Recent Advances in Tunable Metasurfaces: Materials, Design, and Applications

ACS Nano, Journal Year: 2022, Volume and Issue: 16(9), P. 13339 - 13369

Published: Aug. 17, 2022

Metasurfaces, a two-dimensional (2D) form of metamaterials constituted by planar meta-atoms, exhibit exotic abilities to tailor electromagnetic (EM) waves freely. Over the past decade, tremendous efforts have been made develop various active materials and incorporate them into functional devices for practical applications, pushing research tunable metasurfaces forefront nanophotonics. Those include phase change (PCMs), semiconductors, transparent conducting oxides (TCOs), ferroelectrics, liquid crystals (LCs), atomically thin material, etc., enable intriguing performances such as fast switching speed, large modulation depth, ultracompactness, significant contrast optical properties under external stimuli. Integration offers substantial tunability conventional passive nanophotonic platforms. Tunable with multifunctionalities triggered stimuli bring in rich degrees freedom terms material choices device designs dynamically manipulate control EM on demand. This field has recently flourished burgeoning development physics design methodologies, particularly those assisted emerging machine learning (ML) algorithms. review outlines recent advances tuning mechanisms, applications. We conclude this paper providing future perspectives vibrant fast-growing field.

Language: Английский

---

Integrated metasurfaces for re-envisioning a near-future disruptive optical platform

Light Science & Applications, Journal Year: 2023, Volume and Issue: 12(1)

Published: June 20, 2023

Abstract Metasurfaces have been continuously garnering attention in both scientific and industrial fields, owing to their unprecedented wavefront manipulation capabilities using arranged subwavelength artificial structures. To date, research has mainly focused on the full control of electromagnetic characteristics, including polarization, phase, amplitude, even frequencies. Consequently, versatile possibilities wave achieved, yielding practical optical components such as metalenses, beam-steerers, metaholograms, sensors. Current is now integrating aforementioned metasurfaces with other standard (e.g., light-emitting diodes, charged-coupled devices, micro-electro-mechanical systems, liquid crystals, heaters, refractive elements, planar waveguides, fibers, etc.) for commercialization miniaturization trends devices. Herein, this review describes classifies metasurface-integrated components, subsequently discusses promising applications platforms those augmented/virtual reality, light detection ranging, In conclusion, presents several challenges prospects that are prevalent field order accelerate metasurfaces-integrated platforms.

Language: Английский

---

Compact multi-foci metalens spectrometer

Light Science & Applications, Journal Year: 2023, Volume and Issue: 12(1)

Published: May 4, 2023

A lightweight and portable spectrometer is desirable for miniaturization integration. The unprecedented capability of optical metasurfaces has shown much promise to perform such a task. We propose experimentally demonstrate compact high-resolution with multi-foci metalens. novel metalens designed based on wavelength phase multiplexing, which can accurately map the information into its focal points located same plane. measured wavelengths in light spectra agree simulation results upon illumination various incident spectra. uniqueness this technique lies that simultaneously realize splitting focusing. compactness ultrathin nature render technology have potential applications on-chip integrated photonics where spectral analysis processing be performed platform.

Language: Английский

---

Multi‐Dimensional Multiplexed Metasurface Holography by Inverse Design

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(21)

Published: Feb. 19, 2024

Abstract Multi‐dimensional multiplexed metasurface holography extends holographic information capacity and promises revolutionary advancements for vivid imaging, storage, encryption. However, achieving multifunctional by forward design method is still difficult because it relies heavily on Jones matrix engineering, which places high demands physical knowledge processing technology. To break these limitations simplify the process, here, an end‐to‐end inverse framework proposed. By directly linking to reconstructed images employing a loss function guide update of metasurface, calculation hologram can be omitted; thus, greatly simplifying process. In addition, requirements completeness meta‐library also significantly reduced, allowing multi‐channel achieved using meta‐atoms with only two degrees freedom, very friendly processing. exploiting proposed method, containing up 12 channels multi‐wavelength, multi‐plane, multi‐polarization designed experimentally demonstrated, exhibits state‐of‐the‐art multiplexing composed simple meta‐atoms. This conducive promoting intelligent meta‐devices, expected eventually accelerate application meta‐devices in colorful display, storage other fields.

