CUED Publications database

Terahertz saturable absorbers from liquid phase exfoliation of graphite

Bianchi, V and Carey, T and Viti, L and Li, L and Linfield, EH and Davies, AG and Tredicucci, A and Yoon, D and Karagiannidis, PG and Lombardi, L and Tomarchio, F and Ferrari, AC and Torrisi, F and Vitiello, MS (2017) Terahertz saturable absorbers from liquid phase exfoliation of graphite. Nature Communications, 8. 15763-.

Full text not available from this repository.


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.

Item Type: Article
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:06
Last Modified: 10 Apr 2021 00:49
DOI: 10.1038/ncomms15763