Approaches to High Performance Terahertz-Waves Emitting Devices Utilizing Single Crystals of High Temperature Superconductor Bi2Sr2CaCu2O8+δ. - Takanari Kashiwagi; Genki Kuwano; Shungo Nakagawa; Mayu Nakayama; Jeonghyuk Kim; Kanae Nagayama; Takuya Yuhara; Takuya Yamaguchi; Yuma Saito; Shohei Suzuki; Shotaro Yamada; Ryuta Kikuchi; et al. (IEICE Trans. Electron., 2023)