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Articles de revues sur le sujet « Light-Induced magnetism »

Auteur : Grafiati
Publié le 9 novembre 2024

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1

Cheng, Oscar Hsu-Cheng, Dong Hee Son et Matthew Sheldon. « Light-induced magnetism in plasmonic gold nanoparticles ». Nature Photonics 14, no 6 (16 mars 2020) : 365–68. http://dx.doi.org/10.1038/s41566-020-0603-3.

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Many, Véronique, Romain Dézert, Etienne Duguet, Alexandre Baron, Vikas Jangid, Virginie Ponsinet, Serge Ravaine, Philippe Richetti, Philippe Barois et Mona Tréguer-Delapierre. « High optical magnetism of dodecahedral plasmonic meta-atoms ». Nanophotonics 8, no 4 (20 décembre 2018) : 549–58. http://dx.doi.org/10.1515/nanoph-2018-0175.

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AbstractThe generation in artificial composites of a magnetic response to light, comparable in magnitude with the natural electric response, may offer an invaluable control parameter for a fine steering of light at the nanoscale. In many experimental realizations, however, the magnetic response of artificial meta-atoms is too weak so that there is a need for new designs with increased magnetic polarizability. Numerical simulations show that geometrical plasmonic nanostructures based on Platonic solids are excellent candidates for the production of strong optical magnetism in visible light. Inspired by these models, we report a bottom-up approach to synthesize plasmonic nanoclusters made of 12 gold patches located at the center of the faces of a dodecahedron. The scattering of the electric and magnetic dipole induced by light is measured across the whole visible range. The ratio of the magnetic to electric response at resonance is found three times higher than its counterpart measured on disordered plasmonic clusters (“plasmonic raspberries”) of the same size. Numerical simulations confirm the experimental measurements of the magnetic response.
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Epstein, Arthur J. « Organic-Based Magnets : Opportunities in Photoinduced Magnetism, Spintronics, Fractal Magnetism, and Beyond ». MRS Bulletin 28, no 7 (juillet 2003) : 492–99. http://dx.doi.org/10.1557/mrs2003.145.

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AbstractThis article is based on a presentation on organic-based magnets given as part of Symposium X—Frontiers of Materials Research on December 4, 2002, at the 2002 Materials Research Society Fall Meeting in Boston. The advent of organic-based magnets opened the opportunity for tuning magnetic properties by molecular design and the discovery of new phenomena that rely on the internal structure of the molecules that make up these magnets. In the past 18 years, numerous classes of organic-based ferromagnets, ferrimagnets, and spin glasses (spins essentially frozen in place without long-range order) have been reported. These materials have magnetic ordering temperatures ranging from <1 K to above room temperature and demonstrate many of the magnetic properties associated with conventional magnets. This article concentrates on new phenomena that are unique to organic-based magnets. Three of these effects—“high-temperature” light-induced magnetism, spin-polarized magnetic organic semiconductors with the potential for spintronics, and the development of fractal magnetic order—are discussed to illustrate the richness of opportunity in organic-based magnets.
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Zeng, Jinwei, Mohammad Kamandi, Mahsa Darvishzadeh-Varcheie, Mohammad Albooyeh, Mehdi Veysi, Caner Guclu, Mina Hanifeh et al. « In pursuit of photo-induced magnetic and chiral microscopy ». EPJ Applied Metamaterials 5 (2018) : 7. http://dx.doi.org/10.1051/epjam/2018002.

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Light-matter interactions enable the perception of specimen properties such as its shape and dimensions by measuring the subtle differences carried by an illuminating beam after interacting with the sample. However, major obstacles arise when the relevant properties of the specimen are weakly coupled to the incident beam, for example when measuring optical magnetism and chirality. To address this challenge we propose the idea of detecting such weakly-coupled properties of matter through the photo-induced force, aiming at developing photo-induced magnetic or chiral force microscopy. Here we review our pursuit consisting of the following steps: (1) Development of a theoretical blueprint of a magnetic nanoprobe to detect a magnetic dipole oscillating at an optical frequency when illuminated by an azimuthally polarized beam via the photo-induced magnetic force; (2) Conducting an experimental study using an azimuthally polarized beam to probe the near fields and axial magnetism of a Si disk magnetic nanoprobe, based on photo-induced force microscopy; (3) Extending the concept of force microscopy to probe chirality at the nanoscale, enabling enantiomeric detection of chiral molecules. Finally, we discuss difficulties and how they could be overcome, as well as our plans for future work.
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Lohmann, Sven‐Hendrik, Tong Cai, Darien J. Morrow, Ou Chen et Xuedan Ma. « Brightening of Dark States in CsPbBr 3 Quantum Dots Caused by Light‐Induced Magnetism ». Small 17, no 37 (8 août 2021) : 2101527. http://dx.doi.org/10.1002/smll.202101527.

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Wang, Yihua. « Broken-symmetry states in topological insulators ». Modern Physics Letters B 29, no 25 (20 septembre 2015) : 1530006. http://dx.doi.org/10.1142/s0217984915300069.

