MDPI - Publisher of Open Access Journals

14 pages, 6346 KiB

Open AccessArticle

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)

► Show Figures

Figure 1

12 pages, 1721 KiB

Open AccessArticle

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)

► Show Figures

Figure 1

17 pages, 16265 KiB

Open AccessFeature PaperReview

Magneto-Optics Effects: New Trends and Future Prospects for Technological Developments

by Conrad Rizal, Hiromasa Shimizu and Jorge Ricardo Mejía-Salazar

Magnetochemistry 2022, 8(9), 94; https://doi.org/10.3390/magnetochemistry8090094 - 24 Aug 2022

Cited by 29 | Viewed by 8310

Abstract

Magneto-optics (MO) is an effervescent research field, with a wide range of potential industrial applications including sensing, theranostics, pharmaceutics, magnetometry, and spectroscopy, among others. This review discusses the historical development, from the discovery of MO effects up to the most recent application trends. [...] Read more.

Magneto-optics (MO) is an effervescent research field, with a wide range of potential industrial applications including sensing, theranostics, pharmaceutics, magnetometry, and spectroscopy, among others. This review discusses the historical development, from the discovery of MO effects up to the most recent application trends. In addition to the consolidated fields of magnetoplasmonic sensing and modulation of optical signals, we describe novel MO materials, phenomena, and applications. We also identified the emerging field of all-dielectric magnetophotonics, which hold promise to overcome dissipation from metallic inclusions in plasmonic nanostructures. Moreover, we identified some challenges, such as the need to merge magneto-chiroptical effects with microfluidics technology, for chiral sensing and enantioseparation of drugs in the pharmaceutical industry. Other potential industrial applications are discussed in light of recent research achievements in the available literature. Full article

(This article belongs to the Special Issue Advanced Plasmonics and Magneto-Optical Technologies)

► Show Figures

Graphical abstract

10 pages, 2290 KiB

Open AccessCommunication

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)

► Show Figures

Figure 1

9 pages, 2621 KiB

Open AccessArticle

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)

► Show Figures

Figure 1

12 pages, 1866 KiB

Open AccessArticle

Influence of Substrate Stage Temperature and Rotation Rate on the Magneto-Optical Quality of RF-Sputtered Bi_2.1Dy_0.9Fe_3.9Ga_1.1O₁₂ Garnet Thin Films

by M. Nur-E-Alam, Mikhail Vasiliev and Kamal Alameh

Appl. Sci. 2018, 8(3), 456; https://doi.org/10.3390/app8030456 - 16 Mar 2018

Cited by 4 | Viewed by 4277

Abstract

Highly bismuth-substituted iron garnet thin films are prepared on quartz substrates by using a radio frequency (RF) magnetron sputtering technique. We study the factors (process parameters associated with the RF magnetron sputter deposition technique) affecting the magneto-optical (MO) properties of ferrite garnet films [...] Read more.

Highly bismuth-substituted iron garnet thin films are prepared on quartz substrates by using a radio frequency (RF) magnetron sputtering technique. We study the factors (process parameters associated with the RF magnetron sputter deposition technique) affecting the magneto-optical (MO) properties of ferrite garnet films of composition Bi_2.1Dy_0.9Fe_3.9Ga_1.1O₁₂. All films show high MO response across the visible range of wavelengths after being annealed. In particular, the effects of substrate stage temperature and rotation rate on the various properties of films are studied. Experimental results reveal that the characteristics of garnet films of this type can be tuned and optimized for use in various magnetic field-driven nanophotonics and integrated optics devices, and that, at a substrate stage rotation rate near 16 revolutions per minute, the MO quality of the developed MO films is the best, in comparison with films deposited at other rotation rates. To the best of our knowledge, this is the first report on the effects of deposition parameters on the properties of garnet films of this stoichiometry. Full article

(This article belongs to the Section Materials Science and Engineering)

► Show Figures

Figure 1

13 pages, 5361 KiB

Open AccessFeature PaperArticle

Direct Laser Writing of Magneto-Photonic Sub-Microstructures for Prospective Applications in Biomedical Engineering

by Thi Huong Au, Duc Thien Trinh, Quang Cong Tong, Danh Bich Do, Dang Phu Nguyen, Manh-Huong Phan and Ngoc Diep Lai

Nanomaterials 2017, 7(5), 105; https://doi.org/10.3390/nano7050105 - 9 May 2017

Cited by 21 | Viewed by 7203

Abstract

We report on the fabrication of desired magneto-photonic devices by a low one-photon absorption (LOPA) direct laser writing (DLW) technique on a photocurable nanocomposite consisting of magnetite (

{Fe}_{3}

O_{4}

) nanoparticles and a commercial SU-8 photoresist. The magnetic nanocomposite was [...] Read more.

