Abstract Due to their promising properties, surface magneto plasmons have attracted great
interests in the field of plasmonics recently. Apart from flexible modulation of
the plasmonic properties by an external magnetic field, surface magneto plasmons
also promise nonreciprocal effect and multi-bands of propagation, which can be
applied into the design of integrated plasmonic devices for biosensing and
telecommunication applications. In the visible frequencies, because it demands
extremely strong magnetic fields for the manipulation of metallic plasmonic
materials, nano-devices consisting of metals and magnetic materials based on
surface magneto plasmon are difficult to be realized due to the challenges in
device fabrication and high losses. In the infrared frequencies, highly-doped
semiconductors can replace metals, owning to the lower incident wave frequencies
and lower plasma frequencies. The required magnetic field is also low, which
makes the tunable devices based on surface magneto plasmons more practically to
be realized. Furthermore, a promising 2D material-graphene shows great potential
in infrared magnetic plasmonics. In this paper, we review the magneto plasmonics
in the infrared frequencies with a focus on device designs and applications. We
investigate surface magneto plasmons propagating in different structures,
including plane surface structures and slot waveguides. Based on the fundamental
investigation and theoretical studies, we illustrate various magneto plasmonic
micro/nano devices in the infrared, such as tunable waveguides, filters, and
beam-splitters. Novel plasmonic devices such as one-way waveguides and
broad-band waveguides are also introduced.