Injection-seeded terahertz-wave parametric generator with wide tunability

Abstract
We report on the development of a widely tunable (frequency: 0.7–2.4 THz and wavelength: 125–430 μm), injection-seeded THz-wave parametric generator (IS-TPG), which operates at room temperature. The spectral resolution (200 mW) of the output wave and the small beam divergence are suited to a variety of applications.