Magneto-plasmonic Nanoantennas

The study of plasmonic nanoantennas is a popular and quickly developing topic. Here, we provide an overview of the fundamental concepts and uses of innovative ferromagnetic metal-based magneto-plasmonic nanoantennas that are driven by external magnetic fields in addition to light. We show that the magneto-plasmonic nanoantennas increase the magneto-optical effects, adding more degrees of freedom to the nanoscale control of light. This characteristic is employed in theoretically unique devices, including one-way subwavelength waveguides, ultrasensitive biosensors, magneto-plasmonic rulers, and remarkable optical transmission structures, as well as in cutting-edge biomedical imaging techniques. We also mention that 'non-optical' ferromagnetic nanostructures might occasionally function as magneto-plasmonic nanoantennas. This unintended additional functionality makes use of well-known optical characterization methods for magnetic nanoparticles, and it may be practical for combining nanomagnetism and nanophotonics on a single device.