Terahertz and mid-infrared plasmons in three-dimensional nanoporous graphene
- Universita` di Roma La Sapienz, Roma (Italy). Ins. Italiano di Tecnoolgia and Dept. di Fisica; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); DOE/OSTI
- Universita` di Roma La Sapienz, Roma (Italy). Dept. of Physics. INFN
- National Inst. of Nuclear Physics (INFN), Frascati (Italy). National Lab. of Frascati (INFN-LNF)
- Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH, Berlin (Germany). Methoden der Materialentwicklung
- Tohoku Univ., Sendai (Japan). WPI-Advanced Inst. for Materials Research
- Tohoku Univ., Sendai (Japan). WPI-Advanced Inst. for Materials Research; Shanghai Jiao Tong Univ. (China). School of Materials Science and Engineering; CREST, Saitama (Japan). Japan Science and Technology Agency
- University of Rome La Sapienza, Rome (Italy). CNR-IOM. Dept. of Physics
Two-dimensional (2D) graphene emerged as an outstanding material for plasmonic and photonic applications due to its charge-density tunability, high electron mobility, optical transparency and mechanical flexibility. Recently, novel fabrication processes have realised a three-dimensional (3D) nanoporous configuration of high-quality monolayer graphene which provides a third dimension to this material. In this work, we investigate the optical behaviour of nanoporous graphene by means of terahertz and infrared spectroscopy. We reveal the presence of intrinsic 2D Dirac plasmons in 3D nanoporous graphene disclosing strong plasmonic absorptions tunable from terahertz to mid-infrared via controllable doping level and porosity. In the far-field the spectral width of these absorptions is large enough to cover most of the mid-Infrared fingerprint region with a single plasmon excitation. The enhanced surface area of nanoporous structures combined with their broad band plasmon absorption could pave the way for novel and competitive nanoporous-graphene based plasmonic-sensors.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1623883
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 8; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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