Abstract
Two-dimensional materials show the ability to manipulate light at extreme subwavelength scales, opening up a new opportunity toward next-generation efficient integrated optical modulator. Herein, we theoretically designed a borophene-based modulator for the effective modulation of transmission through silver nanoslits in telecommunication waveband. Simulations reveal that by simply covering borophene monolayer on silver nanoslits, the transmission of the device can be selectively enhanced due to the excitation of magnetic polaritons. Maximum transmission of larger than 90% can be achieved for both crystal directions of borophene. By further dynamically adjusting the electron density of borophene, the transmission can be continuously modulated, of which the resonant wavelengths can be well predicted by the equivalent inductor-capacitor circuit model. High modulation efficiency of 88.42% can be achieved at 1550 nm. In addition, the device exhibits excellent robustness to incident angles. The designed borophene-based device offers a promising way to achieve the effective transmission modulation.
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