Physics

Articles from Science Daily Physics News

Method detects defects in 2D materials for future electronics, sensors

To further shrink electronic devices and to lower energy consumption, the semiconductor industry is interested in using 2D materials, but manufacturers need a quick and accurate method for detecting defects in these materials to determine if the material is suitable for device manufacture. Now a team of researchers has developed a technique to quickly and sensitively characterize defects in 2D materials.

How to take a picture of a light pulse

Until now, complex experimental equipment was required to measure the shape of a light pulse. Now, it can be done in a tiny crystal with the size of less than a milimeter. This can be used to study new materials or even even to reliably and quickly detect diseases by examining tiny blood samples.

Blue-emitting diode demonstrates limitations and promise of perovskite semiconductors

Halide perovskites have garnered attention because they're highly efficient at capturing energy in solar cells and efficient emitters in diodes. But researchers failed at making perovskite LEDs that emit blue light. Chemists succeeded, but X-ray studies of the LED's structure show that it's very sensitive to temperature, humidity and chemical environment. Hence environmental and chemical control is essential for stable operation. But these properties also allow for potentially broader use, such as sensors.

Quantum physics: On the way to quantum networks

Physicists have successfully demonstrated the transport of an entangled state between an atom and a photon via an optic fiber over a distance of up to 20 km -- thus setting a new record.

Quantum experiments explore power of light for communications, computing

Quantum researchers have conducted a series of experiments to gain a better understanding of quantum mechanics and pursue advances in quantum networking and quantum computing, which could lead to practical applications in cybersecurity and other areas.

Ghostly particles detected in condensates of light and matter

Discover 'ghostly' particles and quantum depletion. A new study makes the first observation of 'ghost particles' from Bose-Einstein condensates via 'quantum depletion': particles expelled by interaction-induced quantum fluctuations.

Mixing the unmixable: Novel approach for efficiently fusing different polymers

Cross-linked polymers are structures where large molecular chains are linked together, allowing exceptional mechanical properties and chemical resistance to the final product. However, their modification is not easy. Now, scientists develop a method that allows the fusion of different polymers together easily, allowing the precise tuning of the properties of the final material by selecting appropriate base polymers and mixing them at the right proportion.

New technique to study molecules and materials on quantum simulator discovered

A new technique to study the properties of molecules and materials on a quantum simulator has been discovered.

Record-breaking terahertz laser beam

Terahertz radiation is used for security checks at airports, for medical examinations and also for quality checks in industry. However, radiation in the terahertz range is extremely difficult to generate. Scientists have now succeeded in developing a terahertz radiation source that breaks several records: it is extremely efficient, and its spectrum is very broad -- it generates different wavelengths from the entire terahertz range. This opens up the possibility of creating short radiation pulses with extremely high radiation intensity.

Platelets instead of spheres make screens more economical

Scientists have further developed QLED technology for screens. They have produced light sources that for the first time emit high-intensity light in only one direction. This reduces scattering losses, which makes the technology extremely energy efficient.

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