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Condensed Matter Mar 16, 2023

Study uncovers the fundamental mechanisms underlying the formation of polarons in 2D atomic crystals

Polarons are localized quasiparticles that result from the interaction between fermionic particles and bosonic fields. Specifically, polarons are formed when individual electrons in crystals distort their surrounding atomic ...

Condensed Matter Mar 8, 2023

Viable superconducting material created at low temperature and low pressure (Retracted paper)

In a historic achievement, University of Rochester researchers have created a superconducting material at both a temperature and pressure low enough for practical applications.

Condensed Matter Mar 7, 2023

Coherent phonon-induced gigahertz optical birefringence realized in strontium titanate

Using ultrafast time-resolved pump detection technology, researchers led by Prof. Sheng Zhigao from the Hefei Institutes of Physical Science (HFIPS) of the Chinese Academy of Sciences have realized the gigahertz (GHz) frequency ...

Optics & Photonics Mar 6, 2023

Researchers achieve nonreciprocal frequency conversion with optical and mechanical modes

Recently, a research team led by Prof. Guo Guangcan from the University of Science and Technology of China (USTC) demonstrated nonreciprocal routing between any two modes with different frequencies through radiation pressure ...

General Physics Feb 28, 2023

Observing phononic skyrmions based on the hybrid spin of elastic waves

Skyrmions are extremely small with diameters in the nanoscale, and they behave as particles suited for information storage and logic technologies. In 1961, Tony Skyrme formulated a manifestation of the first topological defect ...

General Physics Feb 23, 2023

Neutrons reveal key to extraordinary heat transport

Warming a crystal of the mineral fresnoite, Oak Ridge National Laboratory scientists discovered that excitations called phasons carried heat three times farther and faster than phonons, the excitations that usually carry ...

Optics & Photonics Feb 23, 2023

Writing on glass and silica indicates novel direction for chiral optical property tailoring

From fundamental physics of light-matter interaction to fabrication of targeted optical properties in highly complex optical engineering, the femtosecond (fs) laser plays a crucial role in laser manufacturing. Ultrashort ...

Optics & Photonics Feb 17, 2023

Tapered optical fiber addresses challenge posed by Brillouin scattering

When optical beams, consisting of photons, travel through fibers, they cause vibrations that generate acoustic waves, consisting of phonons. The phenomenon, called Brillouin scattering, has been harnessed by researchers to ...

Condensed Matter Feb 13, 2023

Chiral phonons create spin current without needing magnetic materials

Researchers from North Carolina State University and the University of North Carolina at Chapel Hill used chiral phonons to convert wasted heat into spin information—without needing magnetic materials. The finding could lead ...

General Physics Feb 9, 2023

On-chip mechanical exceptional points based on an optomechanical zipper cavity

Exceptional points are a distinct type of spectral singularity in non-Hermitian systems and their intriguing physics are in study with optical exceptional points. Exceptional points are singularities in the energy functions ...

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