{"title":"All-Optically Driven Optofluidic Light Modulator","authors":"Riccardo Zamboni, Margherita Altin, Giovanni Bragato, Liana Lucchetti, Cinzia Sada, Annamaria Zaltron","doi":"10.1002/adom.202403457","DOIUrl":"https://doi.org/10.1002/adom.202403457","url":null,"abstract":"<p>Liquid crystals (LCs) are widely recognized for unique physical and optical properties and remarkable ability to modulate light beams. Traditional methods for actuating LCs by electric fields rely on the use of metallic electrodes, which face limitations in the spatial resolution of LCs actuation and their effective integration into optofluidic devices. In this work, an innovative approach is presented to realize a fully integrated optofluidic light modulator, capable of modifying the optical properties of a light beam propagating through an optical waveguide and coupled with a microfluidic channel. Specifically, the optoelectronic properties of lithium niobate (LN) are leveraged to control the orientation of LCs molecules confined in the microfluidic channel without the need for fixed metallic structures, but solely exploiting light-induced electric fields. It is demonstrated that the light-driven orientation of the LCs can efficiently modulate both the intensity and polarization of the light beam propagating through the waveguide, while the desired amplitude and time-constant of the output optical signal can be achieved by tuning the compositional properties of the LN substrate. The modulation of the guided beam is completely defined and controlled by a pump light source, assuring a high degree of reconfigurability and compatibility of the final optofluidic lab-on-a-chip system.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 14","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202403457","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Versatile Method for Nano-Fabrication on Diamond Film: Flexible Diamond Metasurfaces as a Demonstration","authors":"Yicheng Wang, Jixiang Jing, Yumeng Luo, Linjie Ma, Xiaomin Wang, Yuhao Zhang, Dong-Keun Ki, Zhongqiang Wang, Qi Wang, Kwai Hei Li, Zhiqin Chu","doi":"10.1002/adom.202403429","DOIUrl":"https://doi.org/10.1002/adom.202403429","url":null,"abstract":"<p>Diamond exhibits unique performance across a wide range of applications due to its enormous presentable properties in electronic, photonic, and quantum fields. Yet heterogeneous integration of diamonds for on-chip functionalities, like 2D materials, remains challenging due to the hard acquisition of scalable, transferable, and ultrathin diamond samples. Recently, edge-exposed exfoliation is demonstrated as an effective way to produce wafer-scale, freestanding, and ultrathin diamond films. However, the incompatibility of the newly developed diamond film with conventional nano-fabrication methods makes it difficult to fabricate diamond film into practical devices. Herein, the mask-transferring by sugar is demonstrated as a versatile method for pattern-definition on diamond films, which shows satisfying geometrical resolution and accuracy comparing to conventional approaches. Additionally, based on this method, the flexible all-diamond metasurfaces functioning as structural colors are achieved, which indicates its wide potential for fabricating more diamond-related devices.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 14","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202403429","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ou Xu, Xiaoyan Lu, Xiaodong Shen, Tongzhou Li, Bao Ke, Jialong Zhao, Bingsuo Zou
{"title":"Cr3+ Doping Enhanced Photoluminescence of Nano-Sized CsPbBr3 Perovskite","authors":"Ou Xu, Xiaoyan Lu, Xiaodong Shen, Tongzhou Li, Bao Ke, Jialong Zhao, Bingsuo Zou","doi":"10.1002/adom.202500045","DOIUrl":"https://doi.org/10.1002/adom.202500045","url":null,"abstract":"<p>CsPbBr<sub>3</sub> nanocrystals (NCs) have attracted extensive attention due to their high color purity and good thermal stability. However, due to the quenching of surface defects, the photoluminescence quantum yields (PLQY) are low, and there are few previous comparative studies on the magnetic ion doping of powders and nanocrystals in this system. In this article, the effect of Cr<sup>3+</sup> doping CsPbBr<sub>3</sub> NCs and CsPbBr<sub>3</sub> powders and their PL properties is investigated. The successful doping of Cr<sup>3+</sup> is verified by TEM, SEM, and EDS characterization. At the appropriate amount of Cr<sup>3+</sup>, the PLQY of Cr<sup>3+</sup> doped