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Breaking the time-reversal symmetry (TRS) on the surface of a three-dimensional topological insulator (TI) transforms its metallic surface into a Chern insulator. The TRS-broken surface states are essential for many exotic emergent particles in condensed matter. In this review, I will show broken TRS surface states of TI induced by magnetism and by light imaged with scanning microscopy and photoemission spectroscopy, respectively. Our capability to manipulate mesoscopic magnetic structures as well as to shape ultrafast light pulses makes broken-symmetry states in TI promising platforms to simulate elusive fundamental particles such as magnetic monopoles and Majorana fermions.
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KUZEMSKY, A. L. « UNCONVENTIONAL AND EXOTIC MAGNETISM IN CARBON-BASED STRUCTURES AND RELATED MATERIALS ». International Journal of Modern Physics B 27, no 11 (25 avril 2013) : 1330007. http://dx.doi.org/10.1142/s0217979213300077.

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The detailed analysis of the problem of possible magnetic behavior of the carbon-based structures was fulfilled to elucidate and resolve (at least partially) some unclear issues. It was the purpose of the present paper to look more critically into some conjectures which have been made and to the peculiar and contradictory experimental results in this rather indistinct and disputable field. First the basic physics of magnetism was briefly addressed. Then a few basic questions were thoroughly analyzed and critically reconsidered to elucidate the possible relevant mechanism (if any) which may be responsible for observed peculiarities of the "magnetic" behavior in these systems. The arguments supporting the existence of the intrinsic magnetism in carbon-based materials, including pure graphene were analyzed critically. It was concluded that recently published works have shown that the results of the previous studies, where the "ferromagnetism" was detected in pure graphene, were incorrect. Rather, graphene is strongly diamagnetic, similar to graphite. Thus the possible traces of a quasi-magnetic behavior which some authors observed in their samples may be attributed rather to induced magnetism due to the impurities, defects, etc. On the basis of the present analysis the conclusion was made that the thorough and detailed experimental studies of these problems only may shed light on the very complicated problem of the magnetism of carbon-based materials. Lastly the peculiarities of the magnetic behavior of some related materials and the trends for future developments were mentioned.
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Lü, Xiao-Long, et Hang Xie. « Topological edge states and transport properties in zigzag stanene nanoribbons with magnetism ». New Journal of Physics 24, no 3 (1 mars 2022) : 033010. http://dx.doi.org/10.1088/1367-2630/ac4009.

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Abstract In this work, we investigate the topological phase transitions and corresponding transport properties in zigzag stanene nanoribbon with different magnetism. The results show that the off-resonant circularly polarized (ORCP) light may induce anisotropic chiral edge state with a magnetic phase transition from antiferromagnetic state to nonmagnetic state. In combination with the ORCP light and electric field, the 100% spin-polarized edge state can be induced with some magnetic orders. The finite-size effect is also an important factor for the magnetic phase transitions, which in turn induces topological phase transitions from the band insulator to topological phases. By constructing the topological-insulator junctions with some topological edge states, we further study the Fabry–Perot resonant, where multiple reflection edge states cause strong current loops. By modulating the ORCP and electric field, the system can also be regarded as a switcher, to control the charge current or spin polarized current. These findings pave a way for designing topological device with magnetic edges in the future nano spintronics.
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Marzal, Vicente, Juan Carlos Torres, Isabel Pérez, José Manuel Sánchez-Pena et Braulio García-Cámara. « Induced Magnetic Anisotropy in Liquid Crystals Doped with Resonant Semiconductor Nanoparticles ». Journal of Nanomaterials 2016 (2016) : 1–9. http://dx.doi.org/10.1155/2016/7659074.

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Currently, there are many efforts to improve the electrooptical properties of liquid crystals by means of doping them with different types of nanoparticles. In addition, liquid crystals may be used as active media to dynamically control other interesting phenomena, such as light scattering resonances. In this sense, mixtures of resonant nanoparticles hosted in a liquid crystal could be a potential metamaterial with interesting properties. In this work, the artificial magnetism induced in a mixture of semiconductor nanoparticles surrounded by a liquid crystal is analyzed. Effective magnetic permeability of mixtures has been obtained using the Maxwell-Garnett effective medium theory. Furthermore, permeability variations with nanoparticles size and their concentration in the liquid crystal, as well as the magnetic anisotropy, have been studied.
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Kitagawa, Jiro, Kohei Sakaguchi, Tomohiro Hara, Fumiaki Hirano, Naoki Shirakawa et Masami Tsubota. « Interstitial Atom Engineering in Magnetic Materials ». Metals 10, no 12 (6 décembre 2020) : 1644. http://dx.doi.org/10.3390/met10121644.

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Interstitial light elements play an important role in magnetic materials by improving the magnetic properties through changes of the unit cell volume or through orbital hybridization between the magnetic and interstitial atoms. In this review focusing on the effects of interstitial atoms in Mn-based compounds, which are not well researched, the studies of interstitial atoms in three kinds of magnetic materials (rare-earth Fe-, Mn-, and rare-earth-based compounds) are surveyed. The prominent features of Mn-based compounds are interstitial-atom-induced changes or additional formation of magnetism—either a change from antiferromagnetism (paramagnetism) to ferromagnetism or an additional formation of ferromagnetism. It is noted that in some cases, ferromagnetic coupling can be abruptly caused by a small number of interstitial atoms, which has been overlooked in previous research on rare-earth Fe-based compounds. We also present candidates of Mn compounds, which enable changes of the magnetic state. The Mn-based compounds are particularly important for the easy fabrication of highly functional magnetic devices, as they allow on-demand control of magnetism without causing a large lattice mismatch, among other advantages.
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Náfrádi, Bálint, Péter Szirmai, Massimo Spina, Andrea Pisoni, Xavier Mettan, Norbert M. Nemes, László Forró et Endre Horváth. « Tuning ferromagnetism at room temperature by visible light ». Proceedings of the National Academy of Sciences 117, no 12 (9 mars 2020) : 6417–23. http://dx.doi.org/10.1073/pnas.1915370117.

