Mitigating optical singularities in coordinate-based metamaterial waveguides

Viaene, Sophie; Ginis, Vincent; Danckaert, Jan; Tassin, Philippe

doi:10.1103/physrevb.95.155412

Cited by 5 publications

(3 citation statements)

References 55 publications

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“…This results in bulky structures that are difficult to fabricate. However, if one also varies the thickness of the waveguide, it is possible to transform guided waves in waveguides where the core is made of a metamaterial, but the cladding is left unaltered [63,64]. The thickness variation is engineered such that the dispersion relation is unaltered before and after the transformation.…”

Section: Chalmers University Of Technology and Vrije Universiteit Bru...mentioning

confidence: 99%

“…For the design of guided wave devices, as visualized in figure 13, the theory of transformation optics is now well understood [62][63][64], but advances in nanofabrication are clearly required. Surface transformation-optical designs require an anisotropic dielectric material layer with varying height.…”

Section: Chalmers University Of Technology and Vrije Universiteit Bru...mentioning

confidence: 99%

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Roadmap on transformation optics

McCall¹,

Pendry²,

Galdi³

et al. 2018

J. Opt.

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Transformation Optics asks Maxwell's equations what kind of electromagnetic medium recreate some smooth deformation of space. The guiding principle is Einstein's principle of covariance: that any physical theory must take the same form in any coordinate system. This requirement fixes very precisely the required electromagnetic medium. The impact of this insight cannot be overestimated. Many practitioners were used to thinking that only a few analytic solutions to Maxwell's equations existed, such as the monochromatic plane wave in a homogeneous, isotropic medium. At a stroke, Transformation Optics increases that landscape from 'few' to 'infinity', and to each of the infinitude of analytic solutions dreamt up by the researcher, corresponds an electromagnetic medium capable of reproducing that solution precisely. The most striking example is the electromagnetic cloak, thought to be an unreachable dream of science fiction writers, but realised in the laboratory a few months after the papers proposing the possibility were published. But the practical challenges are considerable, requiring meta-media that are at once electrically and magnetically inhomogeneous and anisotropic. How far have we come since the first demonstrations over a decade ago? And what does the future hold? If the wizardry of perfect macroscopic optical invisibility still eludes us in practice, then what compromises still enable us to create interesting, useful, devices? While 3D cloaking remains a significant technical challenge, much progress has been made in 2dimensions. Carpet cloaking, wherein an object is hidden under a surface that appears optically flat, relaxes the constraints of extreme electromagnetic parameters. Surface wave cloaking guides subwavelength surface waves, making uneven surfaces appear flat. Two dimensions is also the setting in which conformal and complex coordinate transformations are realisable, and the possibilities in this restricted domain do not appear to have been exhausted yet. Beyond cloaking, the enhanced electromagnetic landscape provided by Transformation Optics has shown how fully analytic solutions can be found to a number of physical scenarios such as plasmonic systems used in electron energy loss spectroscopy (EELS) and cathodoluminescence (CL). Are there further fields to be enriched? A new twist to Transformation Optics was the extension to the space-time domain. By applying transformations to space-time, rather than just space, it was shown that events rather than objects could be hidden from view; Transformation Optics had provided a means of effectively redacting events from history. The hype quickly settled into serious nonlinear optical experiments that demonstrated the soundness of the idea, and it is now possible to consider the practical implications, particularly in optical signal processing, of having an 'interrupt-without-interrupt' facility that the socalled temporal cloak provides. Inevitable issues of dispersion in actual systems have only begun to be addressed. Now that time is included in ...

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Section: Chalmers University Of Technology and Vrije Universiteit Bru...mentioning

confidence: 99%

Section: Chalmers University Of Technology and Vrije Universiteit Bru...mentioning

confidence: 99%

Roadmap on transformation optics

McCall¹,

Pendry²,

Galdi³

et al. 2018

J. Opt.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Leveraging transformation optics (TO) 19,209 , integrated metamaterial waveguides can be conceived 129,135,[210][211][212][213] . Figure 4k illustrates the schematic for designing a lowcrosstalk multimode waveguide bend with feasible fabrication constraints using TO 135 , where darker color indicates higher index.…”

Section: Exotic Optical Physicsmentioning

confidence: 99%

Optical meta-waveguides for integrated photonics and beyond

et al. 2021

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The growing maturity of nanofabrication has ushered massive sophisticated optical structures available on a photonic chip. The integration of subwavelength-structured metasurfaces and metamaterials on the canonical building block of optical waveguides is gradually reshaping the landscape of photonic integrated circuits, giving rise to numerous meta-waveguides with unprecedented strength in controlling guided electromagnetic waves. Here, we review recent advances in meta-structured waveguides that synergize various functional subwavelength photonic architectures with diverse waveguide platforms, such as dielectric or plasmonic waveguides and optical fibers. Foundational results and representative applications are comprehensively summarized. Brief physical models with explicit design tutorials, either physical intuition-based design methods or computer algorithms-based inverse designs, are cataloged as well. We highlight how meta-optics can infuse new degrees of freedom to waveguide-based devices and systems, by enhancing light-matter interaction strength to drastically boost device performance, or offering a versatile designer media for manipulating light in nanoscale to enable novel functionalities. We further discuss current challenges and outline emerging opportunities of this vibrant field for various applications in photonic integrated circuits, biomedical sensing, artificial intelligence and beyond.

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A Comprehensive Survey of Silicon Thin-film Solar Cell: Challenges and Novel Trends

ElKhamisy,

Abdelhamid,

El-Rabaie

et al. 2023

Plasmonics

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Solar cells are commonly recognized as one of the most promising devices that can be utilized to produce energy from renewable sources. As a result of their low production costs, little material consumption, and projected increasing trajectory in terms of efficiency, thin-film solar cells have emerged as the technology of choice in the solar industry at present. This study aims to provide a comprehensive review of silicon thin-film solar cells, beginning with their inception and progressing up to the most cutting-edge module made in a laboratory setting. There is a review of the fantastic development of each technology, as well as its cell configuration, restrictions, equivalent circuit model, cell performance, and global market share. The dependability and availability of cell materials, in addition to the comparison of numerous characteristics, are both areas of research that are conducted concurrently for each of the distinct technologies. New advances in solar cells are also highlighted; these hold the potential to be significant variables and solutions in the process of the future's development. This abbreviated and brief version of the comprehensive analysis is provided to readers in the hope that it will aid them in evaluating potential research avenues about the proper applications and production of solar cells.

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Mitigating optical singularities in coordinate-based metamaterial waveguides

Cited by 5 publications

References 55 publications

Roadmap on transformation optics

Roadmap on transformation optics

Optical meta-waveguides for integrated photonics and beyond

A Comprehensive Survey of Silicon Thin-film Solar Cell: Challenges and Novel Trends

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