Active terahertz metamaterial devices
By Houtong Chen, Willie J Padilla, J. Zide, Arthur C. Gossard, A. Taylor, R. Averitt. Nature, 2006
1,714 citations recorded by the source corpus.
The development of artificially structured electromagnetic materials, termed metamaterials, has led to the realization of phenomena that cannot be obtained with natural materials. This is especially important for the technologically relevant terahertz (1 THz = 1012 Hz) frequency regime; many materials inherently do not respond to THz radiation, and the tools that are necessary to construct devices operating within this range—sources, lenses, switches, modulators and detectors—largely do not exist. Considerable efforts are underway to fill this ‘THz gap’ in view of the useful potential applications of THz radiation. Moderate progress has been made in THz generation and detection; THz quantum cascade lasers are a recent example. However, techniques to control and manipulate THz waves are lagging behind. Here we demonstrate an active metamaterial device capable of efficient real-time control and manipulation of THz radiation. The device consists of an array of gold electric resonator elements (the metamaterial) fabricated on a semiconductor substrate. The metamaterial array and substrate together effectively form a Schottky diode, which enables modulation of THz transmission by 50 per cent, an order of magnitude improvement over existing devices.
Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/9cb56b6fcddb52c2cb313d5759dc45129674eea1
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Citations in the corpus
- Fano-resonant metamaterials and their applications (2013, neutral): “…for various (not necessarily Fano-resonant) metamaterials and meta-surfaces include using phase-change media [128, 129], liquid crystals [130– 132], carrier manipulation in semiconductor substrates [133], electrical modulation with graphene [134–136], and electromechnical reconfiguration [137].”
- Metamaterial-based perfect absorbers (2014, background): “The design flexibility associated with MMs provides a promising approach, from a device perspective, towards filling the THz gap.[83] In this Section, recent progresses on THz MM devices relevant to absorption will be reviewed with emphasis on the real-world applicability.”
- Switching terahertz waves with gate-controlled active graphene metamaterials. (2012, background): “In this paper, we experimentally demonstrate that substantial gate-induced persistent switching and linear modulation of terahertz waves can be achieved in a 2D artificial material integrated with atomically thin, 2D graphene layer, referred to as an active metamaterial [7].”
- Experimental demonstration of frequency-agile terahertz metamaterials (2008, background): “They also show great potential for the construction of novel devices including gradient index lenses[11, 12], components for the terahertz[13–15], and compact waveguides[16? ].”