CsPbBr<sub>3</sub> NCs achieves 96%, twice that of undoped CsPbBr<sub>3</sub> NCs. However, the PLQY of the CsPbBr<sub>3</sub> powder does not change much after Cr<sup>3+</sup> doping at its close emission wavelength. The electron paramagnetic resonance (EPR), temperature dependent PL and density functional theory (DFT) calculation show that the enhanced PL of doped CsPbBr<sub>3</sub> NCs is due to the formation of exciton magnetic polaron (EMPs), while the confined excitons in undoped NCs are multiple due to spin-orbit interaction. In CsPbBr<sub>3</sub> powders, both EMPs and antiferromagnetic excitons (AMPs) coexist and compete, verified by the PL decay curve, temperature variation spectra, and low temperature PL spectra in strong magnetic field.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 15","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kostiantyn Tieriekhov, Maria Maniadi, Olivier Ségut, Sylvie Dabos-Seignon, Arnaud Brosseau, Valérie Dupray, Nicolas Mercier, Alexandre Abhervé
{"title":"Controlling the Orientation of Polar Axis in Chiral Metal-Halides to Reveal Their Intrinsic Circularly Polarized Luminescence","authors":"Kostiantyn Tieriekhov, Maria Maniadi, Olivier Ségut, Sylvie Dabos-Seignon, Arnaud Brosseau, Valérie Dupray, Nicolas Mercier, Alexandre Abhervé","doi":"10.1002/adom.202403205","DOIUrl":"https://doi.org/10.1002/adom.202403205","url":null,"abstract":"<p>Finely modulating the structure of the organic cation in metal-halide semiconductors is a powerful strategy to influence the symmetry and polarity of the hybrid compound as well as its optoelectronic properties. In this study, chiral organic <i>S/R</i>-hydroxybutylammonium (<i>S/R</i>-HBA) cations are used to prepare a series of 1D metal-halide networks. The resulting chiral and polar (<i>S/R</i>-HBA)<sub>2</sub>Pb<sub>3</sub>X<sub>8</sub> (X = Br or I) compounds show both second harmonic generation (SHG), circular dichroism (CD), and circularly polarized luminescence (CPL). Contrary to the 1D networks previously prepared from <i>S/R</i>-2-hydroxypropyl-1-ammonium (<i>S/R</i>-HP1A) cations, the new compounds show no alteration of their CD signal upon sample flipping, highlighting the suitable orientation of the unique polar axis in both bulk crystal and thin film states. Since no macroscopic effect can interfere with the true chiroptical response when the optical axis of the compound is normal to the incident light beam, (<i>S/R</i>-HBA)<sub>2</sub>Pb<sub>3</sub>Br<sub>8</sub> presents a true CPL without sign modulation after flipping or rotating the sample, despite the inherent optical anisotropy in this family of crystalline materials.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 13","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202403205","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohammad Adnan, Swagato Sarkar, Olha Aftenieva, Julius Brunner, Andreas Fery, Yana Vaynzof, Tobias A.F. König
{"title":"Selective Directional Enhancement in Gold/Perovskite Quantum Dot Metasurfaces","authors":"Mohammad Adnan, Swagato Sarkar, Olha Aftenieva, Julius Brunner, Andreas Fery, Yana Vaynzof, Tobias A.F. König","doi":"10.1002/adom.202403397","DOIUrl":"https://doi.org/10.1002/adom.202403397","url":null,"abstract":"<p>Controlling directional radiation with minimal loss and fabrication effort through scalable methods is essential for integrating metasurfaces into photonic devices. Existing strategies enable tuning radiation properties by altering optical parameters of subwavelength dielectric gratings. Herein, a simple method is demonstrated to control the radiation direction of perovskite quantum dot (QD) metasurfaces through the addition of thin gold layers. This approach utilizes hybrid plasmonic modes and defect-free, template-assisted self-assembly techniques for low-loss, large-area production. This colloidal method allows precise control over nanostructure formation, ensuring reproducibility and enhanced optical properties. A 4.6-fold enhancement of the radiation toward the substrate and a 4.4-fold enhancement toward the cover region is achieved by evaporating a thin gold film with an optimal periodicity of 500 nm. Notably, the insertion of a metal layer allows the cover mode to exhibit enhancements that exceed typical expectations for plasmonic metasurfaces. This design is supported by plasmonic lattice theory and validated by electromagnetic modeling, allowing the gamma point to be customized to enhance emission in specific directions and media directly. This rational design strategy enhances the functionality of plasmonic perovskite-based metasurfaces for photonic on-chip applications, including nonlinear light-emitting devices and directional light sources.