Enhancement of Photonic Crystal All-Optical Diode Efficiency with a Subwavelength Layer

K. Jamshidi-Ghaleha, Z. Safarib and R. Tanavarc aDepartment of Physics and Research Group of Processing and Communication, Azarbaijan Shahid Madani University, Tabriz, Iran bDepartment of Laser-Optics, University of Bonab, Azarbaijan-e Shargi, Bonab, Iran cSama Technical and Vocational Training College, Islamic Azad University, Tabriz branch, Tabriz, Iran

Full Text PDF

In this paper, the effect of a subwavelength thin layer on all-optical diode action in a one-dimensional photonic crystal is investigated. The photonic multilayer structure is considered as (BA)6 (AB)6 C(AABB)6, where layers A and B are nonlinear and linear materials respectively, and C is a thin layer with positive or negative-index material. The results are shown that by introducing a thin layer with different optical properties the all-optical diode efficiency is controllable. In our numerical results, the transmission contrast of the structure, without the thin layer is obtained as 0.63, with a positive index material layer nearly zero and with a negative index material thin layer about 0.75.

DOI: 10.12693/APhysPolA.123.212 PACS numbers: 42.70.Qs