We report on the fabrication of desired magneto-photonic devices by a low one-photon absorption (LOPA) direct laser writing (DLW) technique on a photocurable nanocomposite consisting of magnetite (

{Fe}_{3}

O_{4}

) nanoparticles and a commercial SU-8 photoresist. The magnetic nanocomposite was synthesized by mixing

{Fe}_{3}

O_{4}

nanoparticles with different kinds of SU-8 photoresists. We demonstrated that the degree of dispersion of

{Fe}_{3}

O_{4}

nanoparticles in the nanocomposite depended on the concentration of

{Fe}_{3}

O_{4}

nanoparticles, the viscosity of SU-8 resist, and the mixing time. By tuning these parameters, the most homogeneous magnetic nanocomposite was obtained with a concentration of about 2 wt % of

{Fe}_{3}

O_{4}

nanoparticles in SU-8 2005 photoresist for the mixing time of 20 days. The LOPA-based DLW technique was employed to fabricate on demand various magneto-photonic submicrometer structures, which are similar to those obtained without

{Fe}_{3}

O_{4}

nanoparticles. The magneto-photonic 2D and 3D structures with sizes as small as 150 nm were created. We demonstrated the strong magnetic field responses of the magneto-photonic nanostructures and their use as micro-actuators when immersed in a liquid solution. Full article

(This article belongs to the Special Issue Functional Magnetic Nanoparticles in Nanomedicine)

► Show Figures

Figure 1

12 pages, 1179 KiB

Open AccessArticle

Tunable Optical Nanocavity of Iron-garnet with a Buried Metal Layer

by Alexey N. Kuz'michev, Lars E. Kreilkamp, Mohammad Nur-E-Alam, Evgeni Bezus, Mikhail Vasiliev, Iliya A. Akimov, Kamal Alameh, Manfred Bayer and Vladimir I. Belotelov

Materials 2015, 8(6), 3012-3023; https://doi.org/10.3390/ma8063012 - 28 May 2015

Cited by 6 | Viewed by 5313

Abstract

We report on the fabrication and characterization of a novel magnetophotonic structure designed as iron garnet based magneto-optical nanoresonator cavity constrained by two noble metal mirrors. Since the iron garnet layer requires annealing at high temperatures, the fabrication process can be rather challenging. [...] Read more.

We report on the fabrication and characterization of a novel magnetophotonic structure designed as iron garnet based magneto-optical nanoresonator cavity constrained by two noble metal mirrors. Since the iron garnet layer requires annealing at high temperatures, the fabrication process can be rather challenging. Special approaches for the protection of metal layers against oxidation and morphological changes along with a special plasma-assisted polishing of the iron garnet layer surface were used to achieve a 10-fold enhancement of the Faraday rotation angle (up to 10.8\(^{\circ}/\mu\)m) within a special resonance peak of 12 nm (FWHM) linewidth at a wavelength of 772 nm, in the case of a resonator with two silver mirrors. These structures are promising for tunable nanophotonics applications, in particular, they can be used as magneto-optical (MO) metal-insulator-metal waveguides and modulators. Full article

(This article belongs to the Special Issue Plasmonic Materials)

► Show Figures

Figure 1

8 pages, 1395 KiB

Open AccessArticle

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 Fe₇₂B_14.4Si_9.6Nb₄ 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)

► Show Figures

Figure 1

29 pages, 948 KiB

Open AccessReview

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)

► Show Figures

Graphical abstract

Search Results (10)

Further Information

Guidelines

MDPI Initiatives

Follow MDPI

Saved Queries

Search Filter Reset All

Years

Feature Papers

Subjects

Journals

Article Types

Countries / Regions

Search Results (10)

Further Information

Guidelines

MDPI Initiatives

Follow MDPI