We demonstrate a quasi-periodic structure exhibiting multiple photonic band gaps (PBGs) based on submicron-period poled lithium niobate (LN).The structure consists of two building blocks,each containing a pair of antiparallel poled domains,arranged as a Fibonacci sequence.The gap wavelengths are analyzed with the Fibonacci sequence parameters such as the quasiperiodic indices and the average lattice parameter.The transmission properties are investigated by a traditional 4×4 matrix method.It has also been proved that the gap depth can be tuned by the lengths of poled domains.
