ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 2, 2024
Language: Английский
Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)
Published: Aug. 12, 2024
Abstract Augmented reality (AR) displays, heralded as the next-generation platform for spatial computing, metaverse, and digital twins, empower users to perceive images overlaid with real-world environment, fostering a deeper level of human-digital interactions. With rapid evolution couplers, waveguide-based AR displays have streamlined entire system, boasting slim form factor high optical performance. However, challenges persist in waveguide combiner, including low efficiency poor image uniformity, significantly hindering long-term usage user experience. In this paper, we first analyze root causes uniformity displays. We then discover elucidate an anomalous polarization conversion phenomenon inherent volume gratings (PVGs) when incident light direction does not satisfy Bragg condition. This new property is effectively leveraged circumvent tradeoff between in-coupling eyebox uniformity. Through feasibility demonstration experiments, measure leakage multiple PVGs varying thicknesses using laser source liquid-crystal-on-silicon engine. The experiment corroborates phenomenon, results align simulation well. To explore potential such further, design simulate display 50° field view. achieving first-order PVG, are improved by 2 times 2.3 times, respectively, compared conventional couplers. groundbreaking discovery holds immense revolutionizing promising higher superior
Language: Английский
Citations
21
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 12, 2025
Abstract Blue phase liquid crystal (BPLC) dynamic patterns have attracted wide attention for promising applications in optical information manipulation and visualization sensing, owing to unique 3D chiral helix superstructure adjustable bright/abundant colors response extra fields. Inkjet printing has become an efficient approach achieving programmable BPLC patterns. However, it remains a challenge achieve independent “on/off” control of regional using the same ink due unrevealed temperature‐time‐dependent color change behavior determined by different inks. Herein, comprehensive understanding reflective bandgap shift law versus temperature/time is established investigating diffusion kinetics multiple inks (5CB, 6CB, 8CB) hydrophobically modified blue‐phase polymer templates. The three induce redshift followed blueshift color/reflectance wavelengths, but triggering times differ significantly at temperature, which attributed inks' transition characteristics, fluid properties, interaction with network. Dynamic multi‐color selective region are successfully fabricated based on time‐temperature controlled multi‐ink technique displaying time‐series multi‐level encryption (including “growing apple tree” “nested QR codes”). This study provides important insights into design fabrication advanced devices
Language: Английский
Citations
3
Deleted Journal, Journal Year: 2024, Volume and Issue: 2(3)
Published: June 14, 2024
Abstract In recent years, the advances in light‐responsive soft materials with fascinating properties and functions have attracted tremendous attention, which are also enlightening when attempting to achieve goals of complex deformations, motions, or attractive applications by precise regulation. Attractively, light is not only a clean inexhaustible energy but can be controlled remotely, quickly accurately non‐contact way. Moreover, capable amplifying photo‐triggered molecular changes at microscopic scale into macroscopic that is, directly converting input output mechanical work, therefore enabling potential field actuators functional devices. To date, some wonderful reviews reported progress photo‐driven materials. However, research ultraviolet, visible (Vis) near‐infrared (NIR) light‐driven containing azobenzene other non‐azobenzene moieties has been yet. this review, we summarize terms preparation methods, response wavelengths applications. Firstly, methods photoresponsive introduced. Subsequently, photoinduced deformations motions summarized, Vis NIR behaviors especially highlighted. Finally, classified. guide future work for researchers, existing problems development prospects proposed.
Language: Английский
Citations
15
Deleted Journal, Journal Year: 2024, Volume and Issue: 2(2)
Published: May 1, 2024
Abstract Electrochromic (EC) technology has been regarded as a promising energy‐saving in various applications, including smart windows, displays, thermal management, rear views, etc. Benefiting from the progress electrochromic material synthesis, electrode fabrication, and device configuration design, focus community gradually shifted to multifunctional devices (ECDs) era of Internet Things. Multifunctional ECDs, such energy storage devices, multi‐color deformable have showcased ability expand potential applications. In this review, available configurations, performance indexes advanced characterization techniques for ECDs are introduced classified accordingly. The applications storage, multicolor self‐chargeable actuators, etc., exemplified. future development trends perspectives also overlooked. aim review is guide inspire further efforts exploration novel ECDs.
