Progress
Suzhou Laboratory Research Achievement Published in Prestigious Journal
Recently, Associate Researcher Xuan Fengyuan from the Frontier Materials Research Department of Suzhou Laboratory, in collaboration with Associate Professor Su Ying Quek from the National University of Singapore (NUS), developed a first-principles GW-BSE methodology to calculate quantum many-body effects in second-order electric susceptibility. This work overcomes the limitations of non-interacting approximations in conventional nonlinear optical property calculations, revealing the critical influence of electron-hole many-body interactions on nonlinear optoelectronic responses. The study further predicts the existence of biexciton resonance phenomena in two-dimensional materials, which could be utilized in designing next-generation entangled-state light sources.
Titled "Exciton-enhanced spontaneous parametric down-conversion in two-dimensional crystals," the research was published online in Physical Review Letters on June 14. This collaborative achievement between Suzhou Laboratory and NUS was supported by funding from Suzhou Laboratory’s preliminary research projects and other sources.
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