Other

Shenzhen University

Zhengbiao Ouyang

Quanqiang Yu

Xin Jin

Guohua Wen

Chunchao Qi

Qiong Wang

Hao Huang

Zhiliang Chen

Jingjing Wang

Zhenyu Lei

A metal-insulator-metal (MIM) high-sensitivity plasmon polariton (SPP) terahertz wave detector includes a rectangular cavity, an absorption cavity, a silver block, two waveguides, three metal films, a terahertz probe light, a signal light, and an opto-electric detector; the terahertz probe light is located at an upper end of the rectangular cavity; the rectangular cavity is located at an input end of the terahertz probe wave; and the absorption cavity is connected with a first waveguide; the silver block is disposed within the first waveguide, and is movable; and the first waveguide is connected with a second waveguide.

Metal-insulator-metal high-sensitivity surface plasmon polariton terahertz wave detector

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.

Photonic crystal all-optical multistep-delay self-or-transformation logic gate

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 Xand a second logic-signal X; 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.

Photonic crystal all-optical or-transformation logic gate

A photonic crystal (PhC) all-optical self-OR-transformation logic gate, which comprises an optical-switch unit (OSU), a PhC structure unit, a reference-light source, a memory or delayer and a D-type flip-flop (DFF); an input port of a delayer is connected with a logic-signal X, and an output port of said delayer is connected with the logic-signal-input port of said OSU; a reference light is connected to the reference-light-input port of said OSU; two intermediate-signal-output ports of said OSU are respectively connected with the two intermediate-signal-input port of said PhC-structure unit; a clock-signal CP is connected to the clock-signal-CP-input port of said OSU and the second clock-signal-input port of said DFF; the signal-output port of said PhC-structure unit is connected with the D-signal input port of said DFF. The structure of the present invention is compact in structure, strong in anti-interference capability and ease in integration with other optical-logic elements.

Photonic crystal all-optical self-or-transformation logic gate

The present invention discloses a 2D square-lattice PhC based on cross rods and rotated hollow square rods, comprising a high-refractive-index dielectric rod, a cross plate dielectric rod and a low-refractive-index background dielectric rod; the unit cell of the square-lattice PhC includes a high-refractive-index rotated hollow square rod, a cross plate dielectric rod and a background dielectric; the hollow square rod has an outer contour which is a first rotated square rod with the rotated angle &#x3b1; of 45&#xb0; to 65&#xb0; and the side length b of 0.6 a to 0.75 a, and a hollow part with a cross section being a second rotated square rod with the rotated angle &#x3b2; of 25&#xb0; to 50&#xb0; and the side length c of 0.33 a to 0.5 a; the first rotated square rod is connected with the cross plate dielectric rod, plate dielectric rods of which in the horizontal and vertical directions have different widths.

Two-dimensional square-lattice photonic crystal based on cross rods and rotated hollow square rods

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.

Photonic crystal memory type all-optical 'AOR' logic gate

A two-dimensional (2D) square-lattice photonic crystal (PhC) based on a circular hollow dielectric cylinder and flat dielectric cylinders include a high-refractive-index dielectric cylinder and a low-refractive-index dielectric background, the PhC structure is formed by arranging unit cells in a square-lattice; one lattice constant of the square-lattice PhC is a; each unit cell includes a circular hollow dielectric cylinder and flat dielectric cylinders; and the circular hollow dielectric cylinder is connected to four flat dielectric cylinders; a width D of the flat dielectric cylinder is 0.01a to 0.2a, an outer diameter R of the circular hollow dielectric cylinder is 0.1a to 0.5a, and a ratio T of a difference between an inner diameter and an outer diameter of the circular hollow dielectric cylinder to the outer diameter of the circular hollow dielectric cylinder is 0.01 to 0.99.

2D square lattice photonic crystal based on hollow cylinder and connecting plates

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.

High-contrast photonic crystal 'and' logic gate

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.

Photonic crystal all-optical anti-interference self-locking trigger switch

An optical clock generator includes a nonlinear cavity unit, a cross-waveguide logic gate unit and a delayer unit; and is of a six-port photonic crystal structure including two reference-light signal-input ports, a feedback-signal-input port, a system-signal and feedback-signal output port and two idle ports; the output port of the cross-waveguide logic gate unit is connected with the input port of the nonlinear cavity unit whose system-signal output port is connected with the input port of said delayer unit whose output port is connected with the input port of the cross-waveguide logic gate unit, the system-signal output port is connected with a two-branch waveguide one of which is used as the system-signal output port, and another is used as the feedback-signal output port and connected to an input port of said delayer unit, the delayer unit performs time delay on an input signal and outputs the signal to the feedback-signal-input port.

Optical clock generator

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, and an output port of the memory is connected with the delay-signal-input port of the OSU; a second logic-signal Xis 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.

Photonic crystal all-optical multistep-delay and-transformation logic gate

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.

Photonic crystal all-optical multistep-delay self-AND-transformation logic gate

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.

Photonic crystal all-optical self-and-transformation logic gate

A right-angle bending waveguide includes a circular-hole-type square-lattice photonic crystal (PhC) and a single compensation scattering rod having a low refractive index. The right-angle bending waveguide is a PhC formed from first dielectric rods having a low refractive index arranged in a background dielectric having a low refractive index according to a square lattice. In the PhC, one row and one column of the first dielectric rods having a high refractive index are removed to form the right-angle bending waveguide. A second dielectric rod having a high refractive index is arranged at a corner of the right-angle bending waveguide. The second dielectric rod is the compensation scattering rod or an air hole. The first dielectric rods are circular rods having the low refractive index or air holes. The right-angle bending waveguide having the circular-hole-type square-lattice PhC and the single compensation scattering rod having the low refractive index has extremely low reflectance and a very high transmission rate, facilitates large-scale optical path integration, and provides a broader space for PhC application.

Right-angle waveguide having circular-cylinder-type square-lattice photonic crystal and single compensation scattering cylinder having low reference index

A photonic crystal all-optical D-type flip-flop includes an optical switch unit, a photonic crystal structure unit including two signal-input ends, a signal-output end and an idle port, a wave absorbing load and a reference-light source; the clock signal-input port of the photonic crystal structure unit is connected with a clock control signal; a second port of the photonic crystal structure unit is an intermediate signal-input port, said intermediate signal-input end of the photonic crystal structure unit is connected with a first intermediate signal-output end of the optical selector switch; a logic signal is connected with the first signal-input end of the optical switch unit; the 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, which is a reference-light input end connecting with the output end of said reference-light source.

Growing community of inventors

Guangdong, China

Zhengbiao Ouyang