In this section
@article{Bianchi:2017:10.1038/ncomms15763,
author = {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},
doi = {10.1038/ncomms15763},
journal = {Nature Communications},
title = {Terahertz saturable absorbers from liquid phase exfoliation of graphite},
url = {http://dx.doi.org/10.1038/ncomms15763},
volume = {8},
year = {2017}
}
TY - JOUR
AB - 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.
AU - Bianchi,V
AU - Carey,T
AU - Viti,L
AU - Li,L
AU - Linfield,EH
AU - Davies,AG
AU - Tredicucci,A
AU - Yoon,D
AU - Karagiannidis,PG
AU - Lombardi,L
DO - 10.1038/ncomms15763
PY - 2017///
SN - 2041-1723
TI - Terahertz saturable absorbers from liquid phase exfoliation of graphite
T2 - Nature Communications
UR - http://dx.doi.org/10.1038/ncomms15763
UR - https://www.ncbi.nlm.nih.gov/pubmed/28643788
UR - http://hdl.handle.net/10044/1/69388
VL - 8
ER -
Dr Felice Torrisi
Senior Lecturer in Chemistry of Two-Dimensional Materials
401A
Molecular Sciences Research Hub
White City Campus
f.torrisi@imperial.ac.uk
+44 (0)20 7594 5818