THz wave emission from the Cu2O/Cu interface under femtosecond laser irradiation
- 24 December 2020
- journal article
- Published by IOP Publishing in Applied Physics Express
- Vol. 14 (1), 012006
- https://doi.org/10.35848/1882-0786/abd070
Abstract
Cu or Cu/Au (80 nm thick Cu, 50 nm thick Au) sputtered on Si were kept at 25 °C for a week or annealed at a temperature from 80 to 300 °C, then tested for THz emission under femtosecond laser irradiation (35 fs-800 nm). THz radiation was detected from samples annealed from 80 to 170 °C, which had a Cu2O/Cu interface as the THz source. Cu/Au/Si annealed at 80 °C emitted the highest THz radiation because of high laser absorption by the porous Cu2O layer formed at low temperature and the Au film reflected THz radiation and/or increased the laser absorption by the Fabry–Pérot effect.Keywords
Funding Information
- he Cooperative Research Program of “Network Joint Research Center for Materials and Devices”
- Nanotechnology Platform
- Sumitomo Foundation
- Japan Society for the Promotion of Science (18KK0159)
- Ministry of Science and Technology (107-2112-M-001-014-MY3)
- Collaborative Research Projects of Laboratory for Materials and Structures, Institute of Innovative Research
This publication has 29 references indexed in Scilit:
- Highly sensitive and selective sugar detection by terahertz nano-antennasScientific Reports, 2015
- TeraHertz imaging of hidden paint layers on canvasOptics Express, 2009
- Nondestructive evaluation of aircraft composites using transmissive terahertz time domain spectroscopyOptics Express, 2008
- Terahertz imaging for non-destructive evaluation of mural paintingsOptics Communications, 2008
- Short-Range Ultra-Broadband Terahertz Communications: Concepts and PerspectivesIEEE Antennas and Propagation Magazine, 2007
- Localized terahertz generation via optical rectification in ZnTeJournal of the Optical Society of America B, 2005
- THz-Spectroscopy of Biological MoleculesJournal of Biological Physics, 2003
- Terahertz optical rectification from 〈110〉 zinc-blende crystalsApplied Physics Letters, 1994
- Optoelectronically pulsed slot-line antennasElectronics Letters, 1983
- Picosecond microwave pulses generated with a subpicosecond laser-driven semiconductor switchApplied Physics Letters, 1981