Recent advances of terahertz quantum cascade lasers

Manijeh Razeghi

doi:10.1117/12.899131

7 September 2011 Recent advances of terahertz quantum cascade lasers

Manijeh Razeghi

Proceedings Volume 8119, Terahertz Emitters, Receivers, and Applications II; 81190D (2011) https://doi.org/10.1117/12.899131
Event: SPIE Photonic Devices + Applications, 2011, San Diego, California, United States

Abstract

In the past decade, tremendous development has been made in GaAs/AlGaAs based THz quantum cascade laser (QCLs), however, the maximum operating temperature is still limited below 200 K (without magnetic field). THz QCL based on difference frequency generation (DFG) represents a viable technology for room temperature operation. Recently, we have demonstrated room temperature THz emission (~ 4 THz) up to 8.5 μW with a power conversion efficiency of 10 μW/W2. A dual-period distributed feedback grating is used to filter the mid-infrared spectra in favor of an extremely narrow THz linewidth of 6.6 GHz.

Citation Download Citation

Manijeh Razeghi "Recent advances of terahertz quantum cascade lasers", Proc. SPIE 8119, Terahertz Emitters, Receivers, and Applications II, 81190D (7 September 2011); https://doi.org/10.1117/12.899131

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