Language: Английский
Citations
12
Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown
Published: June 4, 2024
Abstract Vortex‐vector beam generators can effectively improve the channel capacity and communication accuracy, but they face problems of narrow operating frequency band, low efficiency, fixed function. Here, a terahertz liquid crystal cascaded metadevice is demonstrated, including layer, an asymmetric metasurface helical phase layer. The combination crystal's anisotropy structural from realizes dynamic chirality construction. Then, tunable chiral fields are coupled with geometric last layer to realize active control between symmetric spin‐orbit angular momentum coupling, leading two types generation conversion: 1) spin‐dependent conversion energy distribution vortex beams ±2 topological charges; 2) conversions 2‐order cylindrical vector beam. experimental results show that excitation efficiency reach over 92.1%, intensity modulation depth different more than 72.4%. This THz mechanism device scheme increase degree freedom have potential applications in multi‐channel wireless communication, polarization multiplexing imaging, spectrum detection.
Language: Английский
Citations
7
Deleted Journal, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 30, 2024
Abstract Photoalignment technology is serving as an emerging for programming liquid crystalline polymer (LCP) materials due to its advantages including noncontact, high resolution, spatial control, programmability, and efficiency. In this review, we report the research progress in implementing polarized light design anisotropy of LCPs, which categorized based on photoalignment mechanisms. The alignment approaches different stimulus‐responsive behaviors after are discussed. Additionally, have summarized applications photoaligned LCPs such crystal displays, optical components, intelligent soft actuators, beyond. Finally, challenges future directions outlined.
Language: Английский
Citations
5
Deleted Journal, Journal Year: 2024, Volume and Issue: 2(2)
Published: May 1, 2024
Abstract The transient and elusive intermediate states are the keys in self‐assembly processes, which common phenomena shaping structure, properties, functionalities of assembled materials across many scientific domains. However, understanding about process is always challenging limited. In this review, we focus on these by combining theoretical experimental approaches. By examining a wide variety systems that span from biological to metal–organic nanostructures, review uncovers wealth self‐assembled materials. addition current knowledge, it will identify challenges provide new insight into opportunities for future research.
Language: Английский
Citations
4
Optics & Laser Technology, Journal Year: 2024, Volume and Issue: 181, P. 111725 - 111725
Published: Sept. 3, 2024
Language: Английский
Citations
4
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 35(2)
Published: Oct. 14, 2024
Abstract Notch filters usually involve high costs, great difficulties in processing, and very limited tunability. By coating a nematic liquid crystal (LC) layer onto well‐designed quasi‐bound states the continuum (quasi‐BICs) metasurface, this work designs demonstrates high‐ Q tunable filtering system with precise tunability near‐infrared spectral range. Optimal structural parameters performance are first determined by numerical simulations then confirmed experiments. The is enabled modifying LC molecules’ principal axes an applied voltage, where least distinguishable central wavelength interval smaller than 0.3 nm, largest factor extracted from experiments can be ≈256.1. Compared to most of commercial notch that visible region have no tunability, achieves ultra‐narrowband features low manufacture difficulty cost, control light propagation. proposed design also opens new avenues for developing BIC‐based devices enhanced signal‐to‐noise ratio multifunctional properties.
Language: Английский
Citations
4
ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown
Published: March 14, 2025
Blue-phase liquid crystals (BPLCs) have shown great potential in hyper-reflective display technology due to their narrow bandgap, high color saturation, and fast response characteristics. However, there remains a significant challenge for achieving open-patternable dual-chiral BPLC films (DH-BP) precise tuning efficient hyper-reflection the packaging limitations of crystal cells complexities dynamic bandgap matching principle. In this study, an situ secondary growth strategy was proposed successfully fabricate structurally continuous uniform DH-BP films. Key factors affecting uniformity were thoroughly analyzed, including optimization material structure, surface modification polymer template, control thickness. Subsequently, inkjet printing ink diffusion swelling techniques employed achieve films, with tunable range approximately 109 nm (from 576 467 nm), maximum reflectivity up 97%. Finally, multi-information encryption by integrating color, polarization, hyper-reflection. The method provides new insights into design high-saturation, high-reflection displays has broad application prospects energy-efficient security technologies.
Language: Английский
Citations
0