Photonic crystal all-optical d-type flip-flop

A photonic crystal (PhC) all-optical D-type flip-flop, wherein said PhC all-optical D-type flip-flop, comprising:

• an optical switch unit, a PhC structure unit, a wave absorbing load and a reference-light source;
• said PhC structure unit includes two signal-input ends, a signal-output end and an idle port;
• a first port of said PhC structure unit is a clock signal-input port, and said clock signal-input port is connected with a clock control signal CP;
• a second port of the PhC structure unit is an intermediate signal-input port, said intermediate signal-input end is connected with a first intermediate signal-output end of said optical selector switch;
• a logic signal D is connected with the first signal-input end of said optical switch unit;
• said absorbing load is connected with a second intermediate signal-output end of the optical switch unit;
• said reference-light source is connected with a second signal-input end of the optical switch unit;
• said second signal-input end is a reference-light input end, said reference-light input end is connected with the output end of said reference-light source.