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- W2747039683 abstract "The focus of this thesis was the performance improving application of more than two alloys for active regions of injectorless quantum cascade lasers. As the complexity and freedom in design increases, suitable algorithms for the design process had to be developed. With this approach, former threshold current densities of 0.73 kA/cm² were reduced to record low 0.45 kA/cm² along with increased thermal stability. Another device optimization on output performance increased the overall efficiency from 2.4 % to 7.1 %. Both improvements enabled previously not-existent continuous wave operation of injectorless devices above room temperature, exhibiting an acceptable 1.73 kA/cm2 at 293 K. Besides these improvements, detailed analysis of injectorless active regions, especially their field and current dependent gain and injection behavior were investigated." @default.
- W2747039683 created "2017-08-31" @default.
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- W2747039683 date "2011-01-01" @default.
- W2747039683 modified "2023-09-27" @default.
- W2747039683 title "Multi-Alloy Structures for Injectorless Quantum Cascade Lasers" @default.
- W2747039683 hasPublicationYear "2011" @default.
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