New materials, techniques, and theory (1)

[LSC6-04(Invited)] Band structure modification through high pressure application for tunable luminescence in fluoride crystals

*Marilou Cadatal Raduban^1,2, Luong Viet Mui³, Masahiro Yamashita², Yuki Shibazaki⁴, Nobuhiko Sarukura^2,5, Kohei Yamanoi² (1. Centre for Theoretical Chemistry and Physics, Massey University, 2. Institute of Laser Engineering, Osaka University, 3. Graduate School of Engineering, Osaka University, 4. Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 5. New Industry Creation Hatchery Center (NICHe), Tohoku University)

Fast decay emission from cross-luminescence (CL) in wide band gap fluoride crystals are in the vacuum ultraviolet (VUV) wavelength region. The ability to shift VUV luminescence to UV will enable easier detection of the fast emission. Uniform volume compression through hydrostatic high-pressure applications decreases the energy gap between the valence and core bands of KMgF and BaF crystals, potentially shifting their CL emission from 200nm (VUV) to 300nm (UV).