Cherenkov-phase-matched nonlinear optical detection and generation of terahertz radiation via GaAs with metal-coating.
Terahertz (THz) wave detection and emission via Cherenkov-phase-matched nonlinear optical effects at 1.55-μm optical wavelength were demonstrated using a GaAs with metal-coating (M-G-M) and bare GaAs as a reference sample in conjunction with a metallic tapered parallel-plate waveguide (TPPWG). The metal-coated GaAs is superior to the bare wafer both as a THz electro-optic detector and as an emitter. Significant improvements in the detection and emission efficiency were obtained by utilizing a metal-coating due to better confinement and lower loss of the THz waves propagating in the M-G-M compared with bare GaAs.
Ramon Delos
RD
Santos
Shinpei
S
Ozawa
Valynn
V
Mag-Usara
Syougo
S
Azuma
Anthony
A
Tuico
Vernalyn
V
Copa
Arnel
A
Salvador
Kohji
K
Yamamoto
Armando
A
Somintac
Kazuyoshi
K
Kurihara
Hideaki
H
Kitahara
Masahiko
M
Tani
Elmer
E
Estacio