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Inkjet-printed perovskite distributed feedback lasers.

Florian Mathies, Philipp Brenner, Gerardo Hernandez-Sosa

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    |February 7, 2018
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    Summary

    Digitally printed perovskite lasers on flexible substrates achieve low thresholds and narrow linewidths. This inkjet printing method enables scalable, low-cost laser fabrication with arbitrary shapes.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Additive Manufacturing

    Background:

    • Distributed feedback lasers are crucial for various optical applications.
    • Perovskite materials offer promising gain properties for laser development.
    • Digital printing techniques allow for precise fabrication of optical devices.

    Purpose of the Study:

    • To demonstrate digitally printed distributed feedback lasers using perovskite gain materials on flexible substrates.
    • To investigate the impact of ink formulation and surface roughness on laser performance.
    • To explore the potential for large-scale, low-cost laser manufacturing with arbitrary designs.

    Main Methods:

    • Utilizing a digital drop-on-demand inkjet printer for perovskite laser fabrication.
    • Optimizing perovskite ink composition to reduce surface roughness (<7 nm) and enhance processing.
    • Processing lasers on both rigid and flexible polyethylene terephthalate (PET) substrates, including nanopatterned surfaces.

    Main Results:

    • Achieved lasing in inkjet-printed perovskite lasers on PET substrates.
    • Demonstrated a narrow linewidth of 0.4 nm and a lasing threshold of 270 kW/cm².
    • Showcased high uniformity and low spatial variation in distinct printed laser shapes.

    Conclusions:

    • Digital inkjet printing is a viable method for fabricating high-performance perovskite lasers on flexible materials.
    • Optimized perovskite inks and printing processes enable low-threshold, narrow-linewidth lasing.
    • This technology holds significant potential for scalable, cost-effective, and customizable laser applications.