THE SPARROW SINGLE-PHOTON CHIP
The Sparrow Single Photon Chip is a patented technology for deterministically generating single photons. It is based on ultra-precise InAs quantum dot structures, which when excited by an external laser will produce indistinguishable single photons on demand. The emitted photons are collected by a nanophotonic waveguide with near-unity efficiency (ß >95%). The on-demand photon stream is subsequently directed to an out-coupling grating that emits the photons vertically off the chip. To obtain high purity and coherence of the single-photon, the chip must be cooled down to below ~6° K.
For optimal performance the chip should be driven by resonant excitation where the pulsed excitation laser is tuned to the transition frequency of the quantum dot and electrical contacts stabilize the quantum dot transition. The chip offers world-leading specifications in delivering strings of hundreds of indistinguishable (>96%) single photons on demand.
For optimal performance the chip should be driven by resonant excitation where the pulsed excitation laser is tuned to the transition frequency of the quantum dot and electrical contacts stabilize the quantum dot transition. The chip offers world-leading specifications in delivering strings of hundreds of indistinguishable (>96%) single photons on demand.
HERE’S HOW IT WORKS
HERE’S HOW IT WORKS
Shoot a laser pulse at our SQT quantum-dot chip and it will deliver a stream of single photons. An optical cryostat equipped for confocal spectroscopy is required, but use is simple and straightforward.
The standard SQT-chip with gratings for vertical out-coupling
