A popular and quickly developing area of research is plasmonic nanoantennas. Here, we provide an overview of the fundamental principles of operation and applications of innovative ferromagnetic metal-based magneto-plasmonic nanoantennas that operate not only on the power of light but also on the power of external magnetic fields. We show that the enhancement of the magneto-optical effects by magneto-plasmonic nanoantennas adds new degrees of freedom to the control of light at the nanoscale. Innovative biological imaging techniques as well as magneto-plasmonic rulers, ultra-sensitive biosensors, one-way subwavelength waveguides, and remarkable optical transmission structures all make advantage of this characteristic. Additionally, we draw attention to the possibility that some "non-optical" ferromagnetic nanostructures might function as magneto-plasmonic nanoantennas. This unintended additional capability uses well-established optical characterization methods of magnetic nanoparticles to its advantage, and it may be practical for combining nanomagnetism and nanophotonics on a single device.
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D R Patil, North Maharashtra University, India
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Lixiong Shao, Shanghai Jiao Tong University, China
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Musaab Ejaz, Universiti Teknologi PETRONAS (UTP), Malaysia