Article
Physics, Applied
M. L. Meretska, F. H. B. Somhorst, M. Ossiander, Y. Hou, J. Moodera, F. Capasso
Summary: This paper reports on the magneto-optical properties of an electron beam evaporated EuS thin-film characterized at room temperature. The refractive index of EuS was measured using ellipsometry in the visible part of the spectrum. The dispersion curve of the Verdet constant was measured in the wavelength range between 600 and 800 nm. We fitted an analytical expression for the dispersion curve in the range of 663-785 nm. In addition, we find that the Verdet constant of thin-film EuS is one order of magnitude higher than the commonly used terbium gallium garnet crystal.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Ihor Stolyarchuk, Oleh Kuzyk, Olesya Dan'kiv, Andrzej Dziedzic, Gennadiy Kleto, Andriy Stolyarchuk, Andriy Popovych, Ivan Hadzaman
Summary: The radio frequency reactive sputtering technique was used to prepare Zn1-xNixO thin films with 0 <= x <= 0.08. Composite targets were obtained by mixing and pressing NiO and ZnO powders. X-ray diffraction analysis showed that the films had a hexagonal wurtzite structure with (002) plane preferred orientation. The films exhibited different surface morphologies and optical properties depending on the film composition and growth conditions.
Article
Materials Science, Multidisciplinary
Laure Bsawmaii, Emilie Gamet, Sophie Neveu, Damien Jamon, Francois Royer
Summary: The study introduces a simpler all-dielectric device made of a photoresist 1D grating processed on a MO composite planar waveguide. This device produces higher Q-factor resonances and giant MO intensity effects, and has the potential for various sensing applications due to its ability to be processed on a large scale and various substrates.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Physics, Applied
T. G. H. Blank, K. A. Grishunin, A. V. Kimel
Summary: An intense THz pulse excites a high-Q magnetic resonance mode in the antiferromagnetic insulator HoFeO3 via the THz Zeeman torque. Anomalous beating in the magnon dynamics at certain temperatures is observed, which is attributed to the formation of cavity magnon-polaritons. Simulations using Maxwell's equations support this idea. The observed beating pattern depends on the polarization of the probe pulse and can be explained by considering an imaginary Verdet constant.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Zixuan Wei, Wei Yan, Jun Qin, Longjiang Deng, Lei Bi
Summary: In this study, a temperature insensitive Dy:CeIG thin film material was reported, which showed a lower temperature coefficient of Faraday rotation compared to Ce:YIG thin films. Moreover, an experimentally demonstrated temperature insensitive silicon-integrated optical isolator based on Dy:CeIG operated within a specific temperature range.
Article
Physics, Applied
F. Choueikani, D. Jamon, S. Neveu, M. -F. Blanc-Mignon, Y. Lefkir, F. Royer
Summary: Composite thin films containing cobalt ferrite nanoparticles embedded in a silica/zirconia sol-gel matrix demonstrate excellent magneto-optical properties and stable guiding layer characteristics, with the potential for self-biased behavior based on nanoparticle size. The application of a magnetic field during coating enhances the magneto-optical effect, reduces birefringence, and achieves phase matching for guided modes, providing a method to adjust crucial parameters in magneto-optical devices.
JOURNAL OF APPLIED PHYSICS
(2021)
Review
Physics, Applied
Xuetao Gan, Dirk Englund, Dries Van Thourhout, Jianlin Zhao
Summary: Two-dimensional (2D) materials with layered structures have exceptional electronic and optical attributes, making them promising for various functions in light wave technology. In this study, we discuss state-of-the-art optical intensity modulators based on 2D materials, focusing on their operation spectral ranges determined by optical bandgaps. By leveraging the rich electronic structures and light-matter interactions of different 2D materials, we explore the working mechanisms and device architectures of modulators at specific wavelength ranges. These modulators have potential applications in fiber and chip optical communications, as well as chemical bond spectroscopy, free-space communications, and environment/health sensing.