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 13","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202403397","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Topological Line Defect Waveguide","authors":"Nikhil Navaratna, Yi Ji Tan, Ranjan Singh","doi":"10.1002/adom.202403451","DOIUrl":"https://doi.org/10.1002/adom.202403451","url":null,"abstract":"<p>Photonic crystal line-defect waveguides featuring bandgap confined low loss waveguiding are hindered by high bending losses. Although vortex-mediated topological modes can facilitate seamless propagation through sharp bends, studies of topological transport have primarily focused on interfacial waveguides. In this work, we unveil the prevalence of topological modes across diverse photonic crystal platforms by experimentally demonstrating topological transport in line-defect waveguides. Furthermore, this is achieved by employing interfacial waveguides as mode convertors to selectively excite latent topological states. Topological mode signatures, such as counterpropagating waves, are utilized to establish the existence of topological transport in line-defect waveguides designed using translational unit cells whose electromagnetic eigenstates exhibit phase vortices and non-zero Berry curvatures. It is envisioned that extending topological photonics beyond interfacial systems unlocks new avenues in applications ranging from non-Hermitian topological photonics to topological light-matter interactions.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 14","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202403451","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Greta Sambucari, Corinne Coutant, Alessandro Di Michele, Gina Elena Giacomazzo, Pierrick Nun, Vincent Sol, Noe Renard, Tan-Sothea Ouk, Vincent Coeffard, Mariangela Di Donato
{"title":"Triarylphosphonium BODIPY-Based [2]Rotaxanes Nanoparticles for Light-Driven Antibacterial Applications","authors":"Greta Sambucari, Corinne Coutant, Alessandro Di Michele, Gina Elena Giacomazzo, Pierrick Nun, Vincent Sol, Noe Renard, Tan-Sothea Ouk, Vincent Coeffard, Mariangela Di Donato","doi":"10.1002/adom.202403076","DOIUrl":"https://doi.org/10.1002/adom.202403076","url":null,"abstract":"<p>Antimicrobial photodynamic therapy (aPDT) is a promising strategy to overcome issues related to antibiotic resistance. Here the rationale for designing new photosensitizers is described based on the functionalization of bodipy dyes with triarylphosphonium rotaxanes, and an in-depth characterization of their photophysical properties, applying different spectroscopic techniques, including ultrafast transient absorption spectroscopy is provided. While the addition of halogen atoms to some of the structures provides them the ability to efficiently produce singlet oxygen in organic solvents, such property is suppressed in water, where all the investigated compounds aggregate into spherical nanoparticles. The latter, independently of the presence of bromine, demonstrate high photothermal conversion efficiency and have been tested as photosensitizers in antibacterial photothermal therapy, highlighting the potential of self-assembled organic nanostructures based on bodipy dyes for developing new and versatile nanomaterials for photomedicine applications.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 13","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202403076","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Efficient Quantum Dot Light-Emitting Diodes Based on Solution-Processed WOx Nanoparticles","authors":"Wenxuan Wang, Chang Gu, Zhixin Zhai, Hao Tan, Chaoyu Xiang, Haobo Cheng, Yunpeng Feng, Ting Zhang","doi":"10.1002/adom.202403443","DOIUrl":"https://doi.org/10.1002/adom.202403443","url":null,"abstract":"<p>Transition metal oxides, represented by tungsten oxides (WO<sub>x</sub>), are considered as a potential candidate of hole injection materials for optoelectronic thin-film devices to overcome the acidity and hygroscopicity of PEDOT:PSS. However, due to the lack of in-depth study of materials and careful construction of film interfaces, the performance of as-prepared quantum dot light-emitting diodes (QLEDs) is generally not ideal, which limits the further development and research of this field. Here, solution-processable