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HL: Fachverband Halbleiterphysik

HL 64: Poster II

HL 64.2: Poster

Donnerstag, 19. März 2020, 10:00–13:00, P1A

Continuous-wave room-temperature tunable THz-generating laser — •Ksenia Fedorova, Heyang Guoyu, Matthias Wichmann, Christian Kriso, Fan Zhang, Wolfgang Stolz, and Arash Rahimi-Iman — Faculty of Physics and Materials Sciences Center, Philipps-Universität Marburg, Renthof 5, D-35032 Marburg, Germany

High-performance, room-temperature, continuous-wave (CW), tunable terahertz (THz) lasers are desirable sources for THz applications ranging from THz spectroscopy and imaging to safety and security applications. So far, THz-generation at room temperature has been mostly targeted by direct quantum cascade lasers. An alternative to that has been provided by THz-generating semiconductor disk lasers (SDLs) based on intracavity frequency conversion in periodically-poled nonlinear crystals. They can allow the demonstration of efficient THz emission in the 0.8-to-2-THz spectral window based on difference-frequency generation. Several studies have so far demonstrated non-tunable THz output from such SDL-based devices with remarkable beam quality. Here, a room-temperature, CW, tunable THz-generating SDL is demonstrated. We employ a dual-wavelength SDL with an intracavity aperiodically-poled lithium niobate crystal for difference-frequency generation in the 0.8-to-1.1 THz spectral window.