2008/09/24 by Gang Wang, Jiping Huang, Ji Ping Huang +2
Engineering · Physics and Astronomy · #Amplitude #Bloch oscillations #Electric field #Materials science #Optics #Optoelectronics #Perpendicular #Photonic Crystals and Applications #Photonic and Optical Devices #Photonic crystal #Photonics #Physics #Terahertz radiation #Terahertz technology and applications #cond-mat.other #cond-mat.soft #physics.optics
paper · pdf · doi:10.1364/ol.33.002200
published as Optics Letters, Vol. 33, 2200 (2008)
openalex publication_date 2008/09/24 · arxiv created 2008/10/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We exploit theoretically the occurrence and tunability of photonic Bloch oscillations (PBOs) in one-dimensional photonic crystals (PCs) containing nonlinear composites. Because of the enhanced third-order nonlinearity (Kerr-type nonlinearity) of composites, photons undergo oscillations inside tilted photonic bands, which are achieved by the application of graded external-pump electric fields on such PCs, varying along the direction perpendicular to the surface of layers. The tunability of PBOs (including amplitude and period) is readily achieved by changing the field gradient. With an appropriate graded pump ac or dc electric field, terahertz PBOs can appear and cover a terahertz band in an electromagnetic spectrum.