Ultracompact high-contrast magneto-optical disk resonator side-coupled to a plasmonic waveguide and switchable by an external magnetic field

Here we propose and study a novel type of plasmonic resonators based on a metal-insulator-metal waveguide and a side-coupled magneto-optical disk controlled by an external magnetic field. The wave-number change and the transmission of surface-plasmon-polaritons (SPPs) can be tuned by altering the ma...

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Bibliographic Details
Published in:Physical review. B 2018-07, Vol.98 (4), p.041406(R), Article 041406
Main Authors: Pae, Ji-Song, Im, Song-Jin, Ho, Kum-Song, Ri, Chol-Song, Ro, Sok-Bong, Herrmann, Joachim
Format: Article
Language:English
Subjects:
Computer simulation
Insertion loss
Insulators
Magnetic fields
Modulation
Polaritons
Resonators
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Summary:Here we propose and study a novel type of plasmonic resonators based on a metal-insulator-metal waveguide and a side-coupled magneto-optical disk controlled by an external magnetic field. The wave-number change and the transmission of surface-plasmon-polaritons (SPPs) can be tuned by altering the magnetic field and reversible on/off switching of the running SPP modes by a reversal of the direction of the external magnetic field is demonstrated. Resonant enhancement of the magnetoplasmonic modulation by more than 200 times leads to a modulation contrast ratio more than tenfold ratio (90-% modulation) keeping a moderate insertion loss within an optical bandwidth of hundreds of GHz. Numerical simulations confirm the predictions by the derived analytical formulas of a high-contrast magnetoplasmonic modulation by the submicrometer ultrasmall disk resonator.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.98.041406