Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 20, Issue 1-4, Pages 303-305Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2007.913340
Keywords
frequency control; intersubband transitions; quantum cascade laser (QCL); semiconductor laser; terahertz (THz)
Funding
- EPSRC [EP/D025532/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D025532/1] Funding Source: researchfish
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The laser emission frequencies of existing designs are controlled by uniform thickness transformations. Experimental results from a total of ten wafers are presented demonstrating a predictable shift in the emission wavelength concurrent with an anticipated alteration in electrical transport. Wafers based on a design around 2.9 THz produced a frequency shift of 0.35 THz. Furthermore, a 2.5% thickness reduction in our 2-THz design saw a 0.1-THz frequency shift and changes in electrical transport predicted by simulations.
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