2023
DOI: 10.1039/d3cp00460k
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Enhanced transverse magneto-optical Kerr effect using ferromagnetic metal perforated with nanopore arrays

Abstract: Enhancement of transverse magneto-optical Kerr effects (T-MOKEs) based on surface plasmon resonance has attracted wide attention because of their high sensing performance. Most studies, however, mainly focus on prism-based magnetoplasmonic...

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Cited by 6 publications
(10 citation statements)
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“…This SPR-induced resonance of reflectance can considerably boost the amplitude of the TMOKE signal, as shown in Figure c, where the maximum and minimum values of the TMOKE signal occur almost simultaneously in pairs, as a result of which the TMOKE signal exhibits a distinct Fano shape which has an ultra-narrow line width compared with the U-shaped spectrum. This is a good indication that the TMOKE behavior is well improved owing to the induction of the (−1,0) SPR mode and that the shift in the TMOKE signal relative to the propagating SPR mode is not reciprocal. , …”
Section: Resultsmentioning
confidence: 78%
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“…This SPR-induced resonance of reflectance can considerably boost the amplitude of the TMOKE signal, as shown in Figure c, where the maximum and minimum values of the TMOKE signal occur almost simultaneously in pairs, as a result of which the TMOKE signal exhibits a distinct Fano shape which has an ultra-narrow line width compared with the U-shaped spectrum. This is a good indication that the TMOKE behavior is well improved owing to the induction of the (−1,0) SPR mode and that the shift in the TMOKE signal relative to the propagating SPR mode is not reciprocal. , …”
Section: Resultsmentioning
confidence: 78%
“…Owing to the periodicity at the subwavelength scale, the wave vector k of the m -th diffraction along the x -axis in the surface plane of the nanostructure can be coupled with the wave vector of the surface plasmon polariton (SPP) k spp to form the SPR mode, , which can effectively confine the electromagnetic energy to the interface between Co and medium around the structure as shown in Figure b. This typical optical mode can potentially lead to a high TMOKE response, which evaluates the amplitude of the relative change in reflectance R ( H + ) and R ( H – ) in response to the alternating magnetic fields, i.e., δ TMOKE = 2 × ( R ( H + ) – R ( H – ))/( R ( H + ) + R ( H – )). , Here, SPP is a quasiparticle that describes the coupling of photons to electrons, which is commonly formed at the interface between a metal with a negative dielectric constant and its surrounding medium. The wave vector k spp of SPP can be described as depending on the wave vector k 0 in free space and the refractive indices n m and n d of the metal and medium, that is, .…”
Section: Model and Simulationmentioning
confidence: 99%
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