Because of its excellent electronic and photonic properties, graphene has attracted enormous interest. Its charge mobility, electrical conductivity and optical transparency in addition to its flexibility, robustness and environmental stability make graphene a promising material for a wide range of applications ranging from electronics through photonics to plasmonics. However, its true potential application will not be attained until production compatible methods are achieved.

In this talk I present CVD based large-scale high quality graphene synthesis for electronic applications. Simultaneous growth of the multi-layer and single-layer graphenes changing continuously the electrical resistance and the optical transmittance is introduced. I also demonstrate a flexible and transparent gas molecule sensor consisting of a graphene sensor channel and a graphene heater. This combined structure leads to fully utilizing unique transparent and flexible functionalities of graphene with invariable sensing performance under a bending condition.

I also introduce the progress in graphene-based photonic and plasmonic devices such as thermo-optic mode extinction modulator and planar lightwave circuit-type plasmonic photodetector for all graphene-based photonic integrated circuits (PICs). A thermo-optic (TO) mode extinction modulator based on graphene plasmonic waveguide is introduced. The graphene plasmonic waveguide is served as a light signal guiding medium with a successful 2.5 Gbps optical signal transmission at a wavelength of 1.31 µm. A planar-type graphene plasmonic photodetector is also introduced with the configuration of the graphene plasmonic waveguide and photodetector structure all-in-one to detect horizontally incident light for the easy and simple integration.

Biography:
Choon-Gi Choireceived the doctorate in Physicsfrom UniversitédʼOrléans, Francein 1996. He is currently a director at Creative Research Center for Graphene Electronics in Electronics and Telecommunications Research Institute (ETRI), Korea and a professor at the department of advanced device technology in University of Science and Technology (UST), Korea. He is also an associate editor of the Nano Convergence journal with Springer publishing. From 1996 until now, he is working for the ETRI, where he has developed micro- and nano-photonic and optoelectronic devices and graphene-based electronic and photonic devices. His current research interests are large-scale graphene synthesis, graphene and TMDC-based electronic and photonic devices, metamaterial-based 3D holographic devices, nano-structured photonic and optoelectronic devices, etc. He has authored or co-authored over 100 papers and holds over 20 U.S. patents as well as 50 Korean patents.