[20p-P07-1~49] 1 Interdisciplinary Physics and Related Areas of Science and Technology (Poster)

[20p-P07-40] Evaluation of photoluminescence from heavily Cr doped Al₂O₃ crystal

〇Ami Hitomi¹, Toru Katsumata^1,2, Hiroaki Aizawa¹ (1.Toyo Univ., 2.Toyo Inst.)

Keywords:

Ruby,Photoluminescence,Fluorescence Thermometer

Cr doped Al₂O₃ crystal (ruby) emits red photoluminescence (PL) when excited by red, blue, green or ultraviolet light. This PL has been applied as fluorescent materials, fluorescence thermometers. Ruby with Cr concentration above 1.0 mol%, a wide peak thought to be caused by Cr³⁺ clusters can be seen in the near infrared region in addition to the sharp R line at around 694 nm.