Strong optical force and its confinement applications based on heterogeneous phosphorene pairs

Area of Science:

• Condensed matter physics
• Nanophotonics
• Materials science

Background:

• Phosphorene, a 2D material, exhibits strong anisotropic optical properties.
• Plasmonic properties are crucial for light-matter interactions in nanophotonic devices.

Purpose of the Study:

• To investigate the plasmonic properties of face-to-face phosphorene pairs.
• To analyze optical constraints and gradient forces in these systems.
• To propose phosphorene-based photonic devices for applications like phase shifting.

Main Methods:

• Theoretical study of plasmonic modes in face-to-face phosphorene.
• Analysis of optical constraints and gradient forces based on anisotropic dispersion.
• Device design for an ultra-small phase shifter.

Main Results:

• Symmetric and anti-symmetric plasmonic modes arise from phosphorene's anisotropic dispersion.
• Symmetric modes demonstrate significantly stronger optical constraints and larger gradient forces than anti-symmetric modes.
• An optical constraint of up to 96% was achieved for the symmetric mode with specific layer orientations.

Conclusions:

• Face-to-face phosphorene pairs possess tunable plasmonic properties.
• The strong optical effects in symmetric modes pave the way for advanced nanophotonic applications.
• Proposed phosphorene-based devices offer potential for miniaturized photonic circuits.