Observation of Biexciton-Resonant Hyper-Parametric Scattering in SiO2/CuCl Layered Structures
Masaaki Nakayama, Takashi Nishioka, Shuji Wakaiki +4 more
We have prepared SiO 2 /CuCl layered structures and investigated the structural and optical properties, focusing on the observation of biexciton-resonant hyper-parametric scattering that is a promising process to generate entangled photons. A crystalline CuCl film, which is the active layer, was grown on an Al 2 O 3 substrate by a vacuum deposition method, and then an amorphous SiO 2 film as the passivation layer for hygroscopic CuCl was prepared by an rf-magnetron sputtering method. X-ray diffraction patterns and optical spectra of excitons indicate that the growth of the SiO 2 -passivation layer does not degrade the crystallinity of the underlying CuCl thin film. It has been demonstrated that the biexciton-resonant hyper-parametric scattering is clearly observable in the SiO 2 /CuCl layered structure.
Japanese Journal of Applied Physics•Mar 1, 2007•6 citations