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Most digital information today is encoded in the magnetization of ferromagnetic domains. The demand for ever-increasing storage space fuels continuous research for energy-efficient manipulation of magnetism at smaller and smaller length scales. Writing a bit is usually achieved by rotating the magnetization of domains of the magnetic medium, which relies on effective magnetic fields. An alternative approach is to change the magnetic state directly by acting on the interaction between magnetic moments. Correlated oxides are ideal materials for this because the effects of a small external control parameter are amplified by the electronic correlations. Here, we present a radical method for reversible, light-induced tuning of ferromagnetism at room temperature using a halide perovskite/oxide perovskite heterostructure. We demonstrate that photoinduced charge carriers from theCH3NH3PbI3photovoltaic perovskite efficiently dope the thinLa0.7Sr0.3MnO3film and decrease the magnetization of the ferromagnetic state, allowing rapid rewriting of the magnetic bit. This manipulation could be accomplished at room temperature; hence this opens avenues for magnetooptical memory devices.
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Yamaguchi, Akinobu, Takuo Ohkochi, Masaki Oura, Keisuke Yamada, Tsunemasa Saiki, Satoru Suzuki, Yuichi Utsumi et Aiko Nakao. « X-ray Photoemission Spectroscopy Study of Uniaxial Magnetic Anisotropy Induced in a Ni Layer Deposited on a LiNbO3 Substrate ». Nanomaterials 11, no 4 (16 avril 2021) : 1024. http://dx.doi.org/10.3390/nano11041024.

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The competition between magnetic shape anisotropy and the induced uniaxial magnetic anisotropy in the heterojunction between a ferromagnetic layer and a ferroelectric substrate serves to control magnetic domain structures as well as magnetization reversal characteristics. The uniaxial magnetic anisotropy, originating from the symmetry breaking effect in the heterojunction, plays a significant role in modifying the characteristics of magnetization dynamics. Magnetoelastic phenomena are known to generate uniaxial magnetic anisotropy; however, the interfacial electronic states that may contribute to the uniaxial magnetic anisotropy have not yet been adequately investigated. Here, we report experimental evidence concerning the binding energy change in the ferromagnetic layer/ferroelectric substrate heterojunction using X-ray photoemission spectroscopy. The binding energy shifts, corresponding to the chemical shifts, reveal the binding states near the interface. Our results shed light on the origin of the uniaxial magnetic anisotropy induced from the heterojunction. This knowledge can provide a means for the simultaneous control of magnetism, mechanics, and electronics in a nano/microsystem consisting of ferromagnetic/ferroelectric materials.
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Lin, Shirong, Zhongquan Nie, Weichao Yan, Yao Liang, Han Lin, Qing Zhao et Baohua Jia. « All-optical vectorial control of multistate magnetization through anisotropy-mediated spin-orbit coupling ». Nanophotonics 8, no 12 (26 septembre 2019) : 2177–88. http://dx.doi.org/10.1515/nanoph-2019-0198.

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AbstractThe interplay between light and magnetism is considered as a promising solution to fully steer multidimensional magnetic oscillations/vectors, facilitating the development of all-optical multilevel recording/memory technologies. To date, impressive progress in multistate magnetization instead of a binary level has been witnessed by primarily resorting to double laser beam excitation. Yet, the control mechanisms are limited to specific magnetic medium or intricate optical configuration as well as overlooking the crystallographic architecture of the media and the polarization-phase linkage of the light fields. Here, we theoretically present a novel all-optical strategy for generating arbitrary multistate magnetization through the inverse Faraday effect. This is achieved by strongly focusing a single vortex-phase configured beam with circular polarization onto the anisotropic magnetic medium. By judiciously tuning the topological charge effect, the optical anisotropic effect, and the anisotropic optomagnetic effect, the light-induced magnetic vector can be flexibly redistributed between its transverse and longitudinal components, thus enabling orientation-unlimited multilevel magnetization control. In this optomagnetic process, we also reveal the role of anisotropy-mediated spin-orbit coupling, another physical mechanism that enables the effective translation of the angular momentum of light fields to the magnetic system. Furthermore, the conceptual paradigm of all-optical multistate magnetization is verified. Our findings show great prospect in multidimensional high-density optomagnetic recording and memory devices and also in high-speed information processing science and technology.
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Mercaldo, Lucia V., Vladimir V. Talanov, Steven M. Anlage, Carmine Attanasio et Luigi Maritato. « Microwave Electrodynamics of low TC and high TC Systems with Coexisting Superconductivity and Magnetism ». International Journal of Modern Physics B 14, no 25n27 (30 octobre 2000) : 2920–25. http://dx.doi.org/10.1142/s0217979200003101.

