Reducing the losses of optical metamaterials

Fang, Anan

doi:10.2172/1037879

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Basic Theoretical Issues That Are Still Unclear1

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2018

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References 119 publications

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“…In addition, one intuitively expects that stability and causality are somehow connected. However, at the moment it is not even clear whether Kramers-Kronig relations can always be applied for testing the causality of active metamaterials or not [87,88]. The problem is the well-known prerequisite for the use of Kramers-Kronig Fig.…”

Section: Basic Theoretical Issues That Are Still Unclearmentioning

confidence: 99%

First ten years of active metamaterial structures with “negative” elements

Hrabar

2018

EPJ Appl. Metamat.

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Almost ten years have passed since the first experimental attempts of enhancing functionality of radiofrequency metamaterials by embedding active circuits that mimic behavior of hypothetical negative capacitors, negative inductors and negative resistors. While negative capacitors and negative inductors can compensate for dispersive behavior of ordinary passive metamaterials and provide wide operational bandwidth, negative resistors can compensate for inherent losses. Here, the evolution of aforementioned research field, together with the most important theoretical and experimental results is reviewed. In addition, some very recent efforts that go beyond idealistic impedance negation and make use of inherent non-ideality, instability, and non-linearity of realistic devices, are highlighted. Finally, a very fundamental, but still unsolved issue of common theoretical framework that connects causality, stability, and non-linearity of networks with negative elements is stressed.

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Section: Basic Theoretical Issues That Are Still Unclearmentioning

confidence: 99%

First ten years of active metamaterial structures with “negative” elements

Hrabar

2018

EPJ Appl. Metamat.

View full text Add to dashboard Cite

show abstract

Reducing the losses of optical metamaterials

Cited by 1 publication

References 119 publications

First ten years of active metamaterial structures with “negative” elements

First ten years of active metamaterial structures with “negative” elements

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