Advanced Materials

Ultra-Broad Optical Amplification and Two-Colour Amplified Spontaneous Emission in Binary Blends of Insulated Molecular Wires

Authors

  • Sergio Brovelli,

    1. London Centre for Nanotechnology, and Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT (UK)
    Current affiliation:
    1. Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
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  • Tersilla Virgili,

    1. IFN-CNR c/o Dipartimento di Fisica, Politecnico di Milano, Piazza L. Da Vinci 32, Milano 20133 (Italy)
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  • Marta M. Mroz,

    1. Dipartimento di Fisica, Politecnico di Milano, Piazza L. Da Vinci 32, Milano 20133 (Italy)
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  • Giuseppe Sforazzini,

    1. Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
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  • Alberto Paleari,

    1. Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, via Cozzi 53, I-20125 Milano (Italy)
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  • Harry L. Anderson,

    Corresponding author
    1. Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
    • Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK)
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  • Guglielmo Lanzani,

    Corresponding author
    1. Center for the Nano Science and Technology of IIT at POLIMI, via Pascoli 70/3, Milano 20133 (Italy)
    • Center for the Nano Science and Technology of IIT at POLIMI, via Pascoli 70/3, Milano 20133 (Italy).
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  • Franco Cacialli

    Corresponding author
    1. London Centre for Nanotechnology, and Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT (UK)
    • London Centre for Nanotechnology, and Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT (UK)
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Abstract

We demonstrate optical amplification over a band >850 meV, via simultaneous exploitation of stimulated emission from mixed polymer systems in which energy transfer from the higher to lower-gap material is inhibited thanks to a complex interplay between morphology and interchain decoupling, driven by chain encapsulation. Amplified spontaneous emission (ASE) is obtained both with ad-hoc pumping into the relevant bands or with a single excitation (400nm) able to sustain ASE at both wavelengths simultaneously (two-colour ASE).

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