Photonic crystal resonant cavity and photonic crystal optical fiber based on Dirac point

Abstract

The invention discloses a photonic crystal resonant cavity and a photonic crystal optical fiber based on a Dirac point. The photonic crystal resonant cavity and the photonic crystal optical fiber based on the Dirac point are characterized in that the mutual effect between two-dimensional local area modes supported by the photonic crystal resonant cavity and the photonic crystal optical fiber based on the Dirac point is in long range, the local area mode intensity is attenuated in space according to the power function r-3 / 2 of the distance, phases of the modes are jumped between two states, the phase characteristic of a standing wave is displayed, a quality factor of the modes is linearly increased along with the area of the resonant cavity, when the absorption of the materials is not considered, the size of the resonant cavity can be increased so as to improve the quality factors of the modes without limit, and meanwhile, the modes do not only exist in the Dirac frequency and further exist in other frequencies within a certain range surrounding the Dirac frequency.

Description

technical field [0001] The invention relates to a photonic crystal energy band structure, a resonant cavity and a waveguide technology, in particular to a novel photonic crystal resonant cavity and a photonic crystal fiber formed based on the photonic crystal Dirac point. Background technique [0002] Photonic crystal resonators and photonic crystal fibers can be formed by relying on the photonic crystal photonic bandgap to suppress the divergence of light. An important application of photonic crystals is the construction of optical resonators and waveguides. Optical resonators and waveguides are important basic units of modern photonics systems. Integrated optical modules such as micro lasers, couplers, filters, and power splitters can be formed through the combination of basic components such as resonators and waveguides. The way of combination determines the interaction characteristics between the combination units, and then determines the function of the integrated opti...

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Problems solved by technology

Unlike the one-dimensional localized mode, it is generally believed that the two-dimensional localized mode can only exist in a complete band gap, because as long as there is no suppression of the band gap in any direction, the energy of the localized mode may leak out from that direction , so scholars engaged in optical research believe that there is no complete band gap near the Dirac frequency, and the two-dimensional localized mode at this frequency is impossible to exist

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