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We investigate the microwave electrodynamics of both artificial low T C superconducting/magnetic (S/M) layered structures and high T C cuprates. In particular we focus on Nb/CuMn (superconducting/spin-glass) bilayers, and on GbBa 2 Cu 3 O 7-δ (GBCO) thin films, which show coexistence of superconductivity and long range ordered antiferromagnetism below T N = 2.2 K . In both cases we are interested in the influence of magnetism on superconducivity. Moreover, in the GBCO case, we want to shed light on the problem of the determination of the pairing symmetry in the cuprates. First we show surface impedance data at 10 GHz on Nb/CuMn bilayers. We extract information about the induced order parameter in the magnetic layer and we compare it with the exotic behavior predicted for S/M proximity systems. Then we present microwave surface impedance data at three different frequencies on GBCO c-axis oriented epitaxial thin films. Both the resistance and the reactance data on GBCO show an unusual low temperature behavior, mainly due to change in magnetic permeability. This result indicates that the paramagnetism of the rare-earth ions has to be taken into account when extracting the superconducting penetration depth as a function of temperature, and thus determining the pairing state symmetry of the cuprates.
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Hao, Zhentao, et Weihua Li. « A Review of Smart Lubricant-Infused Surfaces for Droplet Manipulation ». Nanomaterials 11, no 3 (21 mars 2021) : 801. http://dx.doi.org/10.3390/nano11030801.

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The nepenthes-inspired lubricant-infused surface (LIS) is emerging as a novel repellent surface with self-healing, self-cleaning, pressure stability and ultra-slippery properties. Recently, stimuli-responsive materials to construct a smart LIS have broadened the application of LIS for droplet manipulation, showing great promise in microfluidics. This review mainly focuses on the recent developments towards the droplet manipulation on LIS with different mechanisms induced by various external stimuli, including thermo, light, electric, magnetism, and mechanical force. First, the droplet condition on LIS, determined by the properties of the droplet, the lubricant and substrate, is illustrated. Droplet manipulation via altering the droplet regime realized by different mechanisms, such as varying slipperiness, electrostatic force and wettability, is discussed. Moreover, some applications on droplet manipulation employed in various filed, including microreactors, microfluidics, etc., are also presented. Finally, a summary of this work and possible future research directions for the transport of droplets on smart LIS are outlined to promote the development of this field.
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Lien, Le Thi Hong, Vu Ngoc Tuoc, Nguyen Viet Minh et Tran Doan Huan. « A First Principles Study on Electronic and Magnetic Properties of Defects in ZnO/GaN Core-shell Nanowire Heterostructures ». Communications in Physics 24, no 3S1 (13 novembre 2014) : 127–35. http://dx.doi.org/10.15625/0868-3166/24/3s1/5463.

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To date semiconductor nanowire (NW) heterostructures (HS) have attracted extensive attention as important components of electronic and optoelectronic nanodevices. Further NWs also show promising potency to enhance the solar energy harvesting, e.g. improving both light trapping, photo-carrier collection, and contacting surface area. In this work we show theoretically that the \(d^{0}\)-ferromagnetism and NW HS bandgap can be turned by engineering the HS interfaces in non-magnetic ZnO/GaN core/shell NW HS. In that NW HS the incorporation of one compound into the other leads to the bandgap narrowing in the nonisovalent alloy because of the type II band alignment betwwen ZnO and GaN. The \(d^{0}\)-ferromagnetic interface can be developed by creating \(p\)-type defect with \(N\) and/or \(n\)-type defect with Zn in Ga--O interface bonds due to the defect-induced polar discontinuity. It's noted that the GaN/ZnO NW HS itself without defect or with same number defects of both types are not ferromagnetic. So that the induced magnetic moment is suggested to be related to the missing charge introduced at these defects. In our study we focused on the effects of GaN/ZnO interfaces on the electronic and magnetic properties, e.g. interface states within the bandgap and interface-induced ferromagnetism and impact of surface reconstruction and quantum confinement. The origin of this \(d^{0}\)-FM is revealed by analyses of spin-polarized bandstructure indicated by the asymmetrical spin-up and spin-down states near the Fermi level, the projected densities of states (PDOSs) and the spin-polarized mulliken charge differences, indicated that most spin-polarized states are dominated by the interface defect site N$p$ electrons. The calculated GaN/ZnO interface magnetism, have been compared with FM at the LaAlO\(-SrTiO\(_{3}\) interface which are theoretically predicted [30] and experimentally confirmed [31], where the magnetic moments also arise from the polar discontinuity.
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Zhou, Ziyao, Qu Yang, Ming Liu, Zhiguo Zhang, Xinyang Zhang, Dazhi Sun, Tianxiang Nan, Nianxiang Sun et Xing Chen. « Antiferroelectric Materials, Applications and Recent Progress on Multiferroic Heterostructures ». SPIN 05, no 01 (mars 2015) : 1530001. http://dx.doi.org/10.1142/s2010324715300017.

