Light-Matter Interaction in Graphene-Silicon Cavity

When: Wednesday, May 08, 2013 at 4:00 pm
Where: DA 114
Speaker: Tingyi Gu
Organization: PhD Candidate, Columbia University
Sponsor: Joint Physics/Electrical and Computer Engineering Seminar

We exam nonlinear and optoelectronic measurements of photons on-chip. In this talk we describe on our studies of optical nonlinearities and carrier dynamics in graphene. Measurements on the graphene-silicon hybrid photonic crystals resonator demonstrate enhanced two photon absorption and Kerr nonlinearity, inducing experimental observations such as bistability, regenerative oscillation and degenerate four-wave mixing. The electrical contact between graphene-silicon is of paramount importance for experimental observations, and useful for developing graphene flexible electrodes, low power silicon photonics, etc.