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Potential Due to a Polarized Object

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A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...

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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Polarization Faticons: Chiral Localized Structures in Self-Defocusing Kerr Resonators.

Erwan Lucas¹, Gang Xu², Pengxiang Wang²

¹Université Bourgogne Europe, Laboratoire Interdisciplinaire Carnot de Bourgogne ICB UMR 6303, CNRS, F-21000 Dijon, France.

Physical Review Letters

|August 27, 2025

Summary

This summary is machine-generated.

Researchers discovered novel "polarization faticons," unique temporal localized structures in nonlinear optical resonators. These chiral dissipative solitons break symmetry and offer new insights into complex light-matter interactions.

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Area of Science:

Nonlinear optics
Photonics
Complex systems

Background:

Driven nonlinear optical resonators can exhibit complex dynamics.
Dissipative solitons are localized structures in open systems far from equilibrium.
Multicomponent systems often display rich emergent phenomena.

Purpose of the Study:

To investigate novel temporal localized dissipative structures in nonlinear optical resonators.
To characterize the properties and formation mechanisms of these new structures.
To explore their potential applications, such as frequency comb generation.

Main Methods:

Numerical predictions of structure formation.
Experimental observations in a driven nonlinear optical resonator.
Analysis of symmetry breaking and excitation dynamics.

Main Results:

Observation of polarization faticons, a novel type of chiral dissipative soliton.
Demonstration that faticons break temporal and polarization symmetry.
Identification of a link between faticons and vectorial modulational instability, excited via collapsing dynamics.

Conclusions:

Polarization faticons represent a new class of vectorial localized dissipative structures.
These structures offer potential for frequency comb generation in specific resonator types.
The findings provide fundamental insights into multicomponent dissipative systems.