Ocean waves grow way beyond known limits, new research finds
Scientists have discovered that ocean waves may become far more extreme and complex than previously imagined.
General Physics
Sep 18, 2024
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Page 4: Research news on Nonlinear waves
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.
Scientists demonstrate octave-spanning soliton frequency combs on thin-film lithium niobate
The invention of optical frequency combs revolutionized frequency metrology and time-keeping. Miniaturization of such combs onto photonic chips, primarily leveraging the microresonator Kerr soliton frequency comb, expands ...
Optics & Photonics
Sep 4, 2024
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Scientists demonstrate giant THz Kerr effect via stimulated phonon polaritons
Terahertz (THz) waves and THz technologies have gradually opened a new style for communications, cloud-based storage/computing, information contest, and medical tools. With the advancement of THz technologies, studies on ...
Optics & Photonics
Sep 2, 2024
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Study reveals soliton solutions in Maxwell-Bloch systems
Dr. Asela Abeya, of SUNY Poly faculty in the Department of Mathematics and Physics, has collaborated with peers at the University at Buffalo and Rensselaer Polytechnic Institute on a research paper titled "On Maxwell-Bloch ...
General Physics
Aug 1, 2024
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Enhancement and manipulation of second- and third-harmonic generation based on all-dielectric nonlinear metasurfaces
Nonlinear optics is a branch of optics that deals with the complex nonlinear relationships between the optical response of the medium and the incident light when it interacts with the optical medium. Currently, nonlinear ...
Optics & Photonics
Jun 14, 2024
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Team reports on ultrafast laser state active controlling based on anisotropic quasi-1D material
Tunable ultrafast lasers with adjustable parameters, such as wavelength, intensity, pulse width and laser states are desirable as next-generation intelligent light sources. Due to complex nonlinear effects within the ultrafast ...
Optics & Photonics
Apr 10, 2024
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An endless domino effect: Non-reciprocal topological solitons in active metamaterials
Topological solitons can be found in many places and at many different length scales. For example, they take the form of kinks in coiled telephone cords and large molecules such as proteins. At a very different scale, a black ...
General Physics
Mar 20, 2024
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When dissipative solitons vanish, breathing dynamics occur: Study
Solitons are quasiparticles that propagate along a non-dissipative wave. Put another way, they are waveforms that hold their shape as they move—like a single wave moving across the surface of a pond. They can also show particle-like ...
Optics & Photonics
Jan 31, 2024
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Breaking through the limits of a single fiber laser amplifier: Coherent beam combination
High-power, high-energy ultrafast fiber lasers are indispensable tools in various fields, from basic and applied science research to industrial processing. However, due to thermal effects, nonlinear effects, there is always ...
Optics & Photonics
Jan 23, 2024
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Using 'Kerr solitons' to boost the power of transmission electron microscopes
When light goes through a material, it often behaves in unpredictable ways. This phenomenon is the subject of an entire field of study called "nonlinear optics," which is now integral to technological and scientific advances ...
Optics & Photonics
Jan 11, 2024
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