Photonics is critical for building up the quantum networks, as photons are naturally good candidates for transfering information over long-distance. The thin-film lithium niobate can support current photonic quantum networking and computing, due to its application on single-photon source, frequency conversion, etc. Our group works on building up efficient single-photon source using periodically poled lithium niobate (PPLN) and interfacing with solid states emitters using frequency conversion.

Lithium niobate is also a good candidate for realizing large-scale photonic circuit for quantum computing. The low-loss, efficient, high-frequency modulation natrually fits the recent emerging frequency domain quantum computing. Our group are working on pushing the frequency-domain photonic quantum computing using the frequency shifter and beam splitters that our group developed. 

Spectral shearing of quantum light [Di Zhu, et al, arXiv 2112.09961 (2021)]: Using the high-performance electro-optic modulator on thin-film lithium niobate, we achieve record-high electro-optic frequency shearing of telecom single photons over terahertz range (± 641 GHz or ± 5.2 nm). We further demonstrate over eighteen-fold (6.55 nm to 0.35 nm) bandwidth suppression of single photons.