Language: Английский

---

Quantum structured light in high dimensions

APL Photonics, Journal Year: 2023, Volume and Issue: 8(5)

Published: May 1, 2023

Structured light has become topical of late, where controlling in all its degrees freedom offered novel states long predicted, enhanced functionality applications, and a modern toolbox for probing fundamental science. Structuring as single photons entangled allows the spatial modes to be used encode large alphabet, accessing high dimensional Hilbert spaces tests quantum mechanics improved information processing tasks. In this tutorial, we outline basic concepts expressed basis (structured light) explain how create, control, detect such laboratory with focus on transverse orbital angular momentum pixel (position) modes. Finally, highlight some example applications structured light, from communications imaging.

Language: Английский

---

Multiplexed manipulation of orbital angular momentum and wavelength in metasurfaces based on arbitrary complex-amplitude control

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: April 28, 2024

Abstract Due to its unbounded and orthogonal modes, the orbital angular momentum (OAM) is regarded as a key optical degree of freedom (DoF) for future information processing with ultra-high capacity speed. Although manipulation OAM based on metasurfaces has brought about great achievements in various fields, such currently remains at single-DoF level, which means multiplexed other DoFs still lacking, greatly hampering application beams advancement metasurfaces. In order overcome this challenge, we propose idea coherent pixel (MCP) This approach enables arbitrary complex-amplitude under incident lights both plane waves, basis have realized DoF control wavelength. As result, MCP method expands types can be simultaneously responded by metasurfaces, enriches capability creates applications encryption demultiplexer. Our findings not only provide design high-security high-capacity but also raise level OAM, offering potential multifunctional nanophotonic devices future.

Language: Английский

---

Inelastic two-wave mixing induced high-efficiency transfer of optical vortices

Optics Express, Journal Year: 2024, Volume and Issue: 32(10), P. 16611 - 16611

Published: April 10, 2024

A scheme for high-efficiency transfer of optical vortices is proposed by an inelastic two-wave mixing (ITWM) process in inverted-Y four-level atomic medium, which originally prepared a coherent superposition two ground states. The orbital angular momentum (OAM) information the incident vortex probe field can be transferred to generated signal through ITWM process. Choosing reasonable experimentally realizable parameters, we find that presence off-resonance control greatly improve conversion efficiency vortices, rather than absence field. This caused broken destructive interference between one-photon excitation pathways. Furthermore, also extend our model multi-wave and demonstrate multiple strongly depends on Finally, explore composite beam collinear fields. It obvious intensity phase profiles effectively controlled via adjusting Potential applications may exist OAM-based communications processing.

Language: Английский

---

Meta-device: advanced manufacturing

Deleted Journal, Journal Year: 2024, Volume and Issue: 5(1), P. 117 - 117

Published: Jan. 1, 2024

Metasurfaces are one of the most promising devices to break through limitations bulky optical components. By offering a new method light manipulation based on light-matter interaction in subwavelength nanostructures, metasurfaces enable efficient amplitude, phase, polarization, and frequency derive series possibilities for important applications. However, key challenge realization applications meta-devices is how fabricate large-scale, uniform nanostructures with high resolution. In this review, we review state-of-the-art nanofabrication techniques compatible manufacture meta-devices. Maskless lithography, masked other highlighted detail. We also delve into constraints current fabrication methods while providing some insights solutions overcome these challenges advanced nanophotonic

Language: Английский

---

Smart meta-device powered by stray microwave energies: A green approach to shielding external interference and detection

Applied Energy, Journal Year: 2024, Volume and Issue: 378, P. 124770 - 124770

Published: Oct. 28, 2024

Language: Английский

---

Optical Metasurfaces for Biomedical Imaging and Sensing

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Optical metasurfaces, arrays of nanostructures engineered to manipulate light, have emerged as a transformative technology in both research and industry due their compact design exceptional light control capabilities. Their strong light–matter interactions enable precise wavefront modulation, polarization control, significant near-field enhancements. These unique properties recently driven application biomedical fields. In particular, metasurfaces led breakthroughs imaging technologies, such achromatic imaging, phase extended depth-of-focus imaging. They also advanced cutting-edge biosensing featuring high-quality factor resonators As the demand for device miniaturization system integration increases, are expected play pivotal role development next-generation devices. this review, we explore latest advancements use applications, with particular focus on sensing. Additionally, discuss future directions aimed at transforming field by leveraging full potential provide compact, high-performance solutions wide range applications.

Language: Английский

---