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Antiferroelectric (AFE) materials with adjacent dipoles oriented in antiparallel directions have a double polarization hysteresis loops. An electric field (E-field)-induced AFE–ferroelectric (FE) phase transition takes place in such materials, leading to a large lattice strain and energy change. The high dielectric constant and the distinct phase transition in AFE materials provide great opportunities for the realization of energy storage devices like super-capacitors and energy conversion devices such as AFE MEMS applications. Lots of work has been done in this field since 60–70 s. Recently, the strain tuning of the spin, charge and orbital orderings and their interactions in complex oxides and multiferroic heterostructures have received great attention. In these systems, a single control parameter of lattice strain is used to control lattice–spin, lattice–phonon, and lattice–charge interactions and tailor properties or create a transition between distinct magnetic/electronic phases. Due to the large strain/stress arising from the phase transition, AFE materials are great candidates for integrating with ferromagnetic (FM) materials to realize in situ manipulation of magnetism and lattice-ordered parameters by voltage. In this paper, we introduce the AFE material and it's applications shortly and then review the recent progress in AFEs based on multiferroic heterostructures. These new multiferroic materials could pave a new way towards next generation light, compact, fast and energy efficient voltage tunable RF/microwave, spintronic and memory devices promising approaches to in situ manipulation of lattice-coupled order parameters is to grow epitaxial oxide films on FE/ferroelastic substrates.
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Dong, Xiujia, Yao Ding, Zhengyang Bai et Guoxiang Huang. « Magnetic-field-induced deflection of nonlocal light bullets in a Rydberg atomic gas ». Chinese Optics Letters 20, no 4 (2022) : 041902. http://dx.doi.org/10.3788/col202220.041902.

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Jiang, Qianli, Hao Huang, Yongjun Zhou, Qiuxia Zhang, Sun Xiaowei, Minchun Zhang, Yanyan Ye et al. « Magic-TT (Magnetism-induced cell target transplantation) Enhanced the CD45+ Cells Target Migration, in Situ Proliferation and Promotion of Hematopoietic Recovery after Transplantation ». Blood 126, no 23 (3 décembre 2015) : 5404. http://dx.doi.org/10.1182/blood.v126.23.5404.5404.

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Abstract Background: In our previous work (56th ASH poster, No.2416), we developed a novel cell transplantation system named MagIC-TT. The purpose of this study is to explore whether the MagIC-TT can promote hematopoietic recovery in the mice experiment and illustrate it¡¯s mechanism both in vivo and in vitro. Methods: 1) In vivo study: With regard to auto-transplantation, the C57BL/6 CD45-GFP cells were sorted and magnetized from the bone marrow of C57BL/6-Tg(CAG-EGFP) mice. Forty C57BL/6 female mice (2 groups, twenty mice each group) were transplanted into the femur cavity with or without magnetic field (M or W group), after 7.5Gy irradiation. Following transplantation, the survival of mice, hematopoiesis as well as GFP+ cells in different tissues, such as peripheral blood, bone marrow, liver, spleen, thymus and lung etc. were observed. Femurs of recipients were decalcified with our own derived semi-solid decalcification (SSD) technique to illustrate the distribution, proliferation of donor cells and the relationship between recipients and donor cells. Allo-transplantation: The C57BL/6 CD45-GFP cells were injected into the femur cavity of FVB mRFP transgenic mice (sponsored by Prof. XH Wu, Fudan University, Shanghai, China) after 7.5Gy irradiation. GVHD was observed in addition to what was done in auto-transplantation. 2) In vitro study: Magnetized CD45-GFP cells and non-magnetized BMSC-RFPs were cultured respectively or co-cultured with or without magnetic field (M or W group). The magnetic field was added to the top or the bottom of cell culture dish. Cell morphology, cell proliferation, cell viability, as well as cell migration, transwell migration and matrigel migration assays induced by magnetism were studied. The interaction of CD45-GFP cells and BMSC-RFPs was observed by confocal microscope, electronic microscope, immunohistochemical staining, western blot, real-time PCR and deep sequencing. Results: 1) In vivo study: During the first few hours after transplantation, lots of magnetized CD45-GFP cells resided within the femur and knee joints in M group while few in W group. Many GFP cells migrated into the lung soon after transplantation in the W group (P =0.046), followed by other organs such as kidney and skin (Fig.1). FACS showed that more GFP+ cells resided within the target femurs than the controls (Table.1). With SSD, frozen sections, confocal microscope and Lightsheet Z.1 Microimage (Carl Zeiss); transplanted GFP+ cells and their micro-environment were all well demonstrated (Fig.1). On removal of magnetic field, CD45-GFP cells were observed to migrate into the spleen, kidney, gut and other organs, showing the slow release of target transplanted cells from femur. GVHD on skin and lung etc. were observed in C57BL/6 to FVB allogenic transplanted mice (Fig. 1). The hematopoietic recovery in M group occurs much earlier than the controls, especially for the platelets, 10.67d ¡À 1.53d vs 14.75d ¡À 2.06d (M vs W group, P =0.035). 2) In vitro study: With the help of MagIC-TT, CD45-GFP cells can migrate through the matrigel and transwell membranes much more efficiently. The magnetized CD45-GFP cells advance toward the inner roof of petri dish in the culture medium, and attach to BMSC-RFP growing on the inner roof of dish and proliferate in the niche composed by BMSC-RFP under the effect of magnetic field (Fig.2). Conclusion: MagIC-TT could enhance CD45+ cells target migration, improve stem cell homing and proliferation efficiency, as well as promotion hematopoietic recovery in vivo. This study would shed light on current Hematological Stem Cell Transplantation (HSCT) and other cell therapies. Table 1. The FACS results of femurs of CD45-GFP cells injected into C57 mice, at 0.5h, 24h and 72h respectively. group 0.5h£¨%£© p 24h£¨%£© p 72h£¨%£© p *LC **RT *LC **RT *LC **RT BMM 0.017¡À0.006 0.497¡À0.151 0.040 0.080¡À0.026 1.573¡À0.508 0.030 0.190¡À0.139 1.960¡À0.809 0.049 BMW 0.017¡À0.012 0.050¡À0.017 0.184 0.013¡À0.006 0.027¡À0.015 0.184 0.023¡À0.015 0.320¡À0.434 0.368 P 1.000 0.007 0.013 0.006 0.108 0.036 *LC: Control femur without magnetic field (W group); **RT: Treated femur with magnetic field (M group). Disclosures No relevant conflicts of interest to declare.
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Gao Haofeng, 高浩锋, 李晓林 Li Xiaolin, 钮月萍 Niu Yueping et 龚尚庆 Gong Shangqing. « 光诱导原子解吸附实验中的光热效应研究 ». Chinese Journal of Lasers 48, no 23 (2021) : 2312001. http://dx.doi.org/10.3788/cjl202148.2312001.

