infrared millimeter terahertz waves scientific conferences

We study the electronic contribution to the nonlinear optical response of the -T3 model. This model is an interpolation between a graphene (=0) and dice or T3 (=1) lattice. Using a second-quantised formalism we calculate the first and third order responses for a range of and chemical potential values as well as considering a band gap in the first-order case. Conductivity quantisation is observed in the first order, whilst Higher-order Harmonic Generation (HHG) is observed in the third order response with the chemical potential determining which applied field frequencies both quantisation and HHG occur at.