Ultrafast plasmonic processes in atomically thin materials
Prof. Javier Garcia de Abajo, ICFO Barcelona
Atomically thin materials such as graphene and other 2D crystals exhibits unique electrical, optical, and thermal properties that are a continuous source of unexpected phenomena. In this colloquim, I will review recent advances in the field of graphene nanophotonics, including the following results obtained by my group: the design and realistic description of a new class of random metamaterials incorporating optical gain and displaying a varied photonic behaviour ranging from stable lasing to chaotic regimes ; a new strategy for molecular sensing that relies on the strong plasmon-driven nonlinearity of nanographenes ; a scenario in which radiative heat transfer is the fastest cooling mechanism, even beating relaxation to phonons ; and the generation of intense high harmonics from graphene, assisted by its plasmons . These results constitute examples that extend ultrafast optical phenomena in new directions with strong potential for technological applications.
 A. Marini and F. J. García de Abajo, "Graphene-based active random metamaterial for cavity-free lasing," Phys. Rev. Lett. 116, 217401 (2016).
 R. Yu, J. D. Cox, and F. J. García de Abajo, "Nonlinear plasmonic sensing with nanographene," Phys. Rev. Lett. 117, 123904 (2016).
 R. Yu, A. Manjavacas, and F. J. García de Abajo, "Ultrafast radiative heat transfer," arXiv:1608.05767.
 J. D. Cox, A. Marini, and F. J. García de Abajo, "Plasmon-assisted high-harmonic generation in graphene," arXiv:1609.09794.