The SpooQy Lab

Towards satellite tests combining general relativity and quantum mechanics through quantum optical interferometry: progress on the deep space quantum link. Written with an international consortium, published in EPJ Quantum Technology. 

Boosting classical and quantum nonlinear processes in ultrathin van der Waals materials. How thin can we make nonlinear materials for quantum light emission? In collaboration with Gao Weibo, and published in Nature Communications.

Polarization QKD with room temperature single photon emitters that are compatible with the telecom wavelengths has been published in National Science Review.  See also arXiv: https://arxiv.org/abs/2409.17060. PhD student Zhang Xingjian is the lead author.

SpooQy-1 continues to contribute to science. In this paper with UK-based collaborators we report on the observation of radiation damage for the single photon detectors on the satellite, and developed a model that predicted the radiation damage observed. This can be very useful for future space missions. See the results in Nature Communication Physics 8, 118 (2025).  

A simple way to produce photon pairs in the telecom and visible regime is reported by PhD student Chin Jia Boon and MSc student Diane Prato. This employs non-critical phase-matching, and was an accidental discovery when a batch of quasi-phase matched crystals failed to perfom to specifications! See: http://arxiv.org/abs/2502.18752 . 

SpooK#5, Wu Shuin Jian, is the lead author on a recent publication in Scientific Reports that quantifies the impact of repeated annealing on single photon detectors, in order to correct for in-orbit radiation damage. This will inform future quantum technology missions that wish to correct for radiation damage. See: Sci Rep 14, 23331 (2024).

Entanglement distribution over 155 km of metropolitan fiber using a nanophotonic Si chip is reported on the arXiv: https://arxiv.org/abs/2409.17558. PhD student Du Jinyi is the lead author.