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In this report we study the nanoscale coherent light sources on GaAs and Si using single rolled-up InGaAs/GaAs quantum dot microtubes. Such microtubes are formed by self-rolling of coherently strained InGaAs/GaAs quantum dot heterostructures through controlled release from their host substrates [1-3]. We have developed a substrate-on-substrate transfer process [3] and realized nearly defect-free quantum...
In this paper the characteristics of an electrically injected PC microcavity device with quantum dot (QD) active region and air-bridge electrical contacts to the PC microcavity is presented. Air bridges are 300nm tall, 300-500nm wide, 3-13mum long and have surface contact width ~200-300nm. Arrays of microcavity light emitters are fabricated by interconnecting multiple PC microcavities by nano-bridges...
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