Enhanced Incidence Angle Based Spectrum Tuning by Using One-Dimensional Ternary Photonic Band Gap Structures

Abstract

This paper demonstrates a novel way to enhance the incident angle based output spectrum tuning in one-dimensional (1D) photonic band gap (PBG) material by using a ternary periodic structure (i.e., three material layers constituting a period of lattice). The incidence angle sensitive wavelength band shift of binary periodic structure was significantly enhanced when the structure was modified to ternary periodic structure by sandwiching a thin new material layer between every two layers, constituting a period of lattice. When the thickness of sandwiched layer was increased, further enhancement in tunable wavelength band shift was observed. These 1D ternary PBG structures can be substituted in place of 1D binary PBG structures for enhancing the tuning performance of optical filters.