An ultra-thin chiral metamaterial absorber with high selectivity for LCP and RCP waves

Li, Minhua; Guo, Linyan; Dong, Jianrong; Yang, Helin

doi:10.1088/0022-3727/47/18/185102

Cited by 85 publications

(56 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[27][28][29][30][31][32][33][34][35] (polarization transformations), Refs. [36][37][38][39][40][41][42] (absorption), and Refs. [43][44][45][46][47][48][49][50][51][52][53][54][55][56] (wavefront manipulations).…”

Section: Introductionmentioning

confidence: 99%

Design, concepts, and applications of electromagnetic metasurfaces

2018

View full text Add to dashboard Cite

Abstract:The paper overviews our recent work on the synthesis of metasurfaces and related concepts and applications. The synthesis is based on generalized sheet transition conditions (GSTCs) with a bianisotropic surface susceptibility tensor model of the metasurface structure. We first place metasurfaces in a proper historical context and describe the GSTC technique with some fundamental susceptibility tensor considerations. On this basis, we next provide an in-depth development of our susceptibility-GSTC synthesis technique. Finally, we present five recent metasurface concepts and applications, which cover the topics of birefringent transformations, bianisotropic refraction, light emission enhancement, remote spatial processing, and nonlinear second-harmonic generation.

show abstract

Section: Introductionmentioning

confidence: 99%

Design, concepts, and applications of electromagnetic metasurfaces

2018

View full text Add to dashboard Cite

show abstract

“…Subsequently, an example of such a symmetric and polarization-sensitive absorber has been reported in Ref. [24], providing absorption only for one circular polarization (50% of incident power).…”

Section: Introductionmentioning

confidence: 99%

Broadband Reflectionless Metasheets: Frequency-Selective Transmission and Perfect Absorption

et al. 2015

View full text Add to dashboard Cite

Energy of propagating electromagnetic waves can be fully absorbed in a thin lossy layer, but only in a narrow frequency band, as follows from the causality principle. On the other hand, it appears that there are no fundamental limitations on broadband matching of thin resonant absorbing layers. However, known thin absorbers produce significant reflections outside of the resonant absorption band. In this paper, we explore possibilities to realize a thin absorbing layer that produces no reflected waves in a very wide frequency range, while the transmission coefficient has a narrow peak of full absorption. Here we show, both theoretically and experimentally, that a thin resonant absorber, invisible in reflection in a very wide frequency range, can be realized if one and the same resonant mode of the absorbing array unit cells is utilized to create both electric and magnetic responses. We test this concept using chiral particles in each unit cell, arranged in a periodic planar racemic array, utilizing chirality coupling in each unit cell but compensating the field coupling at the macroscopic level. We prove that the concept and the proposed realization approach also can be used to create nonreflecting layers for full control of transmitted fields. Our results can have a broad range of potential applications over the entire electromagnetic spectrum including, for example, perfect ultracompact wave filters and selective multifrequency sensors.

show abstract

“…In contrast, in metamaterials, they can be many orders of magnitude larger [1][2][3][4][5][6][7][8] and can also be tuned to desired operation wavelengths. The status has been reviewed in [9].…”

Section: Introductionmentioning

confidence: 99%

Tapered N-helical metamaterials with three-fold rotational symmetry as improved circular polarizers

Kaschke¹,

Blome²,

Burger³

et al. 2014

Opt. Express

View full text Add to dashboard Cite

Abstract:Chiral helix-based metamaterials can potentially serve as compact and broadband circular polarizers. We have recently shown that the physics of structures composed of multiple intertwined helices, so called N-helices with N being an integer multiple of 4, is distinct from that of structures made of single circular helices (N = 1). In particular, undesired circular polarization conversion is strictly eliminated for N = 4 helices arranged on a square lattice. However, the fabrication of such structures for infrared/visible operation wavelengths still poses very significant challenges. Thus, we here revisit the possibility of reducing N from 4 to 3, which would ease micro-fabrication considerably. We show analytically that N = 3 helices arranged on a hexagonal lattice exhibit strictly vanishing circular polarization conversion. N = 3 is the smallest option as N = 2 obviously leads to linear birefringence. To additionally improve the circular-polarizer operation bandwidth and the extinction ratio while maintaining high transmission for the wanted polarization and zero conversion, we also investigate by numerical calculations N = 3 helices with tapered diameter along the helix axis. We find operation bandwidths as large as 2.4 octaves.

show abstract

An ultra-thin chiral metamaterial absorber with high selectivity for LCP and RCP waves

Cited by 85 publications

References 33 publications

Design, concepts, and applications of electromagnetic metasurfaces

Design, concepts, and applications of electromagnetic metasurfaces

Broadband Reflectionless Metasheets: Frequency-Selective Transmission and Perfect Absorption

Tapered N-helical metamaterials with three-fold rotational symmetry as improved circular polarizers

Contact Info

Product

Resources

About