Optical Brewster Metasurfaces Exhibiting Ultrabroadband Reflectionless Absorption and Extreme Angular Asymmetry

Fan, Huiying; Li, Jensen; Lai, Yun; Luo, Jie

doi:10.1103/physrevapplied.16.044064

Cited by 26 publications

(14 citation statements)

References 49 publications

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“…The simulation and experimental results demonstrate successful control of the amplitude, wave front, and polarization. The capability to arbitrarily engineer the anisotropic complex surface conductivity of our proposed metasurface also makes it a promising candidate for functionalities with strong angular asymmetry [29,30].…”

Section: Discussionmentioning

confidence: 99%

Multifunctional Metasurface Architecture for Amplitude, Polarization and Wave-Front Control

et al. 2022

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Section: Discussionmentioning

confidence: 99%

Multifunctional Metasurface Architecture for Amplitude, Polarization and Wave-Front Control

et al. 2022

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“…Hereafter, we refer to a singlelayer metamaterial with finite thickness as a metafilm. So far, the Brewster effect has been investigated in various kinds of metamaterials and metasurfaces [22][23][24][25][26][27][28][29]. As a part of these studies, we showed in our previous papers [30,31] that reflection in a metafilm can be completely suppressed by arranging the meta-atoms so that the oscillation direction of the electric dipole (or magnetic dipole) induced in the meta-atoms coincides with the propagation direction of the reflected wave.…”

Section: Introductionmentioning

confidence: 98%

Broadband Control of Group Delay Using the Brewster Effect in Metafilms

Tamayama

Yamamoto

2022

Phys. Rev. Applied

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We propose and verify a method for controlling the frequency dependence of the group delay of electromagnetic waves over a broad frequency range using the Brewster effect in single-layer metamaterials with finite thickness, here referred to as metafilms. When the metafilm's reflectance vanishes regardless of the incident frequency, the group delay can be large near its resonance frequency while maintaining the transmittance close to unity regardless of the incident frequency. Furthermore, when several reflectionless metafilms are stacked together, the total group delay should be given as the sum of the individual group delays. In this study, we realize reflectionless metafilms by arranging the meta-atoms so that the Brewster effect occurs regardless of the incident frequency. We evaluate in numerical simulations and experiments the frequency dependence of the transmittance and of the group delay of a three-layer metamaterial composed of reflectionless metafilms with different resonance frequencies, and find that the total transmittance and group delay of this metamaterial agree respectively with the product of the transmittances and the sum of the group delays of the constituent metafilms.

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“…In [23], a coherent asymmetric absorber using space-modulated metasurface was theoretically proposed, which behaves as an absorber or as a retro-reflector depending on the angle of incidence by two coherent waves. Three dimensional asymmetric meta-gratings were applied for angularasymmetric transmissions [24]- [25]. Based on the anomalous Brewster effect, a transition between perfect transparency and perfect absorption was achieved under 55.6° and −55.6° oblique incidences [24].…”

Section: Introductionmentioning

confidence: 99%

“…Three dimensional asymmetric meta-gratings were applied for angularasymmetric transmissions [24]- [25]. Based on the anomalous Brewster effect, a transition between perfect transparency and perfect absorption was achieved under 55.6° and −55.6° oblique incidences [24]. Similar meta-grating structure was also used to realize a Janus backscattering mirror that retro-reflects incident waves for one side while showing transparency in the time-reversed reflection channel [25].…”

Section: Introductionmentioning

confidence: 99%

A Dual-band Metasurface with Extreme Angular-Asymmetric Transmission and Frequency Selection Based on Resonant Coupling Effect

Wang¹,

Hu²,

Wang³

et al. 2022

Preprint

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<p>Asymmetric transmission plays an important role in many electromagnetic systems. Different to the asymmetric transmissions in full space, angular-asymmetric transmissions support different characteristics for symmetrical oblique incidences in half space, which has great potentials for antenna designs and wireless systems. This communication designs and demonstrates a dual-band multi-functional metasurface with angular-asymmetric transmission and frequency selection under oblique incidences. At 8.7 GHz, the 30° incident TM wave is bounded in the metasurface, and the −30° incident TM wave transmits, which presents an angular-asymmetric transmission. At 10.4 GHz, both ±30° TM oblique incident waves can be transmitted, which presents a frequency selection function. The metasurface sample with optimized geometry parameters has been fabricated and measured, and the measurement results agree well with the simulation results.</p>

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Optical Brewster Metasurfaces Exhibiting Ultrabroadband Reflectionless Absorption and Extreme Angular Asymmetry

Abstract: If it is the author's pre-published version, changes introduced as a result of publishing processes such as copy-editing and formatting may not be reflected in this document. For a definitive version of this work, please refer to the published version.

Cited by 26 publications

References 49 publications

Multifunctional Metasurface Architecture for Amplitude, Polarization and Wave-Front Control

Multifunctional Metasurface Architecture for Amplitude, Polarization and Wave-Front Control

Broadband Control of Group Delay Using the Brewster Effect in Metafilms

A Dual-band Metasurface with Extreme Angular-Asymmetric Transmission and Frequency Selection Based on Resonant Coupling Effect

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