Title :
Optical beam profiles of terahertz quantum cascade lasers with a metal-metal waveguide
Author :
Klaassen, T.O. ; Adam, A.J.L. ; Hovenier, N. ; Kasalynas, I. ; Gao, J.R. ; Williams, B.S. ; Kumar, S. ; Hu, Q. ; Orlova, E.E. ; Reno, J.L.
Author_Institution :
Kavli Inst. of NanoScience, Delft Univ. of Technol., Netherlands
Abstract :
Quantum cascade lasers operating in the THz region are of great potential interest as local oscillators for THz heterodyne detection, and more general, as sources for imaging purposes. To assess the applicability of this new source beam profile, measurements on ´metal-metal´ cavity QCL´s have been performed. Contrary to earlier waveguide based simulations, the beam patterns show strong angular intensity oscillations, depending on the length of the laser cavity and the emission wavelength. The experimental results have been compared with a simple theoretical model.
Keywords :
heterodyne detection; laser beams; laser cavity resonators; quantum cascade lasers; submillimetre wave lasers; THz heterodyne detection; angular intensity oscillation; beam patterns; emission wavelength; laser cavity; metal-metal cavity QCL; metal-metal waveguides; optical beam profile; source beam profile; terahertz quantum cascade lasers; Laser beams; Laser modes; Laser theory; Local oscillators; Optical beams; Optical imaging; Optical waveguides; Performance evaluation; Quantum cascade lasers; Wavelength measurement;
Conference_Titel :
Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on
Print_ISBN :
0-7803-9348-1
DOI :
10.1109/ICIMW.2005.1572453