WO<sub>x</sub> nanoparticles (WO<sub>x</sub> NPs) with excellent film-forming properties are synthesized and introduced to solve this issue. Meanwhile, in situ photo-induced ligand exchange enabled the robust interfaces of WO<sub>x</sub> films, expanding the selection of functional materials. The as-prepared QLED devices achieved a peak external quantum efficiency (EQE) of 15.09%, representing one of the best performances for WO<sub>x</sub>-based QLEDs. Furthermore, high-resolution WO<sub>x</sub> patterns (pixel size: ≈700 nm) through regional exposure were developed successfully, demonstrating the potential in future high-resolution and high-performance displays, and laying the foundation for the implementation of all inorganic QLEDs.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 14","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zexiong Hu, Xiaotan Ji, Dan Wang, Ning Wang, Yuheng Jin, Ming Lu, Haotong Wang, Nan Chen, Zhengqian Luo, Yikun Bu
{"title":"High Energy Laser Protective Coatings Based on Symmetric Multicomponent All-Dielectric Micro-Optical Reflectors","authors":"Zexiong Hu, Xiaotan Ji, Dan Wang, Ning Wang, Yuheng Jin, Ming Lu, Haotong Wang, Nan Chen, Zhengqian Luo, Yikun Bu","doi":"10.1002/adom.202403452","DOIUrl":"https://doi.org/10.1002/adom.202403452","url":null,"abstract":"<p>With the rapid advancement of laser weaponry, their exceptional strike capabilities and high energy density have become an increasing threat in modern warfare, necessitating the development of effective laser protection strategies. This study presents a novel symmetric, multicomponent, all-dielectric high-reflection film structure. By integrating multicomponent materials, the design enhances laser damage resistance, while its symmetric architecture enables the transformation from films to coatings using micro-optical reflectors (MOR). The resulting room-temperature-cured coating achieves a high reflectance of 94.7% at 1080 nm. After 20 s of laser irradiation at 1.5 kW cm<sup>−</sup><sup>2</sup>, the backside temperature increased by only 118.1 °C, with no visible signs of ablation. Even under extreme irradiation for 3 min, the coating demonstrated exceptional durability. These findings highlight the innovative application of optical reflective films for laser protection and underscore their potential for deployment on complex surfaces such as satellites, aircraft, and optoelectronic countermeasure systems.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 14","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haiyi Xie, Xiansheng Li, Zitao Wang, Jinxu Zhao, Qijun Chen, Yifan Wang, Mahmoud A. Khalifa, Bin Zhao, Gang Pei, Jianming Zheng, Chunye Xu
{"title":"Boosting WO3-Based Electrochromic Performance for Practical Smart Windows: Balancing Charge Density and Matching Color Based on Mn2+/MnO2 Counter-Electrode Reaction","authors":"Haiyi Xie, Xiansheng Li, Zitao Wang, Jinxu Zhao, Qijun Chen, Yifan Wang, Mahmoud A. Khalifa, Bin Zhao, Gang Pei, Jianming Zheng, Chunye Xu","doi":"10.1002/adom.202500015","DOIUrl":"https://doi.org/10.1002/adom.202500015","url":null,"abstract":"<p>Tungsten trioxide (WO<sub>3</sub>)-based electrochromic devices (ECDs) often struggle to match suitable counter-electrode materials due to their characteristic of high charge density and bluish hue. Herein, a new strategy is reported to meet the required charge density and color by introducing an interconversion between solution-phase Mn<sup>2+</sup> and film-phase MnO<sub>2</sub> as the counter-electrode reaction in WO<sub>3</sub> ECDs, and completing the full process from design and optimization to fabricating a practical smart window prototype. By optimizing the harmful byproduct Mn<sup>3+</sup> in electrolytes with varying pH values, the typical ECD achieves overall modulation over 70% across the full visible spectrum, retains >90% modulation after 12 h, and maintains excellent stability after 10 000 cycles. Additionally, by gelling the electrolyte, the ECD retains ≈80% modulation retention after 4 h of power-off at 80 °C. This approach also enables the smart window prototype to nearly block all solar radiation, reducing indoor temperature by over 40 °C, and enhancing waste heat recovery. Simulation results suggest that this smart window can significantly reduce building energy consumption in tropical and subtropical regions, offering promising application potential.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 15","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}