This Little Light of Mine: Changing the Color of Single Photons Emitted by Quantum Dots (IMAGE)

National Institute of Standards and Technology (NIST)

This Little Light of Mine: Changing the Color of Single Photons Emitted by Quantum Dots

Caption

In new NIST experiments, the "color" (wavelength) of photons from a quantum dot single photon source (QD SPS) is changed to a more convenient shade using an up-conversion crystal and pump laser. To test that the process truly acts on single photons without degrading the signal (by creating additional photons), the output is split in two and sent to parallel detectors -- true single photons should not be detected simultaneously in both paths.

Credit

NIST

Usage Restrictions

None

License

Licensed content

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.