APPLIED PHYSICS REVIEWS
(2022)
Article
Engineering, Electrical & Electronic
Alexis Dufour, Laure Bsawmaii, Damien Jamon, Emmanuel Marin, Sophie Neveu, Stephanie Reynaud, Sylvain Girard, Francois Royer
Summary: An innovative functionalization method is described for enhancing the Faraday effect of microstructured silica-based optical fibers. By varying the process parameters, the film thickness and nanoparticle concentrations can be tailored to optimize the fiber's magneto-optical response, leading to significant polar magneto-optical effects. This method shows promise for designing fiber-based sensors of magnetic fields.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Da Yan, Han Wang
Summary: In this study, the effect of Bi3+ ions on the gyration vector in the dielectric constant of BixY3-xFe5O12 was investigated. The Faraday effect and transmittance of the film with a thickness of 200 nm were calculated, and it was found that Bi3Fe5O12 has a better strengthening effect than Y3Fe5O12. The authors also analyzed the Faraday rotation angle and transmittance with different thicknesses of Bi3Fe5O12, and investigated the effect of the applied magnetic field on the Faraday rotation angle, reaching -58 degrees at a magnetic field of 1.5 T. The magneto-optical film studied in this paper has the advantages of easy preparation and large Faraday rotation angle, providing a new idea for the development of magneto-optical devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Physics, Applied
Manik Kuila, Uday Deshpande, R. J. Choudhary, Parasmani Rajput, D. M. Phase, V. Raghavendra Reddy
Summary: The study investigates the magneto-optical properties of epitaxial cerium-substituted yttrium iron garnet thin films deposited on Gd3Ga5O12 substrates using different O2 partial pressures and film thicknesses. Results show that Kerr rotation increases with an increase in OPP and varies differently with thickness for a given OPP as a function of incident light wavelength. The findings are explained in terms of possible charge transfer mechanisms and optical interference effects.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
E. Schmoranzerova, T. Ostatnicky, J. Kimak, D. Kriegner, H. Reichlova, R. Schlitz, A. Badura, Z. Soban, M. Muenzenberg, G. Jakob, E-J Guo, M. Klaeui, P. Nemec
Summary: We observed a giant quadratic magneto-optical effect in a 50 nm thick YIG layer. Through theoretical and experimental methods, we quantified both linear and quadratic magneto-optical effects in the studied material. The quadratic magneto-optical signal in the thin YIG film exceeded the linear response, reaching values of 450 grads that are comparable with Heusler alloys or ferromagnetic semiconductors. This enhancement is attributed to antiferromagnetic coupling of two Fe sublattices. We also found that the choice of experimental conditions, particularly the wavelength, is crucial for optimizing the quadratic magneto-optical effect.
Article
Materials Science, Multidisciplinary
Douglas F. Franco, Roger G. Fernandes, Jorlandio F. Felix, Valmor R. Mastelaro, Hellmut Eckert, Conrado R. M. Afonso, Younes Messaddeq, Sandra H. Messaddeq, Steeve Morency, Marcelo Nalin
Summary: New magnetic glass compositions based on the (100-x)(60GeO(2) -25B(2)O(3) -4Al(2)O(3) -10Na(2)O-1PbO) -xTb(4)O(7) system were prepared using the melt-quenching technique. The materials were characterized for their structural, thermal, morphological, optical, magnetic, and magneto-optical properties. It was found that the distribution of Tb3+ ions, as well as the magnetic susceptibility, increased proportionally with the rare earth content.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Takian Fakhrul, Stana Tazlaru, Bharat Khurana, Lukas Beran, Jackson Bauer, Michal Vancik, Ariane Marchese, Ekaterina Tsotsos, Miroslav Kucera, Yan Zhang, Martin Veis, Caroline A. Ross
Summary: Films of polycrystalline terbium iron garnet (TbIG), cerium-substituted TbIG (CeTbIG), and bismuth-substituted TbIG (BiTbIG) were successfully grown on Si substrates using pulsed laser deposition. The films grow under tensile strain due to thermal mismatch with the Si substrate, leading to a dominant magnetoelastic anisotropy and in-plane magnetization. Substitution of Ce and Bi reduces the compensation temperature of TbIG, resulting in lower optical absorption and high Faraday rotation, particularly in the case of Bi(0.03)TbIG with a high magneto-optical figure of merit at 1550 nm.
ADVANCED OPTICAL MATERIALS
(2021)
Review
Materials Science, Ceramics
Lixuan Zhang, Dianjun Hu, Ilya L. Snetkov, Stanislav Balabanov, Oleg Palashov, Jiang Li
Summary: In this review, the fabrication and properties of magneto-optical ceramics, including garnet, sesquioxide, and A(2)B(2)O(7) ceramics, are discussed. While some ceramics have shown applicable performance, further studies are needed for most of them. The research status, existing problems, and development trends of magneto-optical ceramics for isolators are also presented and discussed.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Materials Science, Multidisciplinary
Emmanuel Ricohermoso, Florian Klug, Helmut Schlaak, Ralf Riedel, Emanuel Ionescu
Summary: In this study, thin-film strain gauge element arrays were prepared using large-area silicon oxycarbide thin films and structured electrodes. The strain gauge elements exhibited giant piezoresistivity with excellent reversibility and short response times, indicating great potential for MEMS-related applications.
