High-power epitaxial-side down mounted terahertz quantum cascade lasers

High-power epitaxial-side down mounted terahertz quantum cascade lasers

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High-power terahertz quantum cascade lasers at −97.4 μm based on coplanar waveguide epitaxial-side down (Epi-down) mounting technique are presented. With the improved thermal management, excellent performance is obtained for the Epi-down mounted lasers. The maximum output powers of 685 mW in pulsed mode and 164 mW in continuous-wave (C-W) mode are realised at 10 K. The maximum C-W wall-plug efficiency of 1.67% is also realised. Fundamental lateral mode emissions are achieved for wide ridge lasers through a mode loss differentiation process.


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      • 8. Yan, F.L., Zhang, J.C., Liu, C.W., et al: ‘Sample grating distributed feedback quantum cascade laser array’, Nanoscale Res. Lett., 2015, 10, pp. 406-1406-5, doi: 10.1186/s11671-015-1115-9.
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