研究目的
To explore the unique properties of graphene for enabling graphene plasmonic devices that could revolutionize the terahertz (THz) electronic technology, focusing on the excitation of resonant plasma waves, different mechanisms of plasma wave excitation, and the potential for improved THz device configurations through graphene bilayer and multilayer structures.
研究成果
Graphene plasmonics is expected to play a special role because it takes full advantage of the unique properties of graphene ranging from its two-dimensional structure to high optical phonon energy and a long momentum relaxation time. It has demonstrated potential for enhancing the response by several orders of magnitude using tunable resonance modes and allows for the direct coupling of THz, infrared, and optical signals, avoiding the detrimental contributions from interconnects and contacts. Some important developments such as integration with silicon and 2D heterostructures, grating gate graphene structures, and graphene plasmonic antennas and waveguides, will undoubtedly be explored further.
研究不足
The key challenges in plasmonic graphene technology are bridging the gap between the predicted and demonstrated performance and bringing this technology to a market. The roadblocks include the difficulty of producing graphene of high quality, making good low resistance stable Ohmic contacts, and large-scale processing. Graphene edges, vacancies, variation in the number of layers, and local disorder all affect the graphene quality, reproducibility, and, as a consequence, the device performance and scale-up.
