Abstract
This Perspective surveys the state-of-the-art and future prospects of science and technology employing nanoconfined light (nanophotonics and nanoplasmonics) in combination with magnetism. We denote this field broadly as nanoscale magnetophotonics. We include a general introduction to the field and describe the emerging magneto-optical effects in magnetoplasmonic and magnetophotonic nanostructures supporting localized and propagating plasmons. Special attention is given to magnetoplasmonic crystals with transverse magnetization and the associated nanophotonic non-reciprocal effects and to magneto-optical effects in periodic arrays of nanostructures. We also give an overview of the applications of these systems in biological and chemical sensing, as well as in light polarization and phase control. We further review the area of nonlinear magnetophotonics, the semiconductor spin-plasmonics, and the general principles and applications of opto-magnetism and nano-optical ultrafast control of magnetism and spintronics.
Highlights
During the past two decades, our ability to control materials at the nanoscale allowed a more attentive study of nanoscale light– matter interactions, leading to the advent of nanophotonics and nano-optics
We further review the area of nonlinear magnetophotonics, the semiconductor spin-plasmonics, and the general principles and applications of opto-magnetism and nano-optical ultrafast control of magnetism and spintronics
Research on linear and non-linear magnetoplasmonic nanoantennas and nanoscale magnetophotonics has up to now clearly demonstrated the feasibility of active magnetic manipulation of light at the nanoscale. An impact of such active control on applications has been so far hindered by the weak coupling between magnetism and electromagnetic radiation and the high dissipative losses in the used materials
Summary
During the past two decades, our ability to control materials at the nanoscale allowed a more attentive study of nanoscale light– matter interactions, leading to the advent of nanophotonics and nano-optics. Scitation.org/journal/jap materials and noble metals, which exhibit simultaneously magnetic and plasmonic properties, it became possible to control the plasmon wave vector with a weak (100 mT regime) external magnetic field,[35,36] generate ultrashort SPP pulses,[37] and produce SPP-induced magnetization in nickel with an effective magnetic field of 100 Oe by a femtosecond laser pulse.[38] Hybrid magnetoplasmonic systems combining noble metal and iron garnets that are typically highly transparent compared to ferromagnetic metals provide magnetic modulation of light transmittance. In the transverse MOKE (T-MOKE) configuration, M is lying on the sample surface and oriented perpendicularly to the plane of incidence of the incoming light [Fig. 1(c)] This Perspective covers a plethora of intriguing effects and phenomena associated with light–matter interactions in nanoscale geometries in the presence of a magnetic field.
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