MATERIALS & DESIGN
(2022)
Article
Physics, Applied
A. S. Astrakhantseva, A. Shuvaev, P. A. Gusikhin, A. Pimenov, I. Kukushkin, V. M. Muravev
Summary: We studied the terahertz response of a dielectric membrane with a high-mobility two-dimensional electron system (2DES). The developed device exhibits electromagnetic transparency above the plasma frequency determined by the 2DES density and membrane thickness. Our results demonstrate highly tunable opacity in the low-frequency region, with potential applications in active terahertz devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Charles Babin, Rainer Stoehr, Naoya Morioka, Tobias Linkewitz, Timo Steidl, Raphael Woernle, Di Liu, Erik Hesselmeier, Vadim Vorobyov, Andrej Denisenko, Mario Hentschel, Christian Gobert, Patrick Berwian, Georgy Astakhov, Wolfgang Knolle, Sridhar Majety, Pranta Saha, Marina Radulaski, Nguyen Tien Son, Jawad Ul-Hassan, Florian Kaiser, Joerg Wrachtrup
Summary: Optically addressable spin defects in silicon carbide (SiC) are a promising platform for quantum information processing, enabling high-fidelity spin qubit operations. However, degradation of spin-optical coherence after integration in nanophotonic structures poses a challenge for scalability towards large-scale quantum networks.
Article
Multidisciplinary Sciences
Saquib Shamim, Pragya Shekhar, Wouter Beugeling, Jan Bottcher, Andreas Budewitz, Julian-Benedikt Mayer, Lukas Lunczer, Ewelina M. Hankiewicz, Hartmut Buhmann, Laurens W. Molenkamp
Summary: This study reports the absence of transport gap in disordered two dimensional topological insulators at high magnetic fields. It is observed that at larger fields, only the quantum Hall edge channel with transverse resistance close to h/e(2) exists.
NATURE COMMUNICATIONS
(2022)
Article
Quantum Science & Technology
I. D. Breev, Z. Shang, A. Poshakinskiy, H. Singh, Y. Berencen, M. Hollenbach, S. S. Nagalyuk, E. N. Mokhov, R. A. Babunts, P. G. Baranov, D. Suter, S. A. Tarasenko, G. Astakhov, A. N. Anisimov
Summary: Controllable solid-state spin qubits are important for applied quantum technologies. This study investigates the optical and spin properties of atomic-scale qubits in SiC, and reveals the inverted excited-state fine structure of a specific silicon-vacancy in the 6H-SiC polytype. The study also explores the impact of competing optical spin pumping mechanisms on the spin readout contrast.
NPJ QUANTUM INFORMATION
(2022)
Article
Physics, Applied
V. M. Muravev, A. Shuvaev, A. S. Astrakhantseva, P. A. Gusikhin, I. V. Kukushkin, A. Pimenov
Summary: We have devised an electronically controllable plasmonic modulator based on GaAs semiconductor technology, capable of changing the phase of the transmitted electromagnetic wave. We demonstrated its phase tunability up to 41 degrees at an insertion loss of -2.2 dB. The phase shifter operates at frequencies up to 0.27 THz and temperatures up to 80 K, with the potential for scalability to a planar phased array.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
L. Scheffler, J. Werther, K. Gas, C. Schumacher, C. Gould, M. Sawicki, J. Kleinlein, L. W. Molenkamp
Summary: This study presents a detailed investigation on the influence of molecular beam epitaxial growth conditions on the structural and magnetic characteristics of CuMnSb films on lattice matched GaSb. By varying the Mn and Sb fluxes, materials with different elemental compositions were obtained. The study found that the closest-to-stoichiometric composition, where the Neel temperature attains its maximum values, is achieved when the Mn to Sb flux ratio is approximately 1.24. Mn-related structural defects are believed to be the driving force behind changes in the vertical lattice parameter.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Michael Hollenbach, Nagesh S. Jagtap, Ciaran Fowley, Juan Baratech, Veronica Guardia-Arce, Ulrich Kentsch, Anna Eichler-Volf, Nikolay V. Abrosimov, Artur Erbe, ChaeHo Shin, Hakseong Kim, Manfred Helm, Woo Lee, Georgy V. Astakhov, Yonder Berencen
Summary: This study successfully integrates a group of telecom photon emitters in a two-dimensional array of silicon nanopillars and discovers a waveguiding effect and higher brightness along individual pillars. These results provide a clear pathway for monolithic integration of single-photon emitters in quantum photonic circuits.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Chenjiang Qian, Viviana Villafane, Martin Schalk, G. V. Astakhov, Ulrich Kentsch, Manfred Helm, Pedro Soubelet, Nathan P. Wilson, Roberto Rizzato, Stephan Mohr, Alexander W. Holleitner, Dominik B. Bucher, Andreas V. Stier, Jonathan J. Finley
Summary: In this study, we measured the zero-phonon line (ZPL) wavelength of negatively charged boron vacancies (V-B(-)) in hexagonal boron nitride (hBN) by coupling hBN layer to a high-Q nanobeam cavity. We observed a pronounced intensity resonance when the wavelength of the cavity mode was tuned, indicating the coupling to V-B(-). Spatially resolved measurements showed a clear Purcell effect maximum at the midpoint of the nanobeam.
