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Optical Force and its Applications Based on Heterosexual Phosphorene Waveguide

We study the optical properties of face-to-face phosphorene pairs, including propagation length, optical constraint, and gradient force. The symmetric and antisymmetric plasmonic modes occur on account of the strong anisotropic dispersion of phosphorene. Compared with the antisymmetric mode, the symmetric mode owns stronger optical constraint and much larger gradient force. Based on the large gradient force and high optical constraint, we also propose a scheme of ultra-small phase shifter. Our results may suggest an opportunity for optical manipulation and development of photonic phosphorene-based devices.