[14p-211-1~17] 3.9 Terahertz technologies

[14p-211-5] Room-temperature Continuous-Wave Operation of 2.8 THz Quantum-Cascade Laser Sources based on Difference Frequency Generation

〇Kazuue Fujita¹, Akio Ito¹, Masahiro Hitaka¹, Tadataka Edamura¹ (1.Hamamatsu Photonics)

Keywords:quantum cascade laser, terahertz, difference frequency generation

Recently, terahertz sources based on intracavity difference-frequency generation (DFG) in dual-wavelength mid-infrared quantum cascade lasers (QCLs) have been demonstrated. In this talk, we demonstrate room temperature continuous-wave operation of a 2.8 THz QCL source based on intra-cavity DFG, in which a very low threshold current density of 1.2 kA/cm² has been obtained.