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Terahertz saturable absorbers from liquid phase exfoliation of graphite

Author

Listed:
  • Vezio Bianchi

    (NEST, CNR-Istituto Nanoscienze and Scuola Normale Superiore)

  • Tian Carey

    (Cambridge Graphene Centre, University of Cambridge)

  • Leonardo Viti

    (NEST, CNR-Istituto Nanoscienze and Scuola Normale Superiore)

  • Lianhe Li

    (School of Electronic and Electrical Engineering, University of Leeds)

  • Edmund H. Linfield

    (School of Electronic and Electrical Engineering, University of Leeds)

  • A. Giles Davies

    (School of Electronic and Electrical Engineering, University of Leeds)

  • Alessandro Tredicucci

    (Università di Pisa)

  • Duhee Yoon

    (Cambridge Graphene Centre, University of Cambridge)

  • Panagiotis G. Karagiannidis

    (Cambridge Graphene Centre, University of Cambridge)

  • Lucia Lombardi

    (Cambridge Graphene Centre, University of Cambridge)

  • Flavia Tomarchio

    (Cambridge Graphene Centre, University of Cambridge)

  • Andrea C. Ferrari

    (Cambridge Graphene Centre, University of Cambridge)

  • Felice Torrisi

    (Cambridge Graphene Centre, University of Cambridge)

  • Miriam S. Vitiello

    (NEST, CNR-Istituto Nanoscienze and Scuola Normale Superiore)

Abstract

Saturable absorbers (SA) operating at terahertz (THz) frequencies can open new frontiers in the development of passively mode-locked THz micro-sources. Here we report the fabrication of THz SAs by transfer coating and inkjet printing single and few-layer graphene films prepared by liquid phase exfoliation of graphite. Open-aperture z-scan measurements with a 3.5 THz quantum cascade laser show a transparency modulation ∼80%, almost one order of magnitude larger than that reported to date at THz frequencies. Fourier-transform infrared spectroscopy provides evidence of intraband-controlled absorption bleaching. These results pave the way to the integration of graphene-based SA with electrically pumped THz semiconductor micro-sources, with prospects for applications where excitation of specific transitions on short time scales is essential, such as time-of-flight tomography, coherent manipulation of quantum systems, time-resolved spectroscopy of gases, complex molecules and cold samples and ultra-high speed communications, providing unprecedented compactness and resolution.

Suggested Citation

  • Vezio Bianchi & Tian Carey & Leonardo Viti & Lianhe Li & Edmund H. Linfield & A. Giles Davies & Alessandro Tredicucci & Duhee Yoon & Panagiotis G. Karagiannidis & Lucia Lombardi & Flavia Tomarchio & A, 2017. "Terahertz saturable absorbers from liquid phase exfoliation of graphite," Nature Communications, Nature, vol. 8(1), pages 1-9, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15763
    DOI: 10.1038/ncomms15763
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    Cited by:

    1. Alessandra Di Gaspare & Chao Song & Chiara Schiattarella & Lianhe H. Li & Mohammed Salih & A. Giles Davies & Edmund H. Linfield & Jincan Zhang & Osman Balci & Andrea C. Ferrari & Sukhdeep Dhillon & Mi, 2024. "Compact terahertz harmonic generation in the Reststrahlenband using a graphene-embedded metallic split ring resonator array," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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