Resonant splitting in periodic T-shape photonic waveguides

Abstract

Resonant splitting phenomena of photons in periodic T-shape waveguide structure are investigated by the Green's function method. It is found that, except for the (n-1)-fold resonant splitting in the low frequency region, (n-2)-fold resonant splitting occurs in the high frequency region of the transmission spectra. The (n-2)-fold resonant splitting peaks are induced by the high quasi-bound states where the photons are mainly localized in the constrictions rather than in the stubs. To this kind of quasi-bound state, the stub acts as a potential barrier rather than a well, which is the inverse of the case of the low quasi-bound states corresponding to the (n-1)-fold splitting peaks. These resonant peaks can be modulated by adjusting the periodic number and geometry of the waveguide structures.

References in corpus (4)

• Large frequency range of negligible transmission in 1D photonic quantum well structures
• Tunneling mechanism of light transmission through metallic films
• Light propagation in finite and infinite photonic crystals: The recursive Green's function technique
• Polariton Local States in Periodic Bragg Multiple Quantum Well Structures