2017/08/01 by P. D. Hoang, G. Andonian, I. Gadjev +13 · 33 citations
Engineering · Physics and Astronomy · #Cartesian coordinate system #Dielectric #Geometry #Optics #Optoelectronics #Photonic Crystals and Applications #Photonic and Optical Devices #Physics #Terahertz radiation #Terahertz technology and applications #Transverse plane #physics.acc-ph
paper · pdf · doi:10.1103/physrevlett.120.164801
published in Physical Review Letters 120(16), 164801 (American Physical Society) · Submitted to the Physical Review Letters
arxiv created 2017/08/01 · openalex publication_date 2018/04/19 · arxiv updated 2018/04/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Photonic structures operating in the terahertz (THz) spectral region enable the essential characteristics of confinement, modal control, and electric field shielding for very high gradient accelerators based on wakefields in dielectrics. We report here an experimental investigation of THz wakefield modes in a three-dimensional photonic woodpile structure. Selective control in exciting or suppressing of wakefield modes with a nonzero transverse wave vector is demonstrated by using drive beams of varying transverse ellipticity. Additionally, we show that the wakefield spectrum is insensitive to the offset position of strongly elliptical beams. These results are consistent with analytic theory and three-dimensional simulations and illustrate a key advantage of wakefield systems with Cartesian symmetry: the suppression of transverse wakes by elliptical beams.