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Amplified Spontaneous Emission in Conjugated Polyrotaxanes Under Quasi-cw Pumping

Authors

  • Marta M. Mróz,

    Corresponding author
    1. Instituto Madrileño de Estudios Avanzados, (IMDEA-Nanociencia), Cantoblanco, Madrid 28049, Spain
    2. IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci, 32, Milano 20133, Italy
    • Instituto Madrileño de Estudios Avanzados, (IMDEA-Nanociencia), Cantoblanco, Madrid 28049, Spain.
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  • Giuseppe Sforazzini,

    1. Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
    Current affiliation:
    1. Department of Organic Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva 4, Switzerland
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  • Yongchun Zhong,

    1. Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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  • Kam Sing Wong,

    1. Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
    Current affiliation:
    1. Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Jinan University, Guangzhou 510632, P.R. China
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  • Harry L. Anderson,

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

    1. Center for Nano Science and Technology@Polimi, Istituto, Italiano di Tecnologia, via Pascoli 70/3 Milano 20133, Italy
    2. IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci, 32, Milano 20133, Italy
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  • Juan Cabanillas-Gonzalez

    1. Instituto Madrileño de Estudios Avanzados, (IMDEA-Nanociencia), Cantoblanco, Madrid 28049, Spain
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Abstract

Amplified spontaneous emission under millisecond pulsed excitation on a rotaxane–insulated conjugated polymer is reported. Pump-probe spectroscopy confirms the absence of polaron-pair absorption in the gain spectral region as the main factor contributing to quasi-steady-state amplified spontaneous emission. The low polaron-pair yield in this compound is the likely result of effective backbone encapsulation provided by the threading ring.

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