Title :
How to manipulate the frequency of a Terahertz Quantum Cascade Laser
Author :
Klaassen, T.O. ; Hovenier, J.N. ; Adam, A.J.L. ; Baryshev, A. ; Gao, J.R. ; Klapwijk, T.M. ; Hu, Q. ; Williams, B.S. ; Kumar, S. ; Reno, J.L.
Author_Institution :
Kavli Inst. of Nanosci., Delft Univ. of Technol., Delft
Abstract :
We investigate techniques to manipulate the frequency of Terahertz Quantum Cascade Lasers (THz QCL). Frequency tuning by changing the heatsink temperature or the QCL drive current, or by illumination of the QCL with bandgap light. Creation of frequency sidebands through amplitude modulation of the drive current or the bandgap light. We report the observation of strong difference frequency generation in a two-colour THz QCL and discuss the possibility to use this resonant non-linear effect to create (tunable) sidebands by mixing the radiation from an external (tunable) microwave source with the THz field inside the QCL cavity.
Keywords :
amplitude modulation; laser frequency stability; quantum cascade lasers; submillimetre wave lasers; amplitude modulation; bandgap light; frequency generation; frequency tuning; heatsink temperature; resonant nonlinear effect; terahertz quantum cascade laser; Amplitude modulation; Frequency; Laser tuning; Lighting; Microwave generation; Photonic band gap; Quantum cascade lasers; Resonance; Temperature; Tunable circuits and devices;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516808
