title: Geometrical resonance conditions for THz radiation from the intrinsic Josephson junctions in Bi(2)Sr(2)CaCu(2)O(8+δ).
abstract: Subterahertz radiation emitted from a variety of short rectangular-, square-, and disk-shaped mesas of intrinsic Josephson junctions fabricated from a Bi(2)Sr(2)CaCu(2)O(8+δ) single crystal was studied from the observed I-V characteristics, far-infrared spectra, and spatial radiation patterns. In all cases, the radiation frequency satisfies the conditions both for the ac Josephson effect and for a mesa cavity resonance mode. The integer higher harmonics observed in all spectra imply that the ac Josephson effect plays the dominant role in the novel dual-source radiation mechanism.
authors.affiliation: Institute of Materials Science, Graduate School of Pure & Applied Sciences, University of Tsukuba,1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
authors.forename: Manabu
authors.initials: M
authors.lastname: Tsujimoto
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Yamaki
authors.forename: Kota
authors.initials: K
authors.lastname: Deguchi
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Takanari
authors.initials: T
authors.lastname: Kashiwagi
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Minami
authors.forename: Masashi
authors.initials: M
authors.lastname: Tachiki
authors.forename: Kazuo
authors.initials: K
authors.lastname: Kadowaki
authors.forename: Richard A
authors.initials: RA
authors.lastname: Klemm