All-Optical Manipulation of Magnetization in Ferromagnetic Thin Films Enhanced by Plasmonic Resonances

Cheng, Feng; Wang, Chuangtang; Su, Zhaoxian; Wang, Xinjun; Cai, Ziqiang; Liu, Yongmin

doi:10.1021/acs.nanolett.0c02089

Cited by 25 publications

(14 citation statements)

References 58 publications

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“…Under the uniform temperature approximation, the total internal temperature increase of nanosphere i is then (5) where the first and second terms account for direct optical absorption ΔT opt and thermal coupling ΔT th contributions to the total internal temperature, respectively. Naturally, the ratio of these two terms at a common frequency (6) defines a unitless quantity of interest with ζ ≫ 1 and ζ ≪ 1 characterizing qualitatively different temperature profiles. 28 Specifically, the temperature increase is highly localized in the vicinity of the particles for ζ ≫ 1, while there is significant ΔT in regions between particles for ζ ≪ 1.…”

Section: F O R a Fi N I T E S Y S T E M O F P O I N T H E A T S O U R...mentioning

confidence: 99%

Optical Control over Thermal Distributions in Topologically Trivial and Non-Trivial Plasmon Lattices

et al. 2022

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Emergent from the discrete spatial periodicity of plasmonic arrays, surface lattice resonances (SLRs) are characterized as dispersive, high-quality polaritonic modes that can be selectively excited at specific points in their photonic band structure by plane-wave light of varying frequency, polarization, and angle of incidence. Room-temperature Bose–Einstein condensation of exciton polaritons, lasing, and nonlinear matter-wave physics have all found origins in SLR systems, but to date, little attention has been paid to their thermal behavior. Here, we combine analytical theory and numerical calculations to investigate the photothermal properties of SLRs in periodic 1D and 2D arrays of plasmonic nanoparticles coupled to each other and to the electromagnetic far-field via transverse radiation. Specifically, we demonstrate how to create steady-state SLR thermal gradients spanning from the nanoscale to hundreds of microns that are actively controllable using light in spite of heat diffusion. We also demonstrate the surprising ability to localize thermal gradients at the lattice edges in topologically non-trivial SLR dimer lattices, thereby establishing a class of extraordinary thermal responses that are unconventional in ordinary materials. This work exposes a new direction in thermoplasmonics that has only just now begun to be explored.

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Section: F O R a Fi N I T E S Y S T E M O F P O I N T H E A T S O U R...mentioning

confidence: 99%

Optical Control over Thermal Distributions in Topologically Trivial and Non-Trivial Plasmon Lattices

et al. 2022

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“…In addition, from Eqs. (17) and (18), the Faraday rotation and ellipticity are respectively related to the real and imaginary part of the gyration coefficient g. Importantly, the unique property of the Faraday effect is that it can break the time-reversal symmetry and Lorentz reciprocity. Thus, the polarization rotation is not determined by the propagation of the light wave but by the direction of the external magnetic field.…”

Section: Faraday Effectmentioning

confidence: 99%

“…It is worth noting that Faraday effect has a unique property of breaking the time-reversal symmetry and Lorentz reciprocity, making it applicable to various nonreciprocal devices, such as isolators and circulators. MO metasurfaces based on Faraday and Kerr effects have been widely used in various fields, such as chiral sensing [14], biochemical sensing [15], magnetic field sensing [16], MO storage [17], and MO switch [18]. However, it is challenging to make the nanoscale metasurface achieve a strong response due to the weak effect of the MO material.…”

Section: Introductionmentioning

confidence: 99%

Magnetically controllable metasurface and its application

Huang

et al. 2021

Front. Optoelectron.

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The dynamic control of the metasurface opens up a vital technological approach for the development of multifunctional integrated optical devices. The magnetic field manipulation has the advantages of sub-nanosecond ultra-fast response, non-contact, and continuous adjustment. Thus, the magnetically controllable metasurface has attracted significant attention in recent years. This study introduces the basic principles of the Faraday and Kerr effect of magneto-optical (MO) materials. It classifies the typical MO materials according to their properties. It also summarizes the physical mechanism of different MO metasurfaces that combine the MO effect with plasmonic or dielectric resonance. Besides, their applications in the nonreciprocal device and MO sensing are demonstrated. The future perspectives and challenges of the research on MO metasurfaces are discussed.

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“…Up to now, only a few experimental works on AOS in nanostructures have been reported [9,16,97,98], because of the challenges in characterizing and controlling a magnetic bit with considerably small spatial resolution. Plasmonic effect is expected to be able to control magnetic data bits [130][131][132] at the nanoscale, and using magnetic tunnel junctions would be a simple solution for detection [7].…”

Section: Conclusion and Perspectivementioning

confidence: 99%

Ultrafast optical manipulation of magnetic order in ferromagnetic materials

Wang

Liu

2020

Nano Convergence

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The interaction between ultrafast lasers and magnetic materials is an appealing topic. It not only involves interesting fundamental questions that remain inconclusive and hence need further investigation, but also has the potential to revolutionize data storage technologies because such an opto-magnetic interaction provides an ultrafast and energy-efficient means to control magnetization. Fruitful progress has been made in this area over the past quarter century. In this paper, we review the state-of-the-art experimental and theoretical studies on magnetization dynamics and switching in ferromagnetic materials that are induced by ultrafast lasers. We start by describing the physical mechanisms of ultrafast demagnetization based on different experimental observations and theoretical methods. Both the spin-flip scattering theory and the superdiffusive spin transport model will be discussed in detail. Then, we will discuss laser-induced torques and resultant magnetization dynamics in ferromagnetic materials. Recent developments of all-optical switching (AOS) of ferromagnetic materials towards ultrafast magnetic storage and memory will also be reviewed, followed by the perspectives on the challenges and future directions in this emerging area.

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All-Optical Manipulation of Magnetization in Ferromagnetic Thin Films Enhanced by Plasmonic Resonances

Cited by 25 publications

References 58 publications

Optical Control over Thermal Distributions in Topologically Trivial and Non-Trivial Plasmon Lattices

Optical Control over Thermal Distributions in Topologically Trivial and Non-Trivial Plasmon Lattices

Magnetically controllable metasurface and its application

Ultrafast optical manipulation of magnetic order in ferromagnetic materials

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