**Quantum Computing Standard:** Frequency Upconversion of Single Photons
**Organizations Developing the Standard:** CNST (Center for Nanoscale Science and Technology) and ITL (Institute for Telecommunication Sciences)
**Current Status:** Implemented – Researchers from CNST and ITL have successfully demonstrated frequency upconversion of single photons from a semiconductor quantum dot.
**Potential Impact on Quantum Technologies:**
– This breakthrough enables “hybrid quantum systems” where light can be transmitted through optical fibers with low loss in one wavelength region, then interfaced with quantum memories operated in another.
– Improved near-infrared detector technology could make low-light level measurements easier by overcoming performance limitations in standard commercially available InGaAs avalanche photodiode devices.
The researchers used an on-demand 1300 nm single photon source developed at CNST, combined it with an upconversion single photon detector developed at ITL. They converted the 1300 nm photons to 710 nm using a nonlinear optical sum-frequency device. The higher sensitivity of silicon-based detectors allowed them to confirm that the converted light was still predominantly composed of single photons.
Source: https://www.nist.gov/itl/nature-photonics-reports-itlcnst-collaboration
Keywords: Single Photon, Quantum Dot, Near-Infrared
