Design method of ultra-transmissive waveguide based on polarization resonance and Bragg resonance

Abstract

The present invention proposes a design method of an ultra-transmissive waveguide based on polarization resonance and Bragg resonance, and applies the ultra-transmissive waveguide to a surface plasmon waveguide system in which the basic unit consists of nano-scale metal-dielectric-metal waveguides and cyclically aligned laterally coupled resonators. Thus, the chain resonator structure has guide wave and band gap characteristics similar to that of photonic crystals. In the excitation of the single-ended waveguide mode, the waveguide mode is coupled with the lateral coupling resonance mode to modulate the transmission characteristics. In particular, the operating frequency of the waveguide structure can be controlled by the intrinsic frequency of the lateral resonator. The waveguide as a whole can achieve filtering, transmission and super transmission to form a laser state. In addition, the design method utilizes the gain and loss of the resonator to modulate the waveguide transmission characteristics. The design method gives the dispersion relation of the super transmission waveguide based on the coupling mode theory and the Bragg theory, combined with the polarization resonance and the Bragg resonance interaction.

Description

technical field [0001] The invention belongs to the field of micro-nano photonics and electromagnetic metamaterials, and in particular relates to a design method of an optical micro-nano metal-dielectric-metal waveguide that can be used to adjust transmission characteristics. Background technique [0002] The metal-dielectric-metal structure is a very promising micro-nano photonics system, which can effectively break through the traditional optical diffraction limit function, and can effectively confine the light field at the nanometer scale, so it is widely used in the design and license of nanometer Two-stage optical subwavelength devices to realize photonic integrated circuits have become a topic of concern and a scientific research field in recent years. In addition, basic structures such as nano-resonators and interference grooves are embedded in the waveguide structure, which can realize the regulation of transmission mode and optical signal processing. However, due t...

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Problems solved by technology

However, due to the large loss of metal in the visible light and near-infrared frequency bands, the light wave can only transmit a short distance in the metal-dielectric-metal waveguide, and it attenuates quickly, which greatly limits the metal-dielectric-metal waveguide. Practical Application and Fabrication of Dielectric-Metallic Waveguides

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