Geometrical resonance conditions for THz radiation from the intrinsic Josephson junctions in Bi(2)Sr(2)CaCu(2)O(8+δ).
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.
Tsujimoto
Manabu
M
Institute of Materials Science, Graduate School of Pure & Applied Sciences, University of Tsukuba,1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
Yamaki
Kazuhiro
K
Deguchi
Kota
K
Yamamoto
Takashi
T
Kashiwagi
Takanari
T
Minami
Hidetoshi
H
Tachiki
Masashi
M
Kadowaki
Kazuo
K
Klemm
Richard A
RA