Spatiotemporal cascading of dielectric waveguides [Invited]

IF 2.8 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Express Pub Date : 2024-03-28 DOI:10.1364/ome.516262

Victor Pacheco-Peña and Nader Engheta

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引用次数: 0

Abstract

Photonic time interfaces, as the temporal analogue of spatial interfaces between two media, consist of a rapid change of the electromagnetic properties of a material (such as permittivity, ε, and permeability, μ) while the wave is present in the material. Here we exploit cascading of such time interfaces in spatially cascaded guided-wave structures such as slab waveguides and ring resonators by considering that the relative permittivity of the cladding of dielectric waveguides is rapidly changed at different moments of time from ε_{clad_1} to ε_{clad_2}, while the material of the core remains unchanged in time. It is shown how such time-dependent cladding can enable frequency conversion within the space-time dielectric ring resonator and slab waveguides due to an induced modification of the effective refractive index of the mode propagating within such photonic device. Cascaded frequency conversion is achieved in such cascaded space-time dielectric waveguides and ring resonators, showing how the combination of space and time interfaces can offer further opportunities for manipulation of light-matter interaction using four-dimensional (4D) photonic structures.

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介质波导的时空级联 [特邀]

光子时间界面是两种介质之间空间界面的时间类似物，由材料的电磁特性（如介电常数ε和磁导率μ）的快速变化组成，同时波存在于材料中。在这里，我们利用空间级联导波结构（如板坯波导和环形谐振器）中的这种时间界面级联，考虑到介质波导包层的相对介电常数在不同时刻从εclad_1 快速变化到εclad_2，而核心材料在时间上保持不变。图中展示了这种随时间变化的包层如何在时空介质环谐振器和板坯波导中实现频率转换，这是因为在这种光子器件中传播的模式的有效折射率发生了诱导性改变。在这种级联时空介质波导和环形谐振器中实现了级联频率转换，展示了空间和时间界面的结合如何为利用四维（4D）光子结构操纵光物质相互作用提供更多机会。

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来源期刊

Optical Materials Express MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS

CiteScore

5.50

自引率

3.60%

发文量

377

审稿时长

1.5 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optical Materials Express (OMEx), OSA''s open-access, rapid-review journal, primarily emphasizes advances in both conventional and novel optical materials, their properties, theory and modeling, synthesis and fabrication approaches for optics and photonics; how such materials contribute to novel optical behavior; and how they enable new or improved optical devices. The journal covers a full range of topics, including, but not limited to: Artificially engineered optical structures Biomaterials Optical detector materials Optical storage media Materials for integrated optics Nonlinear optical materials Laser materials Metamaterials Nanomaterials Organics and polymers Soft materials IR materials Materials for fiber optics Hybrid technologies Materials for quantum photonics Optical Materials Express considers original research articles, feature issue contributions, invited reviews, and comments on published articles. The Journal also publishes occasional short, timely opinion articles from experts and thought-leaders in the field on current or emerging topic areas that are generating significant interest.