Two-photon emission is a relatively weak emission process, about five orders of magnitude weaker than the usual single-photon emission that occurs in semiconductor lasers or LEDs. So we had to use ...

The emission of single photons from atomically thin nanoribbons marks a breakthrough in quantum materials, paving the way for secure communication technologies.

Scientists successfully used 13,000 nuclear spins in a gallium arsenide (GaAs) quantum dot system to create a scalable ...

In an advance for quantum technologies, researchers at the Cavendish Laboratory, University of Cambridge, have created a ...

As a result, rather than emitting a photon, a defect might instead cause the atoms to vibrate, reducing the light-emission efficiency. Chris G. Van de Walle, Herbert Kroemer Professor, Materials ...

In a groundbreaking achievement for quantum technologies, researchers have created a functional quantum register using the atoms inside a semiconductor quantum dot.

Controlled generation of single-photon emitters in silicon (red) by broad-beam implantation of ions (blue) through a lithographically defined mask (left) and by a scanned focused ion beam (right).

This means that each electron transition will produce a photon of a different frequency and hence a different colour. This causes line emission spectra to be produced, as shown below. This is not ...

Procedures such as X-rays; computed tomography (CT); magnetic resonance imaging (MRI); positron emission tomography (PET) and single-photon emission computed tomography (SPECT) are important in ...

Our research is focused on the development of new molecular imaging tools and radiopharmaceuticals for positron emission tomography (PET) and single-photon emission computed tomography (SPECT) imaging ...

This work reports the design of an efficient multiband UC system based on Ln3+/Yb3+-doped core-shell upconversion ...