Enhancement of the transverse magneto-optical Kerr effect via resonant tunneling in Au/Ce:YIG/Au trilayers and its application

Abstract

We propose a new structure to enhance the transverse magneto-optical Kerr effect (TMOKE) via resonant photon tunneling. In trilayer structures with a magnetic dielectric layer sandwiched between non-magnetic metal layers, an enhanced TMOKE can be observed. The TMOKE in Au/Ce:YIG/Au trilayers with different widths of magnetic dielectric layers are calculated using a 4 × 4 transfer-matrix method, in which the maximum absolute value reaches 0.7. Based on the enhanced TMOKE, we apply the structure proposed above in magnetic field sensing, and TMOKE values are calculated when the external magnetic field intensity is increasing. Compared with other magnetic field sensing methods, the Au/Ce:YIG/ Au trilayer possesses a very simple structure and shows high sensitivity to magnetic field variation, which is promising as a highly integrated and sensitive magneto-optical device.

Ultra-thin magnetic metal with TMOKE-enhanced high performance sensing

“…For refractive index variations of 1 to 1.01, all FOM are well above 10 4 RIU -1 , and in some parts of the system, more than 4×10 4 RIU -1 , which is higher than previously reported. [3,24,27]. In order to highlight the superiority of the MOSPR sensor performance, we compare the sensing performance of the magneto-plasmon system and the surface plasmon system.…”

Transverse magneto-optical behavior of nanoporous ferromagnetic film based on anodic aluminum oxide/aluminum template and its sensing application

“…In this regard, Li exploited resonant tunneling in the magnetic dielectric layer between two metal layers of the same thickness to boost TMOKE for sensing applications. 18 Recently, Wu explored Tamm plasmon polaritons in multilayered systems consisting of alternating magnetic and nonmagnetic dielectric films that formed Bragg reflectors on Au mirrors, 19 and with magnetic films inserted between the Bragg reflectors and Au mirrors. 20 In this paper, we use a theoretical approach to propose an easy-to-fabricate structure consisting of hexagonal periodic nanopore CoFeB arrays on an anodic aluminum oxide layer supported by an alumina sheet (AAO/Al).…”

“…In this regard, Li exploited resonant tunneling in the magnetic dielectric layer between two metal layers of the same thickness to boost TMOKE for sensing applications. 18 Recently, Wu explored Tamm plasmon polaritons in multilayered systems consisting of alternating magnetic and nonmagnetic dielectric films that formed Bragg reflectors on Au mirrors, 19 and with magnetic films inserted between the Bragg reflectors and Au mirrors. 20…”