2004/12/02 by Jaime Gómez Rivas, J. Gomez Rivas, A. Farré Benet +5
Engineering · Physics and Astronomy · #Photonic Crystals and Applications #Photonic and Optical Devices #Terahertz technology and applications #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.71.155110
published as Phys. Rev. B 71, 155110 (2005) · 7 pages, 11 figures
arxiv created 2004/12/02 · openalex publication_date 2005/04/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A time-resolved analysis of the amplitude and phase of THz pulses propagating through three-dimensional photonic crystals is presented. Single-cycle pulses of THz radiation allow measurements over a wide frequency range, spanning more than an octave below, at and above the bandgap of strongly dispersive photonic crystals. Transmission data provide evidence for slow group velocities at the photonic band edges and for superluminal transmission at frequencies in the gap. Our experimental results are in good agreement with finite-difference-time-domain simulations.