularly, it is shown that formation of a frozen mode is caused by linkage between Brillouin and degenerate band gaps. Also, existence of the optical Borrmann effect at the boundaries of degenerate band gaps and optical Tamm states at the frequencies of degenerate band gaps are analyzed. Full article
(This article belongs to the Special Issue Photonic Materials and Applications)
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