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Terahertz saturable absorbers from liquid phase exfoliation of graphite

Bianchi, Vezio, Carey, Tian, Viti, Leonardo, Li, Lianhe, Linfield, Edmund H., Davies, A. Giles, Tredicucci, Alessandro, Yoon, Duhee, Karagiannidis, Panagiotis, Lombardi, Lucia, Tomarchio, Flavia, Ferrari, Andrea C., Torrisi, Felice and Vitiello, Miriam S. (2017) Terahertz saturable absorbers from liquid phase exfoliation of graphite. Nature Communications, 8. p. 15763. ISSN 2041-1723

Item Type: Article


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.

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Depositing User: Barry Hall


Item ID: 7595
Identification Number:
ISSN: 2041-1723
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ORCID for Panagiotis Karagiannidis: ORCID iD

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Date Deposited: 19 Jul 2017 10:26
Last Modified: 24 Feb 2021 13:47


Author: Panagiotis Karagiannidis ORCID iD
Author: Vezio Bianchi
Author: Tian Carey
Author: Leonardo Viti
Author: Lianhe Li
Author: Edmund H. Linfield
Author: A. Giles Davies
Author: Alessandro Tredicucci
Author: Duhee Yoon
Author: Lucia Lombardi
Author: Flavia Tomarchio
Author: Andrea C. Ferrari
Author: Felice Torrisi
Author: Miriam S. Vitiello

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Faculty of Technology
Faculty of Technology > School of Engineering



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