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Optically pumped colloidal-quantum-dot lasing in LED-like devices with an integrated optical cavity

Author

Listed:
  • Jeongkyun Roh

    (Los Alamos National Laboratory
    Pusan National University)

  • Young-Shin Park

    (Los Alamos National Laboratory
    University of New Mexico)

  • Jaehoon Lim

    (Los Alamos National Laboratory
    Ajou University)

  • Victor I. Klimov

    (Los Alamos National Laboratory)

Abstract

Realization of electrically pumped lasing with solution processable materials will have a revolutionary impact on many disciplines including photonics, chemical sensing, and medical diagnostics. Due to readily tunable, size-controlled emission wavelengths, colloidal semiconductor quantum dots (QDs) are attractive materials for attaining this goal. Here we use specially engineered QDs to demonstrate devices that operate as both a light emitting diode (LED) and an optically pumped laser. These structures feature a distributed feedback resonator integrated into a bottom LED electrode. By carefully engineering a refractive-index profile across the device, we are able to obtain good confinement of a waveguided mode within the QD medium, which allows for demonstrating low-threshold lasing even with an ultrathin (about three QD monolayers) active layer. These devices also exhibit strong electroluminescence (EL) under electrical pumping. The conducted studies suggest that the demonstrated dual-function (lasing/EL) structures represent a promising device platform for realizing colloidal QD laser diodes.

Suggested Citation

  • Jeongkyun Roh & Young-Shin Park & Jaehoon Lim & Victor I. Klimov, 2020. "Optically pumped colloidal-quantum-dot lasing in LED-like devices with an integrated optical cavity," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-14014-3
    DOI: 10.1038/s41467-019-14014-3
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    Cited by:

    1. Heeyoung Jung & Young-Shin Park & Namyoung Ahn & Jaehoon Lim & Igor Fedin & Clément Livache & Victor I. Klimov, 2022. "Two-band optical gain and ultrabright electroluminescence from colloidal quantum dots at 1000 A cm−2," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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