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

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.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. Pusan National Univ., Busan (Korea); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Ajou Univ., Suwon (Korea)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1593117
Report Number(s):
LA-UR-19-29883
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Roh, Jeongkyun, Park, Young-Shin, Lim, Jaehoon, and Klimov, Victor Ivanovich. Optically pumped colloidal-quantum-dot lasing in LED-like devices with an integrated optical cavity. United States: N. p., 2020. Web. doi:10.1038/s41467-019-14014-3.
Roh, Jeongkyun, Park, Young-Shin, Lim, Jaehoon, & Klimov, Victor Ivanovich. Optically pumped colloidal-quantum-dot lasing in LED-like devices with an integrated optical cavity. United States. doi:10.1038/s41467-019-14014-3.
Roh, Jeongkyun, Park, Young-Shin, Lim, Jaehoon, and Klimov, Victor Ivanovich. Tue . "Optically pumped colloidal-quantum-dot lasing in LED-like devices with an integrated optical cavity". United States. doi:10.1038/s41467-019-14014-3. https://www.osti.gov/servlets/purl/1593117.
@article{osti_1593117,
title = {Optically pumped colloidal-quantum-dot lasing in LED-like devices with an integrated optical cavity},
author = {Roh, Jeongkyun and Park, Young-Shin and Lim, Jaehoon and Klimov, Victor Ivanovich},
abstractNote = {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.},
doi = {10.1038/s41467-019-14014-3},
journal = {Nature Communications},
number = 1,
volume = 11,
place = {United States},
year = {2020},
month = {1}
}

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