Enhancement and suppression of terahertz emission by a Fabry-Perot cavity structure with a nonlinear optical crystal.
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.
Shirai
Hideto
H
Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Japan.
Kishimoto
Eiji
E
Kokuhata
Tatsuya
T
Miyagawa
Hayato
H
Koshiba
Shyun
S
Nakanishi
Shunsuke
S
Itoh
Hiroshi
H
Hangyo
Masanori
M
Kim
Tae Geun
TG
Tsurumachi
Noriaki
N