KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Physical Sciences and Engineering (PSE) Division
KAUST Grant NumberOCRF-2014-CRG3-62140384
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AbstractWe propose numerically an approach to narrow the plasmon linewidth and enhance the magnetic near field intensity at a magnetic hot spot in a hybridized metal-insulatormetal (MIM) structure. First we insert in part of the dielectric layer of the MIM, at its center, another dielectric material of a high refractive index (HRI). This results in an increase in the magnetic near field enhancement of the magnetic plasmon (MP) resonance by 82% compared with the MIM without the HRI material. We then couple this enhanced MP resonance to a propagating surface plasmon polariton (SPP) to achieve a further enhancement of 438%. The strong coupling between the MP and the SPP is demonstrated by the large anti-crossing in the reflection spectra. The resulting maximum magnetic field enhancement at the gap is ~ |H / Hi|² = 3555.
CitationAlrasheed S, Di Fabrizio E (2017) Giant Magnetic Field Enhancement in Hybridized MIM Structures. IEEE Photonics Technology Letters: 1–1. Available: http://dx.doi.org/10.1109/LPT.2017.2765402.