Phonon-Induced Transparency in Functionalized Single Layer Graphene

摘要: Herein, intervalley scattering is exploited to account for anomalous antiresonances in the infrared spectra of doped and disordered single layer graphene. We present spectroscopy measurements graphene grafted with iodophenyl moieties both reflection microscopy transmission configurations. Asymmetric transparency windows at energies corresponding phonon modes near {\Gamma} K points are observed, contrast featureless spectrum pristine These asymmetric demonstrated vary as a function chemical potential. propose model which involves coherent intraband defects phonons, thus relaxing optical selection rule forbidding access ${\bf q} \neq$ phonons. This interpretation new phenomenon supported by our numerical simulations that reproduce experimental features.