2014/07/31 by Ibraheem Al‐Naib, Ibraheem Al-Naib, J. E. Sipe +1 · 1 citation
Engineering · Physics and Astronomy · #Amplitude #Condensed matter physics #Field (mathematics) #Formalism (music) #Gauge theory #Graphene #High harmonic generation #Materials science #Nonlinear system #Photonic and Optical Devices #Physics #Plasmonic and Surface Plasmon Research #Quantum mechanics #Second-harmonic generation #Terahertz radiation #Terahertz technology and applications #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.1103/physrevb.90.245423
published as Phys. Rev. B. 90, 245423 (2014)
openalex publication_date 2014/12/15 · arxiv created 2014/12/16 · arxiv updated 2014/12/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We develop a density-matrix formalism in the length gauge to calculate the nonlinear response of intrinsic monolayer graphene at terahertz frequencies. Employing a tight-binding model, we find that the interplay of the interband and intraband dynamics leads to strong harmonic generation at moderate field amplitudes. In particular, we find that at low temperature, the reflected field of undoped suspended graphene exhibits a third harmonic amplitude that is 32% of the fundamental for an incident field of 100 V/cm. Moreover, we find that up to the seventh harmonic and beyond are generated.