%0 Electronic Article %A Lianhe Li %+ School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom %A Li Chen %+ School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom %A Jingxuan Zhu %+ School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom %A J. Freeman %+ School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom %A P. Dean %+ School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom %A A. Valavanis %+ School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom %A A.G. Davies %+ School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom %A E.H. Linfield %+ School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom %K one-well injector %K surface-plasmon waveguide %K terahertz frequency quantum cascade lasers %K THz QCL %K laser output powers %K pulsed mode %K temperature 77 K %K optical collection efficiency %K power 1.01 W %K power 420 mW %K frequency 3.4 THz %K temperature 123 K %K bound-to-continuum transition %K temperature 10 K %X Terahertz (THz) frequency quantum cascade lasers emitting peak powers of >1 W from a single facet in the pulsed mode are demonstrated. The active region is based on a bound-to-continuum transition with a one-well injector, and is embedded into a surface-plasmon waveguide. The lasers emit at a frequency of ∼3.4 THz and have a maximum operating temperature of 123 K. The maximum measured emitted powers are ∼1.01 W at 10 K and ∼420 mW at 77 K, with no correction made to allow for the optical collection efficiency of the apparatus. %@ 0013-5194 %T Terahertz quantum cascade lasers with >1 W output powers %B Electronics Letters %D February 2014 %V 50 %N 4 %P 309-311 %I Institution of Engineering and Technology %U https://digital-library.theiet.org/;jsessionid=ay6vcw0c3oqm.x-iet-live-01content/journals/10.1049/el.2013.4035 %G EN