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Risset, Olivia N., Pedro A. Quintero, Tatiana V. Brinzari, Matthew J. Andrus, Michael W. Lufaso, Mark W. Meisel et Daniel R. Talham. « Light-Induced Changes in Magnetism in a Coordination Polymer Heterostructure, Rb0.24Co[Fe(CN)6]0.74@K0.10Co[Cr(CN)6]0.70·nH2O and the Role of the Shell Thickness on the Properties of Both Core and Shell ». Journal of the American Chemical Society 136, no 44 (23 octobre 2014) : 15660–69. http://dx.doi.org/10.1021/ja5084283.

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Kirilyuk, Andrei, Alexey V. Kimel et Theo Rasing. « Controlling spins with light ». Philosophical Transactions of the Royal Society A : Mathematical, Physical and Engineering Sciences 369, no 1951 (28 septembre 2011) : 3631–45. http://dx.doi.org/10.1098/rsta.2011.0168.

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The interaction of sub-picosecond laser pulses with magnetically ordered materials has developed into an extremely exciting research topic in modern magnetism. From the discovery of sub-picosecond demagnetization over a decade ago to the recent demonstration of magnetization reversal by a single 40 fs laser pulse, the manipulation of spins by ultrashort laser pulses has become a fundamentally challenging topic with a potentially high impact for future spintronics, data storage and manipulation, and quantum computation. We have recently demonstrated that one can generate ultrashort and very strong (teslas) magnetic field pulses via the so-called inverse Faraday effect. Such optically induced magnetic field pulses provide unprecedented means for the generation, manipulation and coherent control of spins on very short time scales. The basic ideas behind these so-called opto-magnetic effects will be discussed and illustrated with recent results, demonstrating the various possibilities of this new field of femto-magnetism.
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LIAO Qinghong, 廖庆洪, 宋梦林 SONG Menglin, 孙建 SUN Jian et 邱海燕 QIU Haiyan. « 光学参量放大器辅助的复合腔磁系统中磁力诱导透明及快慢光效应 ». ACTA PHOTONICA SINICA 53, no 2 (2024) : 0227001. http://dx.doi.org/10.3788/gzxb20245302.0227001.

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Zhao, Yi, Qiuping Huang, Honglei Cai, Xiaoxia Lin, Hongchuan He, Hao Cheng, Tian Ma et Yalin Lu. « Ultrafast control of slow light in THz electromagnetically induced transparency metasurfaces ». Chinese Optics Letters 19, no 7 (2021) : 073602. http://dx.doi.org/10.3788/col202119.073602.

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Guo Rui, 郭锐, 杨文海 Yang Wenhai, 郭咏 Guo Yong et 姚慧 Yao Hui. « 1064 nm高功率明亮压缩态光场制备实验中绿光诱导红外吸收效应 ». Acta Optica Sinica 43, no 10 (2023) : 1027001. http://dx.doi.org/10.3788/aos222031.

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Yang Jiaqi, 杨佳琦, 刘加东 Liu Jiadong et 刘涛 Liu Tao. « 基态超精细能级光泵浦效应对原子光致漂移速率影响研究 ». Acta Optica Sinica 41, no 10 (2021) : 1002002. http://dx.doi.org/10.3788/aos202141.1002002.

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Wu, Wenbo, Runli Tang, Qianqian Li et Zhen Li. « Functional hyperbranched polymers with advanced optical, electrical and magnetic properties ». Chemical Society Reviews 44, no 12 (2015) : 3997–4022. http://dx.doi.org/10.1039/c4cs00224e.

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This review summarizes the recent progress in functional HBPs and their application in optics, electronics and magnetics, including light-emitting devices, aggregation-induced emission materials, nonlinear optical materials, chemosensors, solar cells, magnetic materials, etc., and provides outlooks for further exploration in the field.
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Das, Raja, Chiran Witanachchi, Zohreh Nemati, Vijaysankar Kalappattil, Irati Rodrigo, José Ángel García, Eneko Garaio et al. « Magnetic Vortex and Hyperthermia Suppression in Multigrain Iron Oxide Nanorings ». Applied Sciences 10, no 3 (22 janvier 2020) : 787. http://dx.doi.org/10.3390/app10030787.

