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Analytical Chemistry Mar 19, 2020

Unraveling optical parameters: New method to optimize plasmon enhanced spectroscopy

Plasmon enhanced spectroscopy allows scientists to reach single molecule sensitivity and a lateral resolution even down to sub-molecular resolution. A major challenge for it to become a user-friendly analytical tool however ...

Optics & Photonics Mar 13, 2020

Silicon-graphene hybrid plasmonic waveguide photodetectors beyond 1.55 μm

Silicon photonics are known as a key technology for modern optical communications at the near infrared wavelength-band, i.e., 1.31/1.55 μm. Currently silicon photonics researchers have attempted to extend the technology ...

Optics & Photonics Mar 11, 2020

MEMS technology for fabricating plasmonic near-infrared spectrometers

Near-infrared spectroscopy provides absorption spectrum unique to substances so that discrimination of gas species becomes possible. Miniaturization of spectrometers is thus required to realize compact gas sensors for monitoring ...

Nanomaterials Mar 31, 2020

Mystery solved: The origin of the colors in the first color photographs

A palette of colors on a silver plate: That is what the world's first color photograph looks like. It was taken by French physicist Edmond Becquerel in 1848. His process was empirical, never explained, and quickly abandoned. ...

Optics & Photonics Mar 25, 2020

Researchers propose a novel methodology for the characterization of light-matter interaction at atomic size

Photonic cavities are an essential part of many modern optical devices, from laser pointers to microwave ovens. Just as we can store water in a tank and create standing waves on the surface of the water, we can confine light ...

Optics & Photonics Mar 26, 2020

A new approach to achieving stable, high-repetition-rate laser pulses

High-repetition-rate pulsed lasers serve a wide range of applications, from optical communications to microwave photonics and beyond. Generating trains of ultrashort optical pulses commonly involves locking phases of longitudinal ...

Optics & Photonics Mar 27, 2020

Scientists find a way to extract color from black

Scientists have developed a way of extracting a richer palette of colours from the available spectrum by harnessing disordered patterns inspired by nature that would typically be seen as black.

General Physics Mar 23, 2020

Flat-panel technology could transform antennas, wireless and cell phone communications

Researchers at Los Alamos National Laboratory are reinventing the mirror, at least for microwaves, potentially replacing the familiar 3-D dishes and microwave horns we see on rooftops and cell towers with flat panels that ...

Analytical Chemistry Mar 23, 2020

A milestone in ultrafast gel fabrication from unconventional self-healing noble metal gels

Electrocatalysis is extensively involved in many important energy-related processes such as the oxygen reduction reaction (ORR) for fuel cells, the hydrogen evolution reaction (HER) for green hydrogen production, and the ...

Optics & Photonics Mar 19, 2020

A nanoscale laser made of gold and zinc oxide

Tiny particles composed of metals and semiconductors could serve as light sources in components of future optical computers, as they are able to precisely localize and extremely amplify incident laser light. A team from Germany ...

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