title: Broadband THz-wave generation by satisfying the noncollinear phase-matching condition with a reflected signal beam.
abstract: We demonstrated broadband terahertz (THz) wave generation by satisfying the noncollinear phase-matching condition with a reflected signal beam. We constructed a dual-wavelength optical parametric oscillator with two potassium titanium oxide phosphate crystals pumped by a frequency-doubled Nd:YAG laser. The collinear pump and signal waves were irradiated into a lithium niobate crystal. The pump and the signal waves were reflected at the crystal surface. Because the pump and the signal waves have a finite beam diameter, when the reflected signal wave and unreflected pump wave were irradiated at the correct angle, the noncollinear phase-matching condition was satisfied. By changing the incident angle to the crystal, broadband THz-wave generation with a range of over 0.2-7.2 THz was achieved.
authors: Takuya
authors: T
authors: Akiba
authors: Yasuhiro
authors: Y
authors: Akimoto
authors: Motoaki
authors: M
authors: Tamura
authors: Koji
authors: K
authors: Suizu
authors: Katsuhiko
authors: K
authors: Miyamoto
authors: Takashige
authors: T
authors: Omatsu
authors: Jun
authors: J
authors: Takayanagi
authors: Tomoya
authors: T
authors: Takada
authors: Kodo
authors: K
authors: Kawase