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Fano resonator for two-dimensional triangular crystal lattice photon

A technology of two-dimensional photonic crystals and triangular lattices, applied in light guides, optics, instruments, etc., can solve problems such as low extinction ratio, and achieve the effect of improving extinction ratio and quality

Active Publication Date: 2019-11-12
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a triangular lattice two-dimensional photonic crystal Fano resonator, which solves the problem of low extinction ratio and reduces the difference between the peak wavelength and the valley wavelength

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  • Fano resonator for two-dimensional triangular crystal lattice photon
  • Fano resonator for two-dimensional triangular crystal lattice photon
  • Fano resonator for two-dimensional triangular crystal lattice photon

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Embodiment Construction

[0021] A number of embodiments of the present invention will be disclosed in the following figures. For the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, for the sake of simplifying the drawings, some well-known and commonly used structures and components will be shown in a simple schematic manner in the drawings.

[0022] In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention. ...

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Abstract

The invention discloses a Fano resonator for a two-dimensional triangular crystal lattice photon. The resonator is composed of a photonic crystal cavity and a photonic crystal waveguide designed withreflection elements. The cavity structure produces discrete states required for Fano resonance, while the photonic crystal waveguide designed with reflection elements produces continuous states required for Fano resonance; the cavity structure and the photonic crystal waveguide are coupled to produce an asymmetric Fano resonance line shape. The Fano resonance produced by the invention has an extinction ratio of up to 55 dB, and the difference between a peak value and a valley value of the Fano resonance is only 1.4 nm, and also has a high Q value and a low insertion loss. The Fano resonator for the two-dimensional triangular crystal lattice photon is applied to basic photonic devices such as photoswitches, photon sensors and filters in photonic integration.

Description

technical field [0001] The invention belongs to the field of two-dimensional photonic crystal devices, in particular to a triangular lattice two-dimensional photonic crystal Fano resonator. Background technique [0002] The Fano resonance phenomenon is an asymmetric resonance line shape discovered by Ugo Fano in 1961 when he studied the scattering of atomic particles in quantum mechanics. The principle of Fano resonance is the coupling of discrete state and continuous state. With the further research on Fano resonance, it is found that Fano resonance not only appears in quantum systems, but also asymmetric Fano line shapes widely appear in optical systems. Compared with the traditional Lorentzian resonance lineshape, the Fano resonance lineshape can change the transmission characteristics sharply in a narrow wavelength range. Therefore, Fano resonance can be widely used in photonic devices such as optical switches, photonic sensors, and filters. [0003] Two-dimensional p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/122
CPCG02B6/1225
Inventor 陈兵陈德媛夏雨
Owner NANJING UNIV OF POSTS & TELECOMM
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