Photonic devices having Al.sub.1-xSc.sub.xN and Al.sub.yGa.sub.1-yN materials, where Al is Aluminum, Sc is Scandium, Ga is Gallium, and N is Nitrogen and where 0<x≤0.45 and 0≤y≤1.

A PhC all-optical multistep-delay self-AND-transformation logic gate comprising PhC structure unit, an optical switch unit, a memory or delayer, a wave absorbing load, a D-type flip-flop unit and a NOT logic gate; an logic-signal is connected with the input port of a two-branch waveguide whose two output ports are respectively connected with the memory input port and the logic-signal input port of the optical switch unit; two intermediate-signal output port of the optical switch unit are respectively connected with the intermediate-signal input port of the PhC structure unit and said wave absorbing load; a clock-signal CP is connected with the input port of a three-branch waveguide whose three output ports are respectively connected with the NOT logic-gate input port, the first clock-signal input port of the PhC structure unit, and the second clock-signal input port of the optical switch unit.

A photonic crystal (PhC) all-optical OR-transformation logic gate, which comprises an optical-switch unit (OSU), a PhC-structure unit, a reference light, a wave-absorbing load (WAL) and a D-type flip-flop (DFF) unit; two system-signal-input ports are respectively connected with a first logic-signal X.sub.1 and a second logic-signal X.sub.2; the reference light is connected with the reference-light-input port of the OSU; three intermediate-signal-output ports are respectively connected with two intermediate-signal-input ports of the PhC-structure unit and the WAL; a clock-signal CP through the input port of a two-branch waveguide are respectively connected with a first clock-signal CP input port of the OSU and a second clock-signal-CP-input port of the DFF unit; the signal-output port of the PhC-structure unit is connected with the D-signal-input port of the DFF unit. The structure of the present invention is compact in structure, strong in anti-interference capability and ease of integration with other optical-logic elements.

A PhC all-optical multistep-delay self-OR-transformation logic gate including an optical switch unit, a PhC structure unit, a reference-light, a memory or delayer, a D-type flip-flop unit and a wave absorbing load; a logic signal X is connected to the input port of a two-branch waveguide whose two output ports are respectively connected with the input port of the memory and the logic-signal input port of the optical switch unit; the output port of the memory is connected with the delay-signal input port of the optical switch unit; the reference-light source is connected with the reference-light input port of the optical switch unit whose three intermediate-signal output ports are respectively connected with the first and second intermediate-signal input ports of the PhC structure unit and the wave absorbing load; and the output port of the PhC structure unit is connected with the D-signal input port of the D-type flip-flop unit.

The present invention discloses a photonic crystal (PhC) all-optical multistep-delay AND-transformation logic gate, which comprises a PhC-structure unit, an optical-switch unit (OSU), a wave-absorbing load, a NOT-logic gate, a D-type flip-flop (DFF) and a memory or delayer; an input port of a memory is connected with a first logic-signal X.sub.1, and an output port of the memory is connected with the delay-signal-input port of the OSU; a second logic-signal X.sub.2 is connected with the logic-signal-input port of the OSU; two intermediate-signal-output ports of the OSU are respectively the intermediate-signal-input port of the PhC-structure unit and the wave-absorbing load; a clock-signal CP is connected with the input port of a three-branch waveguide; the signal-output port of the PhC-structure unit is connected with the D-signal-input port of the DFF unit. The structure of the present invention is compact in structure and ease of integration with other optical-logic elements.

The present invention discloses a high-contrast photonic crystal AND logic gate, comprising a five-port two-dimensional photonic crystal, a nonlinear cavity unit and a Y-shape AND logic gate unit; and it includes a reference-light input port, two signal-input ports, a system signal-output port and an idle port; the nonlinear cavity unit is coupled with the Y-shape AND logic gate unit. The structure of the present invention, which is compact in structure and ease of integration with other optical logic elements, not only can realize the functions of the high-contrast photonic and logic gate, but also has high contrast of high and low logic output; and is widely applicable to optical communication bands.

The present invention discloses a PhC all-optical self-AND-transformation logic gate, which comprises an optical-switch unit, a PhC-structure unit, a NOT-logic gate and a D-type flip-flop unit; said clock-signal CP is connected with an input port of the two-branch waveguide, said two output ports of the two-branch waveguide are respectively connected with the input port of said NOT-logic gate and a first clock-signal-input port of said PhC-structure unit; the output port of said NOT-logic gate is connected with the second clock-signal-input port of said D-type flip-flop unit; the signal-output port of the PhC structure is connected with the D-signal-input port of said D-type flip-flop unit; a logic-signal X is connected with the logic-signal-input port of said PhC-structure unit. The structure of the present invention is compact in structure and ease of integration with other optical-logic elements.

The present invention discloses a photonic crystal (PhC) all-optical AND-transformation logic gate, which comprises a PhC-structure unit, an optical-switch unit, a wave-absorbing load, a NOT-logic gate and a D-type flip-flop; two intermediate-signal output ports of the optical-switch unit are respectively connected with the intermediate-signal input port and the wave-absorbing load of the PhC-structure unit; a clock-signal CP input port is connected with three-branch waveguide, and three output ports are respectively connected with first clock-signal CP input port of the optical-switch unit, second clock-signal CP input port of the PhC-structure unit and the NOT-logic-gate input port; the NOT-logic-gate output port is connected with third clock-signal CP input port of the D-type flip-flop; the signal-output port of the PhC-structure unit is connected with the D-signal input port of the D-type flip-flop. The structure of the present invention is compact in structure and ease of integration with other optical-logic elements.

The present invention discloses a photonic crystal memory type all-optical “AOR” logic gate, and including photonic crystal structure; the photonic crystal structure includes two input ports, an output port and an idle port; a first input end and a second input end of the photonic crystal structure are respectively connected with a signal A and a signal B. The present invention has the advantages in high contrast of high and low logic output, high in computing speed, strong in anti-interference capability, and ease of integration with other optical logic elements.

The present invention discloses a photonic crystal all-optical anti-interference self-locking trigger switch which includes a photonic crystal structure unit, an optical switch, an absorbing load and an internal or external reference light source, wherein said photonic crystal structure unit includes two signal-input ends, a signal-output end; a first input end of said photonic crystal structure unit is connected to a logic signal X; the input end of the optical switch is connected with the reference light source, the first intermediate signal-output end of the optical switch is connected with the second input end of the photonic crystal structure unit, and the second intermediate signal-output end of the optical switch is connected with the wave absorbing load. The present invention has the advantages of high contrast of high and low logic output, high computing speed, strong anti-interference capability, and ease of integration with other optical logic elements.