Tuning of light-graphene interactions

Sanshui Xiao (Invited author)

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— Graphene opens up for novel optoelectronic applications thanks to its high carrier mobility, ultra-large absorption bandwidth, and extremely fast material response. In particular, the opportunity to control optoelectronic properties through Fermi-level tuning enables electrooptical modulation, optical-optical switching, and other optoelectronics applications. Except for the statistic gating and chemical doping, the Fermi level of graphene can also be optically tuned. With the aid of external optical pumping, electrons can be excited in the substrate, then move to the graphene layer, leading to the electrical doping in graphene. In this talk, I will firstly discuss how the graphene property changes when applying the optical pumping with different incident power. Then I will discuss graphene-silicon microring devices with having a high modulation depth and with a relatively low bias voltage. Finally, I will discuss a novel hybrid graphenemetal system for studying light-matter interactions with gold-void nanostructures exhibiting resonances in the visible range. The hybrid system is further explored for sensing of Rhodamine 6G molecules with respect to the strong surface-enhanced Raman scattering.
Original languageEnglish
Publication date2015
Number of pages1
Publication statusPublished - 2015
Event2015 Progress In Electromagnetics Research Symposium - Prag, Czech Republic
Duration: 6 Jul 20159 Jul 2015


Conference2015 Progress In Electromagnetics Research Symposium
CountryCzech Republic

Bibliographical note

Invited talk at PIERS 2015 in Prague, Czech Republic, on July 6-9, 2015


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