Sentences with phrase «single photons emitted»

«What makes tungsten diselenide extremely versatile is that the color of the single photons emitted by the quantum dots is correlated with the quantum dot spin,» said first author Chitraleema Chakraborty.

In the same way large antennas on rooftops direct emission of classical radio waves for cellular and satellite transmissions, the nano - antenna efficiently directed the single photons emitted from the nanocrystals into a well - defined direction in space.

Not exact matches

Electrical current is injected into the device, tunnelling from single - layer graphene, through few - layer boron nitride acting as a tunnel barrier, and into the mono - or bi-layer TMD material, such as tungsten diselenide (WSe2), where electrons recombine with holes to emit single photons.

Experimental results show that almost 40 % of the photons are easily collected with a very simple optical apparatus, and over 20 % of the photons are emitted into a very low numerical aperture, a 20-fold improvement over a freestanding quantum dot, and with a probability of more than 70 % for a single photon emission.

But since information for quantum communication based on photonics is encoded in a single photon, it is necessary to emit and send them one at a time.

Illuminating the quantum dot with laser light excites an electron, which can then jump from one orbit to another and thereby emit a single photon at a time.

They allow researchers to prove that single - photon sources, another key element of many optical quantum information systems, reliably emit only one photon at a time.

The scientists describe in today's issue of Science a mushroom - shaped microdisk, combined with a quantum dot, capable of emitting single photons (see image).

The device then channels these photons in a single direction around the grid to until they are emitted as a beam.

When the device was switched on, electrons flowed single - file through each double quantum dot, causing them to emit photons in the microwave region of the spectrum.

The three volunteers sat through a total of more than 2,400 trials in which a single photon was emitted (and many more in which it was not).

«By chemically modifying the nanotube surface to controllably introduce light - emitting defects, we have developed carbon nanotubes as a single photon source, working toward implementing defect - state quantum emitters operating at room temperature and demonstrating their function in technologically useful wavelengths,» said Stephen Doorn, leader of the project at Los Alamos and a member of the Center for Integrated Nanotechnologies (CINT).

«By chemically modifying the nanotube surface to controllably introduce light - emitting defects, we have developed carbon nanotubes as a single photon source, working toward implementing defect - state quantum emitters operating at room temperature and demonstrating their function in technologically useful wavelengths,» said Stephen Doorn.

High spontaneous emission quantum efficiency, is important for photon number squeezed light, diode lasers, single ‐ mode light ‐ emitting ‐ diodes, optical interconnects, and solar cells.»