Date
Place
- Room D (Room 322)
- 11. 2D Materials: Thin Film Devices
- August 19, 2015 (Wednesday)
- 14:00 ~ 15:45
- [11-1]
- 14:00 ~ 14:25
- Title:[Invited] High-Performance Graphene Devices for Light Emission, Detection, and Modulation
- Young Duck Kim, Yuanda Gao, Sunwoo Lee, and James Hone (Columbia Univ., U.S.A.)
Abstract: The unique electronic and optical properties of graphene make it an extremely promising material for optoelectronic applicatons.? However, most such devices have utilized graphene on standard oxides, in which substrate-induced disorder and scattering substantially limits performance.??We have pioneered and perfected techniques for achieving ultrahigh performance in graphene using hexagonal boron nitride (hBN) as an insulating dielectric.? Using these devices, we have investigated a number of different properties and device architectures for optoelectronics:? (1) ultrafast photodetectors integrated with waveguides; (2) modulators consisting of double-layer graphene structures integrated with photonic crystals; (3) sharp and tunable plasmonic resonances.? In addition, we have demonstrated that hBN-encapsulated graphene can sustain large currents to enable broadband visible light emission.? These devices can be integrated on-chip and have operational lifetimes of many years.? Therefore, we can now envision ultrafast photonic circuits with key active elements constructed entirely from graphene.
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