Sub-microWatt threshold nanoisland lasers

Hoon Jang (), Indra Karnadi, Putu Pramudita, Jung-Hwan Song, Ki Soo Kim and Yong-Hee Lee ()
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Hoon Jang: Korea Advanced Institute of Science and Technology (KAIST)
Indra Karnadi: Korea Advanced Institute of Science and Technology (KAIST)
Putu Pramudita: Korea Advanced Institute of Science and Technology (KAIST)
Jung-Hwan Song: Korea Advanced Institute of Science and Technology (KAIST)
Ki Soo Kim: Convergence and Components & Materials Research Laboratory, Electronics and Telecommunications Research Institute
Yong-Hee Lee: Korea Advanced Institute of Science and Technology (KAIST)

Nature Communications, 2015, vol. 6, issue 1, 1-5

Abstract: 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 μm3 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.

Date: 2015
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DOI: 10.1038/ncomms9276

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