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Demonstration of photon Bloch oscillations and Wannier-Stark ladders in dual-periodical multilayer structures based on porous silicon

机译:基于多孔硅的双周期多层结构中光子布洛赫振荡和Wannier-Stark阶梯的演示

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摘要

Theoretical demonstration and experimental evidence of photon Bloch oscillations and Wannier-Stark ladders (WSLs) in dual-periodical (DP) multilayers, based on porous silicon, are presented. An introduction of the linear gradient in refractive indices in DP structure, which is composed by stacking two different periodic substructures N times, resulted in the appearance of WSLs. Theoretical time-resolved reflection spectrum shows the photon Bloch oscillations with a period of 130 fs. Depending on the values of the structural parameters, one can observe the WSLs in the near infrared or visible region which may allow the generation of terahertz radiation with a potential applications in several fields like imaging.
机译:提出了基于多孔硅的双周期(DP)多层膜中光子布洛赫振荡和Wannier-Stark阶梯(WSL)的理论证明和实验证据。通过将两个不同的周期性子结构堆叠N次而构成的DP结构中折射率的线性梯度的引入导致WSL的出现。时间分辨的理论反射光谱显示光子布洛赫振荡的周期为130 fs。根据结构参数的值,可以在近红外或可见光区域观察WSL,这可能会产生太赫兹辐射,并在成像等多个领域具有潜在的应用前景。

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