Terahertz source-on-a-chip with decade-long stability using layered superconductor elliptical microcavities. - Mingqi Zhang; Shungo Nakagawa; Yuki Enomoto; Yoshihiko Kuzumi; Ryuta Kikuchi; Yuki Yamauchi; Toshiaki Hattori; Richard A. Klemm; Kazuo Kadowaki; Takanari Kashiwagi; Kaveh Delfanazari (CoRR, 2025)