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Optical logic device based on rudin-shapiro photonic crystals

A technology of photonic crystals and logic devices, applied in the field of all-optical communication, can solve problems such as reducing the threshold of optical bistability

Pending Publication Date: 2021-11-23
HUBEI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The optical Kerr effect is proportional to the localized electric field, therefore, a strong localized electric field can enhance the third-order nonlinear optical effect of the material, thereby lowering the threshold of optical bistability

Method used

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  • Optical logic device based on rudin-shapiro photonic crystals
  • Optical logic device based on rudin-shapiro photonic crystals
  • Optical logic device based on rudin-shapiro photonic crystals

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Embodiment Construction

[0023] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0024] Mathematically, the iteration rule of Rudin-Shapiro (Rudin-Shapiro: RS) sequence is: S 0 = H, S 1 =HH,S 2 =HHHL,S 3 =HHHLHHLH,...,S N = S N-1 (HH→HHHL, HL→HHLH, LH→LLHL, LL→LLLH), ..., where N (N=0, 1, 2, 3, ...) represents the serial number of the sequence, S N Represents the Nth item of the sequence, HH→HHHL represents the S N-1 Replace HH in HHHL with HHHL.

[0025] figure 1 Shown is a composite structure diagram of a binary RS photonic crystal with sequence number N=3 and graphene. Two binary RS photonic crystals are distributed symmetrically about the origin, which can be expressed as: HHHLHHLHHLHHLHHH, where the letters H and L represent two kinds of uniform dielectric sheets with different high and lo...

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Abstract

The invention provides an optical logic device based on rudin-shapiro photonic crystals, and belongs to the technical field of all-optical communication. The optical logic device comprises two symmetrically-distributed binary RS photonic crystals and two graphene single layers, each binary RS photonic crystal comprises a plurality of first dielectric layers and a plurality of second dielectric layers, the first dielectric layers are marked as H, the second dielectric layers are marked as L, the graphene single layers are marked as G, the binary RS photonic crystals are represented as HHHLHHLH, the optical logic device is represented as HHHLHHLH1GH2H2GH1LHHLHHH, wherein H1GH2 and H2GH1 both represent a three-layer structure formed by embedding the graphene single layer into the first dielectric layer, the thickness of the first dielectric layer and the thickness of the second dielectric layer are respectively 1 / 4 of the respective optical wavelength, and the first dielectric layer and the second dielectric layer are respectively two uniform dielectric sheets with different refractive indexes. The optical logic device has the advantages of low judgment threshold and the like.

Description

technical field [0001] The invention belongs to the technical field of all-optical communication, and relates to an optical logic device based on Rudin-Shapino photonic crystals. Background technique [0002] In all-optical communication, information needs to be stored, transmitted, relayed, judged, timed, amplified, and shaped in the optical domain, which requires vigorous development of all-optical devices that control light. Logic is one of the important categories. Optical bistability is a nonlinear optical effect based on the optical Kerr effect of materials. When the incident light is strong enough, one input light intensity value can correspond to two different output light intensity values, that is, one incident light intensity value can induce two stable resonant output states. [0003] When the optical bistable state is applied to the optical logic device, the upper and lower thresholds of the bistable state correspond to the decision thresholds of logic 1 and lo...

Claims

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Application Information

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IPC IPC(8): G02F3/02G02B1/00
Inventor 方明
Owner HUBEI UNIV OF SCI & TECH
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