Article
Chemistry, Multidisciplinary
Alexey Shuvaev, Vlad Dziom, Jan Gospodaric, Elena G. Novik, Alena A. Dobretsova, Nikolay N. Mikhailov, Ze Don Kvon, Andrei Pimenov
Summary: This study investigates the properties of mercury telluride thin films with a critical thickness through magnetooptical spectroscopy. The results show that the material has a gapless Dirac band structure, and the properties of charge carriers can be modulated by doping and optical gating.
Article
Physics, Applied
Alexey Shuvaev, Lei Pan, Lixuan Tai, Peng Zhang, Kang L. L. Wang, Andrei Pimenov
Summary: The integer quantum Hall effect combined with the speed of light provides a dimensionless reference number, the fine-structure constant alpha & AP; 1/137, which can be extracted from a physical experiment. Measuring this constant and its possible variation on cosmological time scales is of great importance for fundamental science. A direct optical experiment can determine the fine-structure constant by measuring the quantized rotation of light polarization, and the quantum anomalous Hall effect allows obtaining a universal quantized value in zero magnetic field.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Arya Thenapparambil, Graciely Elias dos Santos, Chang-An Li, Mohamed Abdelghany, Wouter Beugeling, Hartmut Buhmann, Charles Gould, Song-Bo Zhang, Bjorn Trauzettel, Laurens W. Molenkamp
Summary: Fluctuations in planar magnetotransport in topological HgTe structures are caused by tilted Dirac cones and the formation of charge puddles. The tilted Dirac cones are due to the mix of the Zeeman term and quadratic contributions to the dispersion relation. A network model is developed to mimic the transport of tilted Dirac fermions in the landscape of charge puddles, and it captures the essential features of the experimental data. This model is relevant for interpreting planar magnetotransport in various topological and small bandgap materials.
Article
Materials Science, Multidisciplinary
A. V. Stier, C. J. Meining, V. R. Whiteside, B. D. McCombe, E. I. Rashba, P. Grabs, L. W. Molenkamp
Summary: In sensitive terahertz laser photoresponse measurements, we observed remarkable multiple-line electron spin-resonance spectra in the two-dimensional electron gas of an asymmetric InAs quantum well in the integer quantum Hall effect regime. The observed behavior of multiple sharp features and their splitting can be explained by strong spin orbit coupling effects, effective magnetic fields associated with quantum Hall edge currents, and the behavior of edge channels near the center of the odd plateaus. These results demonstrate the possibility of probing the widths of quantum Hall edge channels and manipulating spins with THz photons having wavelengths several orders of magnitude larger than the edge-channel widths.
Article
Physics, Multidisciplinary
E. Constable, L. Bergen, A. Shuvaev, J. Wettstein, L. Weymann, E. Malysheva, A. Pimenov, M. Guennou
Summary: Spectroscopic measurements were conducted to study the far-infrared phonon dynamics of a model antiferroelectric crystal at low temperature. The observed polar soft mode confirms the expected behavior of a displacive antiferroelectric transition, which involves a close-lying polar phase in an otherwise centrosymmetric structure. The incomplete softening of the polar soft mode provides insight into the energy barrier between neighboring states during the antiferroelectric transition. A biquadratic Landau potential incorporating symmetry constraining effective interactions between displaced ions was used to model the dynamics. Additionally, a scaling of the effective antipolar interaction was observed, indicating sublattice polarization in the antiferroelectric phase.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
M. L. Savchenko, A. Shuvaev, I. A. Dmitriev, S. D. Ganichev, Z. D. Kvon, A. Pimenov
Summary: This study demonstrates that the inherent property of microwave-induced resistance oscillations (MIRO) in solid-state two-dimensional electron systems (2DES) is not immune to the sense of circular polarization. The researchers found that the MIRO signal can be increased up to 30 times for the cyclotron resonance active helicity, which is consistent with the transmission and absorption shape of Drude. Additionally, the study investigates the extrinsic near-field effects that can produce an apparent immunity of the photoresponse using 2DES as a sensitive sensor of the polarization state.
Article
Materials Science, Multidisciplinary
V. Dziom, A. Shuvaev, J. Gospodaric, E. G. Novik, A. A. Dobretsova, N. N. Mikhailov, Z. D. Kvon, Z. Alpichshev, A. Pimenov
Summary: Spin-orbit coupling in thin HgTe quantum wells provides a solid state platform to observe and control nontrivial electrodynamic phenomena. The terahertz (THz) transparency in a 6.5-nm-thick HgTe layer is determined by the fine-structure constant and is close to the critical thickness separating phases with different electronic band structure. THz spectroscopy in a magnetic field provides direct evidence of asymmetric spin splitting of the Dirac cone, enabling optical control of edge spin currents in the quantum wells.
