Magnetic field-induced morphology-dependent resonances of a coupled composite metglas slab with a polymeric optical resonator

ABSTRACT In this article, the effect of an external magnetic field on the morphology‐dependent resonances (MDRs) of a polymeric dielectric microsphere is investigated. The microsphere is mechanically coupled to a composite polymeric Metglas slab. When an external magnetic field is applied to the slab, it elongates leading to a change in the morphology of the microsphere. This in turn leads to a shift in the excited optical resonances. Experiments are carried out to investigate the effect of an external static and harmonic magnetic field on the MDRs shift. The results show that this configuration can be used as an optical magnetic field sensor or as an optical tuning element. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014, 52, 272–275 Magnetostriction is the elastic deformation that arises when a solid is immersed in an external magnetic field. In this work, a spherical polymeric optical resonator is mechanically coupled to a polymeric composite Metglas slab. When an external magnetic field is applied, the Metglas slab deforms, causing a morphological change in the resonator. This highly sensitive device can be used as a tuning optical element or as a magnetic field sensor.