Nonlinear waves in physical systems are wave phenomena governed by equations in which the restoring forces or constitutive relations depend nonlinearly on the field amplitudes, leading to amplitude-dependent propagation characteristics and interactions. Unlike linear waves, they can exhibit self-steepening, shock formation, soliton generation, modulational instability, and harmonic generation. Mathematically, they arise from nonlinear partial differential equations such as the Korteweg–de Vries, nonlinear Schrödinger, sine-Gordon, and nonlinear elastic or hydrodynamic equations. Nonlinear waves play a central role in fluid dynamics, plasma physics, nonlinear optics, condensed matter, and elastic media, where they mediate energy transport, pattern formation, and coherent structure dynamics.
Acoustic frequency combs organize sound or mechanical vibrations into a series of evenly spaced frequencies, much like the teeth on a comb. They are the acoustic counterparts of optical frequency combs, which consist of equally ...
Optics & Photonics
Feb 20, 2026
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The invention of tiny devices capable of precisely controlling the direction and behavior of light is essential to the development of advanced technologies. Researchers at the Advanced Science Research Center at the CUNY ...
Optics & Photonics
Feb 3, 2026
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124
For the first time, physicists have generated and observed stable bright matter-wave solitons with attractive interactions within a grid of laser light.
For the first time, physicists in Italy have created a 'lump soliton': an extremely stable packet of light waves which can travel through 3D space, and even interact with other solitons without losing its shape.
Nonlinear optical dynamics—intensity-dependent response of light upon interaction with materials under high-intensity light sources—are of huge significance in modern photonics, finding applications in fields ranging from ...
Optics & Photonics
Oct 31, 2025
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45
University of Queensland researchers have created a microscopic "ocean" on a silicon chip to miniaturize the study of wave dynamics. The device, made at UQ's School of Mathematics and Physics, uses a layer of superfluid helium ...
Soft Matter
Oct 23, 2025
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128
Solitonic waves—waves that keep their shape and direction of motion for a long time—have intrigued physicists for almost two centuries. In real-world circumstances, these waves eventually die out due to energy loss. A team ...
Condensed Matter
Aug 19, 2025
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171
A research team in Korea has experimentally demonstrated, for the first time in the world, a nonlinear wave phenomenon that changes its frequency—either rising or falling—depending on which direction the waves come from.
General Physics
Jul 25, 2025
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52
By breaking a decades-old paradigm and rethinking the role that the dimension of time plays in physics, researchers from the University of Rostock and the University of Birmingham have discovered novel flashes of light that ...
General Physics
Apr 23, 2025
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Rapidly increasing data traffic is placing ever greater demands on the capacity of communication systems. In an article titled "Ultra-broadband optical amplification using nonlinear integrated waveguides" published in Nature, ...
Optics & Photonics
Apr 9, 2025
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