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arXiv 1209.2280physics.optics
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全固态光子带隙光纤的芯模作为连续介质中的束缚态

The core modes of all solid photonic band gap fibers as bound states in the continuum

Andrey D. Pryamikov

摘要:

本文提出了一种新的全固态光子带隙光纤的面外带隙形成假说。首先,考虑了包层中单个介质棒连续模谱激发的结果,即芯模的形成过程。结果表明,只要满足传播常数的相位匹配条件,纤芯模可以看作是从连续介质中解耦出来的一组辐射模的横向共振。将全固态光子带隙光纤中芯模的形成与光子学中连续介质中束缚态的形成进行类比。基于这些结论,可以解释具有无序包层结构的全固态光子带隙光纤的导光特性和小折射率(1%)全固态光子带隙光纤准三维光子带隙的形成。

英文摘要:

In this paper we propose a new hypothesis of out of plane band gap formation in all solid photonic band gap (PBG) fibers. At first, one considers the process of the core modes formation as a result of excitation of continuous mode spectrum of single dielectric rod of the cladding. It is shown that the core modes can be considered as transverse resonance of a set of the radiation modes decoupled from the continuum provided that the phase matching condition for the propagation constants are fulfilled. An analogy between the core mode formation in all solid PBG fibers and formation of bound states in the continuum in photonics are drawn. Based on these conclusions, the light guiding in all solid PBG fiber with disordered cladding structure and quasi 3D photonic band gap formation in all solid PBG fibers with a small index (1%) can be explained.

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