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Single-crystal iron oxide nanorings have been proposed as a promising candidate for magnetic hyperthermia application because of their unique shape-induced vortex-domain structure, which supports good colloidal stability and enhanced magnetic properties. However, the synthesis of single crystalline iron oxide has proven to be challenging. In this article, we showed that chemically synthesized multigrain magnetite nanorings disfavor a shape-induced magnetic vortex-domain structure. Our results indicate that the multigrain Fe3O4 nanorings with an average outer diameter of ~110 nm and an inner to outer diameter ratio of ~0.5 do not show a shape-induced vortex-domain structure, which was observed in the single-crystal Fe3O4 nanorings of similar dimensions. At 300 Ks, multigrain magnetite nanorings showed an effective anisotropy field of 440 Oe, which can be attributed to its high surface area and intraparticle interaction. Both calorimetric and AC loop measurements showed a moderate inductive heating efficiency of multigrain magnetite nanorings of ~300 W/g at 800 Oe. Our results shed light on the magnetic ground states of chemically synthesized multigrain Fe3O4 nanorings.
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Li, Shulei, Lidan Zhou, Mingcheng Panmai, Jin Xiang et Sheng Lan. « Magnetic plasmons induced in a dielectric-metal heterostructure by optical magnetism ». Nanophotonics 10, no 10 (9 juillet 2021) : 2639–49. http://dx.doi.org/10.1515/nanoph-2021-0146.

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Abstract We investigate numerically and experimentally the optical properties of the transverse electric (TE) waves supported by a dielectric-metal heterostructure. They are considered as the counterparts of the surface plasmon polaritons (i.e., the transverse magnetic (TM) waves) which have been extensively studied in the last several decades. We show that TE waves with resonant wavelengths in the visible light spectrum can be excited in a dielectric-metal heterostructure when the optical thickness of the dielectric layer exceeds a critical value. We reveal that the electric and magnetic field distributions for the TE waves are spatially separated, leading to higher quality factors or narrow linewidths as compared with the TM waves. We calculate the thickness, refractive index and incidence angle dispersion relations for the TE waves supported by a dielectric-metal heterostructure. In experiments, we observe optical resonances with linewidths as narrow as ∼10 nm in the reflection or scattering spectra of the TE waves excited in a Si3N4/Ag heterostructure. Finally, we demonstrate the applications of the lowest-order TE wave excited in a Si3N4/Ag heterostructure in optical display with good chromaticity and optical sensing with high sensitivity.
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Jia, Hong, Hongming Jiang, Yuping Zhang, Shuxu Hua, Qing Liu, Yuquan Yuan, Yanfei Hu, Feng Peng et Xiaofeng Liu. « Enhanced near-infrared light-induced photoresponse via transition of monocrystalline phase and surface reconstruction ». Chinese Optics Letters 21, no 5 (2023) : 051603. http://dx.doi.org/10.3788/col202321.051603.

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Lu Yang, 路阳, 李俐凡 Li Lifan, 黄秋阳 Huang Qiuyang, 王建飞 Wang Jianfei, 胡晓阳 Hu Xiaoyang, 陈默 Chen Mo et 孟洲 Meng Zhou. « 准分布式声波传感系统瑞利散射串扰抑制技术 ». Acta Optica Sinica 44, no 1 (2024) : 0106029. http://dx.doi.org/10.3788/aos231568.

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Liu, Xiaonan, et Yufei Ma. « Sensitive carbon monoxide detection based on light-induced thermoelastic spectroscopy with a fiber-coupled multipass cell [Invited] ». Chinese Optics Letters 20, no 3 (2022) : 031201. http://dx.doi.org/10.3788/col202220.031201.

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Vainos, Nikos, et Andrei V. Rode. « Light-induced material organization ». Journal of Optics 12, no 12 (11 novembre 2010) : 120301. http://dx.doi.org/10.1088/0240-8978/12/12/120301.

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Morigaki, Kazuo. « Light-induced defect creation processes and light-induced defects in hydrogenated amorphous silicon ». European Physical Journal Applied Physics 90, no 2 (mai 2020) : 20101. http://dx.doi.org/10.1051/epjap/2020190257.

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We have proposed a model of light-induced defect creation processes and light-induced defects. Recently, important results using pulsed electron-nuclear double resonance (ENDOR) by Fehr et al. [M. Fehr, A. Schnegg, C. Teutloff, R. Bittl, O. Astakhov, F. Finger, B. Rech, K. Lips, Phys. Status Solidi A 207, 552 (2010)] have been reported, so that these results are interpreted on the basis of our model. Fehr et al. have observed ENDOR signals due to hydrogen nuclei distributed around a dangling bond. The ENDOR spectra due to hydrogen nuclei being located with distance of r from the dangling bond have been calculated, taking into accounts the dipolar interaction, and also the Fermi-type contact hyperfine interaction for the H-related dangling bond (HDB) that is a dangling bond having hydrogen at a nearby site. The typical features of the observed ENDOR spectra are that the spectrum has a shoulder at the low frequency side from the natural NMR frequency of hydrogen and it has a dip in the central part. The calculated ENDOR spectrum of HDB exhibits such a shoulder. This is consistent with our model of light-induced defects such as HDB. The ENDOR spectra with various values of r are calculated. In this paper, we also deal with the distant ENDOR precisely, using the theory of distant ENDOR by Lambe et al. [J. Lambe, N. Laurance, K.C. McIrvine, R.W. Terhune, Phys. Rev. 122, 1161 (1961)]. The calculated distant ENDOR spectrum shows a dip in the central part. Concerning the dip, Fehr et al. attribute the dip to be due to the suppression of the matrix ENDOR line (this is called the artifact). Thus, it is not obvious whether the dip is due to such an artifact or the central part of the distant ENDOR spectrum.
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35

Ulrich, A., T. Heindl, R. Krücken, A. Morozov, C. Skrobol et J. Wieser. « Electron beam induced light emission ». European Physical Journal Applied Physics 47, no 2 (17 avril 2009) : 22815. http://dx.doi.org/10.1051/epjap/2009062.

