Ultra-high spatial resolutions in photopatterning molecular orientations DOI Creative Commons

Hai Yun,

Songxu Jiang,

Hao Chen

et al.

Optics Express, Journal Year: 2024, Volume and Issue: 32(18), P. 31107 - 31107

Published: Aug. 5, 2024

Accurately aligning liquid crystal molecules into predetermined spatially variant orientations is crucial for fabricating devices such as flat optical elements, soft actuators and robots. Despite the developments of various photopatterning techniques this purpose, limits their spatial resolutions have been rarely addressed. In study, we delve physical constraints governing two prominent methods: single exposure to light fields with structured polarizations multi-exposures intensities. Theoretical analyses show that minimal grating period first method only half Abbe limit an intensity imaging system, second system can surpass Rayleigh limit. Experimental studies demonstrate unprecedent high resolution periods 1 µm. We further establish core size in photopatterned singular topological defects linearly proportional charge these yield less than µm defect cores are demand applications coronagraphs.

Language: Английский

Ultrathin broadband terahertz metamaterial based on single-layer nested patterned graphene DOI
Zhipeng Li, Shubo Cheng, Huafeng Zhang

et al.

Physics Letters A, Journal Year: 2025, Volume and Issue: unknown, P. 130262 - 130262

Published: Jan. 1, 2025

Language: Английский

Citations

51
Electrically tunable optical metasurfaces DOI Creative Commons
Fei Ding, Chao Meng, Sergey I. Bozhevolnyi

et al.

Photonics Insights, Journal Year: 2024, Volume and Issue: 3(3), P. R07 - R07

Published: Jan. 1, 2024

Citations

20
The Road to Commercializing Optical Metasurfaces: Current Challenges and Future Directions DOI
Younghwan Yang, Eunji Lee, Yujin Park

et al.

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

Published: Jan. 15, 2025

Optical metasurfaces, components composed of artificial nanostructures, are recognized for pushing boundaries wavefront manipulation while maintaining a lightweight, compact design that surpasses conventional optics. Such advantages align with the current trends in optical systems, which demand communication devices and immersive holographic projectors, driving significant investment from industry. Although interest commercialization metasurfaces has steadily grown since initial breakthrough diffraction-limited focusing, their practical applications have remained limited by challenges such as, massive-production yield, absence standardized evaluation methods, constrained methodology. Here, this Perspective addresses particularly focused on mass production, fabrication tolerance, performance evaluation, integration into commercial systems. Additionally, we select fields where may soon play roles provide perspective potentials. By addressing exploring solutions, aims to foster discussions will accelerate utilization further build near-future metaphotonics platforms.

Language: Английский

Citations

7
Terahertz bands multifunctional metamaterial transmission-absorption switching device based on vanadium dioxide DOI
Xinmei Wang, Xiaoyong He, Chaojun Tang

et al.

Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

In this paper, a vanadium dioxide (VO2)-based terahertz device is proposed to realize the conversion between broadband absorption and transmission functions, including VO2 bottom layer, dielectric layer pattern in three-layer structure. With change of conductivity, metamaterial can switch transmission. When exhibits transmission, it has high transmittance 90% for waves 5.6 THz 8.7 frequency band. absorption, 3.66 9.98 Furthermore, with increasing peak decreases from 93.8% 0% increases 1% 99.5%. The impedance matching theory invoked physical mechanism elucidated by analyzing surface electric field device. By studying characteristics different incidence polarization angles, insensitive good performance over large angles. Compared other absorbers metamaterials, structure study unique design diverse functions play an important role various fields such as communications, electromagnetic stealth, sensors, thermal emission devices.

Language: Английский

Citations

5
Advanced biological imaging techniques based on metasurfaces DOI Creative Commons
Yongjae Jo, Hyemi Park,

Hyeyoung Yoon

et al.

Opto-Electronic Advances, Journal Year: 2024, Volume and Issue: 0(0), P. 240122 - 240122

Published: Jan. 1, 2024

Language: Английский

Citations

15
Advancements and Applications of Diffractive Optical Elements in Contemporary Optics: A Comprehensive Overview DOI
Svetlana N. Khonina, Nikolay L. Kazanskiy, Р. В. Скиданов

et al.

Advanced Materials Technologies, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 31, 2024

Abstract Diffractive optical elements (DOEs) represent a revolutionary advancement in modern optics, offering unparalleled versatility and efficiency various applications. Their significance lies their ability to manipulate light waves with intricate patterns, enabling functionalities beyond what traditional refractive optics can achieve. DOEs find widespread use fields such as laser beam shaping, holography, communications, imaging systems. By precisely controlling the phase amplitude of light, generate complex structures, correct aberrations, enhance performance Moreover, compact size, lightweight nature, potential for mass production make them indispensable designing efficient devices diverse industrial scientific From improving systems innovative display technologies, continue drive advancements promising even more exciting possibilities future. In this review, critical importance is illuminated explore profound implications contemporary era.

