{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/45832"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/45832","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Design of high efficiency Mid IR QCL lasers","abstract":"The proposed research is a study of designing high-efficiency Mid-IR quantum cascade lasers (QCL). This thesis explores \"injector-less\" designs for achieving lower voltage defects and improving wall plug efficiencies through highly strain-balanced structures and minimized injector regions. 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