A large enhancement (up to 0.40 pm V−1)
of the second-order optical susceptibility was observed in CdI2–Cu
single-layered nanocrystals for the Nd:YAG fundamental laser beam λ = 1.06 µm.
The Cu impurity content and nanolayer thickness of the cleaved layers (about
several nanometres) play a crucial role in the observed effect. The temperature
dependence of the optical second-harmonic generation (SHG) together with its
correlation with Raman spectra of low-frequency modes indicate a key
role for the UV-induced anharmonic electron–phonon interactions in the
observed effect. The maximal output UV-induced SHG was achieved for a
Cu content of about 0.5% and at liquid helium temperatures.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.