Cavity Enhanced Transverse Magneto-optical Kerr Effect of Al\AAO Based Nanostructure Arrays

In this work, reflectance and transverse magneto-optical Kerr effects (TMOKE) were investigated in Py (permalloy) and Py\Ta nanostructures deposited on the anodic aluminum oxide (AAO) template based on aluminum substrate (Al\AAO) via a magnetron sputtering method. It is demonstrated that the increase of TMOKE near reflectance minimum can be tuned by the AAO membrane diameter, and the TMOKE intensity can be enhanced once the Ta layer was introduced, elucidated by influence of high spin-orbit coupling in Ta on TMOKE. This proposed nanostructure conveys a new pathway in the design of advanced magneto-optical devices for optoelectronic and magneto-optical applications.