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Physicists have learned to change the wavelength of Tamm plasmons

Researchers from Siberian Federal University and L. V. Kirensky Institute of Physics predicted the structure to control Tamm plasmon wavelength using external fields or heating. They achieved a hybrid Tamm plasmon by incorporating a liquid crystal layer in a multilayer mirror, enabling color change through heating or electrification.

SourceSiberian Federal University·JournalJournal of the Optical Society of America B·DateJan 24, 2018

Transportable laser

PTB physicists have developed a frequency-doubling unit that can endure transportation and maintain accuracy. The unit is based on a highly stable monolithic enhancement cavity for second harmonic generation, enabling reliable laser light for quantum-optical experiments.

SourcePhysikalisch-Technische Bundesanstalt (PTB)·JournalReview of Scientific Instruments·DateJan 22, 2018

Science's 2017 Breakthrough of the Year: The observation of two neutron stars merging

The observation of two neutron stars merging generated tiny ripples in spacetime called gravitational waves, detected by LIGO detectors on Earth. This event also triggered an explosion studied by hundreds of astronomers worldwide, marking a major breakthrough in astrophysics and offering new tools for observing the universe.

Nanoscale super-resonator extends light lifetime

Researchers create a subwavelength dielectric resonator that can trap light for an extended period due to destructive interference, allowing for more efficient optical devices. The structure is capable of suppressing energy leakage and keeping light for ten times longer than conventional resonators.

SourceITMO University·JournalPhysical Review Letters·DateDec 18, 2017

Two holograms in one surface

A team of researchers at Caltech has developed a way to encode multiple holographic images in a single surface using carefully engineered silicon oxide and aluminum surfaces. The technology works by reflecting light differently depending on the angle of incoming light, allowing for high-quality images with no loss of resolution.

SourceCalifornia Institute of Technology·JournalPhysical Review X·DateDec 11, 2017

Hot bodies are attractive

Researchers at UC Berkeley found that blackbody radiation from a warm object can attract cesium atoms, with an effect 20 times stronger than gravity. This discovery has implications for precise measurements of fundamental constants and tests of general relativity.

SourceUniversity of California - Berkeley·JournalNature Physics·DateDec 8, 2017

Controlling spin for memory storage

Researchers at Tohoku University have developed a computational simulation that shows the potential of ultrafast laser pulses to switch electrons' spins in magnetic materials, enabling faster magnetic memory devices. The study suggests perovskite manganites and layered manganites as possible materials for testing their model.

SourceTohoku University·JournalPhysical Review Letters·DateDec 5, 2017

A step forward for quantum computing

A team of physicists from Harvard University has developed a special type of quantum computer, known as a quantum simulator, which is programmed by capturing super-cooled rubidium atoms with lasers. The system could shed new light on material properties and complex optimization problems.

SourceHarvard University·JournalNature·DateNov 29, 2017

Nano-watch has steady hands

Scientists at the University of Vienna have developed an incredibly stable nanoscale clock that can maintain its accuracy for extremely long periods. The clock, which consists of a levitated silicon cylinder, has a precision of one millionth of a second over four days.

SourceUniversity of Vienna·JournalNature Communications·DateNov 21, 2017

Borophene shines alone as 2-D plasmonic material

Researchers at Rice University have discovered that borophene, a two-dimensional boron material, can emit visible and near-infrared light by activating its plasmons. This property makes it a promising candidate for plasmonic and photonic devices such as biomolecule sensors, waveguides, nanoscale light harvesters, and nanoantennas.

SourceRice University·JournalJournal of the American Chemical Society·DateNov 20, 2017

Rice U. study: Vibrating nanoparticles interact

Rice University researchers have found that placing gold nanodisks into groups can selectively alter their vibrational frequencies, a discovery that could lead to new ways of converting light energy into mechanical energy. The study's findings show promise for applications in secure communications, sensing, and other fields.

SourceRice University·JournalProceedings of the National Academy of Sciences·DateOct 16, 2017