Photonic Crystal Based Code Converter-Binary to Gray Code

We proposed a two dimensional photonic crystal based 3-bit code converter which converts binary codes to gray codes using hexagonal lattice. Using hexagonal silicon pillars in dual T-shaped waveguides code converter is realized by means of XOR gates. By employing the cascaded layout of XOR logic gates, the output can be arrived by using interference effect. Finite Difference Time Domain methodology is used to design and analyze the performance of the designed code converters. The design renders a contrast ratio of 12.557 dB for the binary to gray code converter with optimized refractive index and silicon rod radius values.