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

Pitilakis, Alexandros; Seckel, Manuel; Tasolamprou, Anna C.; Liu, F.; Deltsidis, Alexandros; Manessis, D.; Ostmann, A.; Kantartzis, Nikolaos V.; Liaskos, Christos; Soukoulis, Costas M.; Tretyakov, Sergei; Kafesaki, Maria; Tsilipakos, Odysseas

doi:10.1103/physrevapplied.17.064060

Cited by 19 publications

(8 citation statements)

References 27 publications

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“…Metasurface is an artificial plane material with smaller thickness than the wavelength [1]. Metasurfaces have excellent electromagnetic properties beyond the limitation of natural materials [2], which showing a variety of flexible control of parameters such as amplitude [3], phase [4,5], polarization [6], etc. Therefore, due to the application in the spectrum range from terahertz to visible light [7], such as filters [8,9], biosensors [10][11][12][13], perfect absorbing materials [14,15] * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis and prediction of tunable metasurface filter based on electrochemical metallization

Chen,

Wu,

et al. 2024

J. Phys. D: Appl. Phys.

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In this paper, a tunable metasurface filter based on electrochemical metallization is proposed. The finite element method (FEM) is used to simulate the formation and rupture of the conductive filament (CF). The geometric structure of the metasurfaces filter is reconstructed by CF to achieve the purpose of tuning the transmission characteristics of the metasurface. Due to the formation of CF in the gap of separated rectangular gold patches, the proposed metasurface simultaneously exhibits the resonance characteristics of two separated rectangular gold patches and unseparated rectangular gold patches. Numerical calculations show that when the radius of the CF increases from 5 nm to 25 nm, the metasurface shows good tunable filtering characteristics, and its quality factor gradually increases. Finally, in order to solve the problem of consuming a lot of time to design metasurface, a deep neural network (DNN) is used to predict the transmission curves corresponding to different metasurface structures. The results show that the Mean Square Error (MSE) of the training model is less than 1×10-3, which shows superior robustness and generalization, and greatly shortens the time required for design. This design paves a new way to develop optoelectronic devices, such as modulators, sensors and optical switches.

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Section: Introductionmentioning

confidence: 99%

Performance analysis and prediction of tunable metasurface filter based on electrochemical metallization

Chen,

Wu,

et al. 2024

J. Phys. D: Appl. Phys.

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“…[45] Pitilakis et al proposed a trifunctional metasurface that exhibited the functions of perfect absorption, polarization conversion, and beam splitting. [46] However, the functionalities of these metasurfaces are commonly bound to the established structure design. Once the device is fabricated, its polarization control functions are fixed, which is not favorable for adding multiple applications in highly integrated optical systems.…”

Section: Introductionmentioning

confidence: 99%

Modular Design for Versatile Broadband Polarizing Metasurfaces with Freely Switching Functions

Song

Gong

Cao

et al. 2023

Adv Funct Materials

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Polarization is a fundamental property of electromagnetic waves that plays a key role in many physical phenomena and applications. Schemes to manipulate it are revisited with the emergence of metasurfaces, which have brought multi-functionalities straightforwardly. However, this has come at the expense of design complexity that relies strongly on field theory. Here, an ingenious strategy of modular design is proposed to construct subwavelength multifunctional polarization control devices. Chiral metasurfaces with different handedness are first proposed and regarded as modules. The versatile polarization controller can thus be obtained with the combination of different modules. These experiments demonstrate that the well-designed polarization controller possesses reconfigurable functionality, and various broadband polarization and amplitude regulation functions with high efficiency including arbitrary linear polarization rotation, asymmetric transmission effect, neutraldensity-like filter, polarization beam splitter, etc., can be readily realized just by changing the cascaded modules. The physical mechanisms of the versatile polarization controller and chiral metasurface modules are both guaranteed by the Fabry-Pérot-like resonances, which are theoretically verified via the transfer matrix method. It is envisioned that the modular concept will be of great benefit to designing compact multifunctional polarization controllers.

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“…The outcome of the aforementioned technique is a reduction in losses, and it has been previously employed in structures incorporating piezoelectric actuators [ 36 ] and electronic components. [ 50 ] Based on the piezoelectric mechanism's properties, the ground plane's position can be controlled precisely (in the order of nm) with a switching speed in the order of milliseconds. Additionally, we can bring the ground plane in contact with the periodic structure and separate them dynamically (i.e., continuously) up to a maximum displacement/separation of 0.5 mm.…”

Section: Introductionmentioning

confidence: 99%

“…The outcome of the aforementioned technique is a reduction in losses, and it has been previously employed in structures incorporating piezoelectric actuators [36] and electronic components. [50] Based on the piezoelectric mechanism's properties, the ground plane's position can be controlled precisely (in the order of nm) with a Figure 1. A schematic of the proposed piezoelectric-actuator-controlled reflection metasurface polarizer.…”

Section: Introductionmentioning

confidence: 99%

Multifunction Tunable Piezoelectric‐Actuated Metasurface at Millimeter‐Waves

Vassos

Feresidis

2023

Advanced Photonics Research

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Free space (also termed quasi‐optical) metasurfaces have recently been designed and proposed as new types of polarizers that allow polarization control of an impinging wave in ways that are not possible with conventional designs. However, existing methods for tunable metasurface polarizers are not able to fully control the polarization dynamically; additionally, at mm‐wave and submillimeter bands, they typically suffer from high losses, which are predominantly produced by the inherent limitations of the tuning elements or materials. An electromechanically tunable reﬂection polariser that has the ability to fully control the polarization of an impinging wave has been designed, fabricated, and experimentally tested in a frequency band centered at 57 GHz. The proposed technique utilizes a variable air cavity between a periodic metasurface array and a ground plane, controlled by a piezoelectric actuator. The periodic metasurface element consists of two slightly different cross‐shaped metallic elements arranged in a periodic triangular lattice. Full‐wave simulations are presented and experimentally validated with measurements. The proposed approach is scalable from microwave up to THz frequencies with low‐loss performance due to the nature of the tuning technology whereby the tuning element is not interfering with the electromagnetic waves in the structure.

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

Cited by 19 publications

References 27 publications

Performance analysis and prediction of tunable metasurface filter based on electrochemical metallization

Performance analysis and prediction of tunable metasurface filter based on electrochemical metallization

Modular Design for Versatile Broadband Polarizing Metasurfaces with Freely Switching Functions

Multifunction Tunable Piezoelectric‐Actuated Metasurface at Millimeter‐Waves

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