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Title: Random lasing in organo-lead halide perovskite microcrystal networks

We report optically pumped random lasing in planar methylammonium lead iodide perovskite microcrystal networks that form spontaneously from spin coating. Low thresholds (<200 μJ/cm{sup 2}) and narrow linewidths (Δλ < 0.5 nm) reflect lasing from closed quasi-modes that result from ballistic waveguiding in linear network segments linked by scattering at the junctions. Spatio-spectral imaging indicates that these quasi-modes extend over lateral length scales >100 μm and spatially overlap with one another, resulting in chaotic pulse-to-pulse intensity fluctuations due to gain competition. These results demonstrate this class of hybrid organic-inorganic perovskite as a platform to study random lasing with well-defined, low-level disorder, and support the potential of these materials for use in semiconductor laser applications.
Authors:
; ;  [1] ; ; ;  [2]
  1. Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
  2. Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
Publication Date:
OSTI Identifier:
22350883
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CHAOS THEORY; ELECTRIC CONTACTS; FLUCTUATIONS; LEAD IODIDES; LINE WIDTHS; OPTICAL PUMPING; PEROVSKITE; PULSES; RANDOMNESS; SCATTERING; SEMICONDUCTOR JUNCTIONS; SEMICONDUCTOR LASERS; SPIN-ON COATING; WAVEGUIDES