Sub-microWatt threshold nanoisland lasers.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 26391800.
- Also identified by DOI 10.1038/ncomms9276 and PMC identifier 4595645.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Ultralow threshold nanolasers have been sought after as power efficient light sources in photonic integrated circuits. Here a single-cell nanobeam laser with a nanoisland quantum well is proposed and demonstrated. Continuous operation at 1.5 μm is achieved at room temperature with an ultralow lasing threshold of 210 nW in absorbed power. The size of the active medium is reduced to 0.7 × 0.25 × 0.02 μm(3) by removing the absorptive quantum well region surrounding the central cavity. Relatively thick (420 nm) InP slabs are employed to improve the thermal and mechanical characteristics. The nanoisland-based structures will provide a new platform to engineer fundamental light-matter interactions by controlling the size and the location of the nanoemitters, allowing the realization of highly efficient nanophotonic devices.