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Kamm, Philipp W., James P. Blinco, Andreas-Neil Unterreiner et Christopher Barner-Kowollik. « Green-light induced cycloadditions ». Chemical Communications 57, no 33 (2021) : 3991–94. http://dx.doi.org/10.1039/d1cc00340b.

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Briner, B., et M. Landolt. « Light induced magnetic exchange-coupling ». Zeitschrift f�r Physik B Condensed Matter 96, no 2 (juin 1994) : 291. http://dx.doi.org/10.1007/bf01313296.

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Briner, B., et M. Landolt. « Light induced magnetic exchange-coupling ». Zeitschrift f�r Physik B Condensed Matter 92, no 2 (juin 1993) : 137–39. http://dx.doi.org/10.1007/bf01312168.

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Morozovska, Anna N., Eugeny A. Eliseev et Vyacheslav V. Obukhovsky. « Light Induced Micro-Domains in Ferroelectrics ». Ferroelectrics 288, no 1 (janvier 2003) : 265–75. http://dx.doi.org/10.1080/00150190390211387.

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Grabar, A. A. « Light-induced electric conductivity in sn2P2S6 ». Ferroelectrics 192, no 1 (février 1997) : 155–59. http://dx.doi.org/10.1080/00150199708216184.

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Tralle, I. « On the nonequilibrium light-induced diamagnetism ». European Physical Journal B 22, no 1 (juillet 2001) : 3–10. http://dx.doi.org/10.1007/pl00011132.

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van Olfen, U. « Light-induced transparency in absorbing powders ». physica status solidi (a) 121, no 1 (16 septembre 1990) : K121—K124. http://dx.doi.org/10.1002/pssa.2211210168.

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43

KAGAMI, M., T. YAMASHITA, M. YONEMURA et T. MATSUI. « Light-Induced Self-Written Optical Waveguides ». IEICE Transactions on Electronics E90-C, no 5 (1 mai 2007) : 1061–70. http://dx.doi.org/10.1093/ietele/e90-c.5.1061.

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44

Mrudul, M. S., Álvaro Jiménez-Galán, Misha Ivanov et Gopal Dixit. « Light-induced valleytronics in pristine graphene ». Optica 8, no 3 (18 mars 2021) : 422. http://dx.doi.org/10.1364/optica.418152.

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Song, Kai, Nan Ma, Yogendra Kumar Mishra, Rainer Adelung et Ya Yang. « Achieving Light-Induced Ultrahigh Pyroelectric Charge Density Toward Self-Powered UV Light Detection ». Advanced Electronic Materials 5, no 1 (21 octobre 2018) : 1800413. http://dx.doi.org/10.1002/aelm.201800413.

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46

Rahman, MA, MN Zaman, PK Biswas, S. Sultana et PK Nandy. « Physical separation for upgradation of valuable minerals : a study on sands of the Someswari river ». Bangladesh Journal of Scientific and Industrial Research 50, no 1 (22 juin 2015) : 53–58. http://dx.doi.org/10.3329/bjsir.v50i1.23810.

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The study is carried out to develop a physical separation method for upgradation of valuable minerals from sands of the Someswari River. Understanding the morphology and mineralogy of the heavy minerals may allow development of processing methods that produce the higher grade products. For this purpose, grain size analysis, microscopic, spectroscopic study and feasibility of physical separation by shaking table, electrostatic plate separator and induced roll magnetic separator have been done. Considering the huge quantity of sandy materials of the studied river sands and separation of heavy minerals magnetite, ilmenite and garnet from the bulk sands and further treatment of the light mineral quartz to remove iron coating could be use as glass-sands; either the light mineral quartz or heavy minerals will be the main product. From the overall study by physical separation method, the Someswari River is identified as potential resources for mineral processing.Bangladesh J. Sci. Ind. Res. 50(1), 53-58, 2015
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Kondo, M., T. Nishimiya, K. Saito et A. Matsuda. « Light induced phenomena in microcrystalline silicon ». Journal of Non-Crystalline Solids 227-230 (mai 1998) : 1031–35. http://dx.doi.org/10.1016/s0022-3093(98)00276-2.

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Golikova, O. A., M. M. Kazanin et R. G. Ikramov. « Light-induced defects in a-Si:H ». Journal of Non-Crystalline Solids 164-166 (décembre 1993) : 395–97. http://dx.doi.org/10.1016/0022-3093(93)90573-g.

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Hata, N., et A. Matsuda. « Difference between deposition- and light-induced defects in a-Si:H studied by light-induced annealing experiments ». Journal of Non-Crystalline Solids 164-166 (décembre 1993) : 187–90. http://dx.doi.org/10.1016/0022-3093(93)90522-y.

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Hikita, Tomoyuki, Mitsuho Tanimoto, Yoshiaki Uesu et Boris A. Strukov. « Light-induced ESR of dye-doped KDP ». Ferroelectrics 264, no 1 (janvier 2001) : 229–34. http://dx.doi.org/10.1080/00150190108008574.

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