Research on quantum optical application of novel polar widegap semiconductors

基于氮化物等宽禁带半导体材料的强二阶非线性光学特性和激子-光子相互作用，人们发展了实现新型量子光学相关光子对光源的基础技术，即通过光参量下转换和共振超参量散射过程实现量子光学相关光子对光源。特别是具有周期性极性反转结构的准相位匹配GaN波导高效紫色二次谐波产生的成功演示，证明了该材料体系在量子光学器件中的适用性。

Based on the strong second-order optical nonlinearity and the exciton-photon interaction in wide-gap semiconductors such as nitrides, fundamental technologies for realizing novel quantum optically correlated photon pair sources have been developed, which will be operated via optical parametric down conversion and resonant hyper parametric scattering processes. Especially the successful demonstration of the high-efficiency violet-colored second harmonic generation from a quasi-phase-matched GaN waveguide with a periodic-polarity-inverted structure attested the applicability of this material system to the quantum optical devices.