Language: Английский

Citations

11
Design of a Tunable Metamaterial Absorption Device with an Absorption Band Covering the Mid-Infrared Atmospheric Window DOI Creative Commons
Zhong He, Dong Fang,

Yougen Yi

et al.

Photonics, Journal Year: 2025, Volume and Issue: 12(2), P. 148 - 148

Published: Feb. 12, 2025

We propose a highly efficient broadband tunable metamaterial infrared absorption device. The design is modeled using the three-dimensional finite element method for results show that device captures over 90% of light in wavelength range from 6.10 μm to 17.42 μm. utilize VO2’s phase change property adjust device, allowing average level vary between 20.61% and 94.88%. In this study, we analyze electromagnetic field distribution at its peak point find high achieved through both surface plasmon resonance Fabry–Perot cavity resonance. structural parameters are fine-tuned parameter scanning. By comparing our work with previous studies, demonstrate superior performance design. Additionally, investigate polarization angle incident it insensitive these factors. Importantly, simple structure broadens potential uses photodetection, stealth, sensing.

Language: Английский

Citations

1
Ultranarrow-linewidth wavelength-vortex metasurface holography DOI Creative Commons

Weijia Meng,

Johannes E. Fröch,

Ke Cheng

et al.

Science Advances, Journal Year: 2025, Volume and Issue: 11(12)

Published: March 21, 2025

Metasurface holograms harness multiple degrees of freedom light to enhance information channel capacity. Traditionally, wavelength multiplexing holography with high-capacity was only achievable through 3D volume using Bragg diffraction. Here, we demonstrate ultranarrow-linewidth wavelength-vortex in metasurface holograms. By applying elementary dispersion engineering, develop a sparse k -vector–filtering aperture array momentum space, enabling sharp selectivity combined orbital angular selectivity. Further leveraging transformer neural networks for the design phase-only holograms, showcase reconstruction up 118 independent images from single hologram, achieving simulated ultranarrow linewidth 2 nanometers within visible range. We apply these developed holographic visual cryptography, attaining unprecedented security levels an rate over 2500 times higher than traditional methods. Our results open exciting avenues application various fields, including displays, encryption, and optical artificial intelligence.

Language: Английский

Citations

1
Nanofabrication for Nanophotonics DOI
Younghwan Yang,

Youngsun Jeon,

Zhaogang Dong

et al.

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

Published: March 28, 2025

Nanofabrication, a pivotal technology at the intersection of nanoscale engineering and high-resolution patterning, has substantially advanced over recent decades. This enables creation nanopatterns on substrates crucial for developing nanophotonic devices other applications in diverse fields including electronics biosciences. Here, this mega-review comprehensively explores various facets nanofabrication focusing its application nanophotonics. It delves into techniques like focused ion beam electron lithography, methods 3D complex structure fabrication, scalable manufacturing approaches, material compatibility considerations. Special attention is given to emerging trends such as utilization two-photon lithography structures materials phase change substances 2D with excitonic properties. By highlighting these advancements, review aims provide insights ongoing evolution nanofabrication, encouraging further research creating functional nanostructures. work encapsulates critical developments future perspectives, offering detailed narrative state-of-the-art tailored both new researchers seasoned experts field.

Language: Английский

Citations

1
Fluid‐Infiltrated Metalens‐Driven Reconfigurable Intelligent Surfaces for Optical Wireless Communications DOI Creative Commons

Ramna Khalid,

Jaekyung Kim, Nasir Mahmood

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(43)

Published: Sept. 28, 2024

Abstract A reconfigurable intelligent surface (RIS), a leading‐edge technology, represents new paradigm for adaptive control of electromagnetic waves between source and user. While RIS technology has proven effective in manipulating radio frequency using passive elements such as diodes MEMS, its application the optical domain is challenging. The main difficulty lies meeting key performance indicators, with most critical being accurate self‐adjusting positioning. This work presents an alternative design methodology driven by all‐silicon structure fluid infiltration, to achieve real‐time focal length toward designated user, thereby enabling secure data transmission. To validate concept, both numerical simulations experimental investigations are conducted demonstrate fluid‐infiltrated metalens‐driven this application. When combined different fluids, resulting ultra‐compact exhibits exceptional varifocal abilities, ranging from 0.4 0.5 mm, confirming tuning capabilities design. may significantly enhance modulation promote development RIS‐based applications wireless communications data‐transmission integrated photonic devices.

Language: Английский

Citations

4