2016/02/08 by A. K. Popov, Popov, A. K., I. S. Nefedov +4 · 1 citation
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Optics (physics.optics) #Photonic and Optical Devices #Plasmonic and Surface Plasmon Research #physics.optics
paper · pdf · doi:10.48550/arxiv.1602.02497
11 pages, 10 figures
arxiv created 2016/02/08 · openalex publication_date 2016/02/08 · arxiv updated 2016/02/09 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We show that deliberately engineered spatially dispersive metamaterial slab can enable co-existence and phase matching of contra-propagating ordinary fundamental and backward second harmonic electromagnetic modes. Energy flux and phase velocity are contra-directed in backward waves which determines extraordinary nonlinear-optical propagation processes. Frequencies, phase and group velocities, as well as nanowavequide losses inherent to the electromagnetic modes supported by the metamaterial can be tailored to optimize nonlinear-optical conversion of frequencies and propagation directions of the coupled waves. Such a possibility, which is of paramount importance for nonlinear photonics, is proved with numerical model of the hyperbolic metamaterial made of carbon nanotubes standing on metal surface. Extraordinary properties of backward-wave second harmonic in the THz and IR propagating in the reflection direction are investigated with focus on pulsed regime.