Applications of the transmitted phase properties of photonic crystals in all-optical switches and logic gates

Abstract

Abstract: By using the transfer matrix method, we studied the phase properties of the transmitted light from one-dimensional photonic crystal coupled-defect structure with the form as (HL)kA(LH)k containing N defects. It is found that for , the transmitted phase curve is nearly linear; while for , the transmitted phase curve is stepwise and changes drastically around each transmitted peak with the corresponding phase-shift one π or so. When introducing nonlinear materials, slight change of refractive index would result in a perfect π phase-transition. Moreover, the transmittance is near zero at the π-phase-transition, which is helpful to reduce the influence by the dynamic chirp. Such phase properties hold great promise in designing various phase devices. Based on these properties, we designed sensitive all-optical switch and logic gate devices as examples here.

Key words: optoelectronics, photonics crystals, transfer matrix method, phase, all-optical switches, logic gates

CLC Number:

O482.3

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