Unusual impulse-momentum relationship in non-reciprocal light interactions

Area of Science:

• Nonlinear optics
• Wave physics
• Condensed matter physics

Background:

• Non-reciprocal interactions, characterized by asymmetric action-reaction, are crucial in natural and artificial systems.
• These interactions are underexplored in nonlinear wave phenomena.
• Optical solitary waves are fundamental entities in nonlinear optics.

Purpose of the Study:

• To investigate the impulse-momentum relationship in optical solitary waves with non-reciprocal internal interactions.
• To explore the consequences of non-reciprocity on wave dynamics and momentum transfer.
• To lay the groundwork for novel non-Hermitian optical devices.

Main Methods:

• Theoretical analysis of optical solitary wave dynamics.
• Numerical simulations of wave propagation under impulse perturbation.
• Characterization of the impulse-momentum relationship.

Main Results:

• An unusual, linear impulse-momentum relationship was observed for optical solitary waves with non-reciprocal interactions.
• The solitary wave exhibited either enhanced or reversed momentum gain relative to the applied impulse.
• The slope of the impulse-momentum relationship was found to be unusual, exceeding one or even being negative.

Conclusions:

• The study reveals a novel impulse-momentum relationship in non-reciprocal nonlinear wave interactions.
• These findings challenge existing paradigms and open new avenues for understanding wave phenomena.
• The results are significant for the design of advanced non-Hermitian optical devices and systems.