title: Enhancement and suppression of terahertz emission by a Fabry-Perot cavity structure with a nonlinear optical crystal.
abstract: We have fabricated Fabry-Perot (FP) cavities in the THz region with a ZnTe crystal as a cavity layer by a simple stacking method. We observed more than a three times enhancement of the THz emission intensity in the FP cavities compared with the bare ZnTe crystal at the frequencies of the resonant modes and stopband edges. On the other hand, suppression of the THz emission occurs at frequencies in the stopband. The enhancement and suppression of the THz emission are caused by the modification of the optical density of state in the FP cavities compared to the vacuum.
authors.affiliation: Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Japan.
authors.forename: Hideto
authors.initials: H
authors.lastname: Shirai
authors.forename: Eiji
authors.initials: E
authors.lastname: Kishimoto
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Kokuhata
authors.forename: Hayato
authors.initials: H
authors.lastname: Miyagawa
authors.forename: Shyun
authors.initials: S
authors.lastname: Koshiba
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Nakanishi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Itoh
authors.forename: Masanori
authors.initials: M
authors.lastname: Hangyo
authors.forename: Tae Geun
authors.initials: TG
authors.lastname: Kim
authors.forename: Noriaki
authors.initials: N
authors.lastname: Tsurumachi