{"title":"Ultrafast Photodetectors for Secure Communication, Logic Processing, and Machine Learning-Assisted Optical Material Classification","authors":"Mohit Kumar, Hyungtak Seo","doi":"10.1002/adom.202501088","DOIUrl":"https://doi.org/10.1002/adom.202501088","url":null,"abstract":"<p>Despite significant advancements in high-speed photodetection, existing ultrafast photodetectors remain constrained by fundamental limitations in responsivity, dynamic range, and signal integrity, particularly for applications requiring secure communication and adaptive processing. An ultrafast photodetector that captures optical transients on nanosecond timescales, far surpassing the ≈µs speed limitations of conventional photosensors is presented. Achieving a 61 ns response time (33 ns halfwidth) via a coplanar Schottky-capacitive design, this device leverages instantaneous photo-induced capacitance modulation to generate transient current spikes, effectively bypassing RC time-constant limitations. The resulting transient detection mode offers a large linear dynamic range (>93 dB) and a 6000% enhanced sensitivity compared to conventional steady-state photocurrent operation. This ultrafast speed and sensitivity are harnessed for secure high-speed data transmission and logic processing via an electro-optical modulation scheme that ensures reliable, tamper-resistant information encoding. Furthermore, the photodetector's nonlinear, bias-tunable photoresponse captures distinct material-dependent optical signatures, allowing machine learning classification of metals, insulators, and semiconductors with over 82% accuracy. By integrating ultrafast optical detection with secure communication and logic processing capabilities, this photodetector platform represents a transformative solution for next-generation robotics, automation, intelligent sensing, and high-security materials characterization.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284946","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}
{"title":"Microwave Assisted Encapsulation of Chiral Carbon Nanodots in Metal-Organic Framework Film for Broadband Excited Circularly Polarized Luminescence","authors":"Zhi-Chen Zhang, Shui-Ming Jing, Zhi-Gang Gu, Jian Zhang","doi":"10.1002/adom.202500995","DOIUrl":"https://doi.org/10.1002/adom.202500995","url":null,"abstract":"<p>Developing high circularly polarized luminescence (CPL) with broadband excitation wavelengths is important in practical applications but is still challenging. Herein, the example combining chiral carbon nanodots (cCND) and metal-organic framework (MOF) film is reported for achieving broadband excited CPL with UV–vis light excitation. The stable Zr-MOF containing perylene-based ligand with broadband excitation is prepared by using the vapor-assisted conversion method, and then is loaded with chiral precursors and microwave-treated to obtain cCND loaded MOF (cCND@MOF) films. The resulted host-guest film not only in situ encapsulates uniform sized cCND into MOF film with microwave treatment, but also avoids the aggregation-caused quenching effect of cCND and enhances the chiral/energy transfer from perylene based MOF film for achieving intense luminescence and high CPL with broadband excitation wavelengths from UV to visible region, and increased the g<sub>lum</sub> to 10<sup>−2</sup>. This study provides an efficient and convenient microwave-assisted method for constructing host-guest materials by loading cCND into MOFs, and develops broadband excited CPL film materials.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284710","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}
{"title":"Miniaturized Spectrometer Enabled by End-to-End Deep Learning on Large-Scale Radiative Cavity Array","authors":"Xinyi Zhou, Cheng Zhang, Xiaoyu Zhang, Yi Zuo, Zixuan Zhang, Feifan Wang, Zihao Chen, Hongbin Li, Chao Peng","doi":"10.1002/adom.202501196","DOIUrl":"10.1002/adom.202501196","url":null,"abstract":"<p>Miniaturized (mini-) spectrometers are highly desirable tools for chemical, biological, and medical diagnostics because of their potential for portable and in situ spectral detection. In this work, a mini-spectrometer that combines a large-scale radiative cavity array with end-to-end deep learning networks is proposed and demonstrated. Specifically, high-<i>Q</i> bound states are utilized in continuum cavities with distinct radiation characteristics as the fundamental units to achieve parallel spectral detection. An array of resonators with quality factors above 10<sup>4</sup> over a wide spectral range, from 1525 to 1605 nm, is realized. A deep network with 8000 outputs is further trained to directly map arbitrary spectra to array responses excited by the out-of-plane incident. Experimental results demonstrate that the proposed mini-spectrometer can resolve unknown spectra with a resolution of 0.048 nm in a bandwidth of 80 nm and fidelity exceeding 95%, thus offering a promising method for compact, high resolution, and broadband spectroscopy.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 26","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050908","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}
{"title":"Diffusiophoretic Trapping and Assembly of Nanoparticles Enhanced by Multilayer MXene Nanosheet","authors":"Fengya Lu, Jiankang Wang, Peipei Wei, Xinyu Fan, Jifu Lyu, Hao Wu, Changxu Li, Haoqi Luo, Zhensheng Zhong, Yu-Xuan Ren, Jinhua Zhou","doi":"10.1002/adom.202501240","DOIUrl":"https://doi.org/10.1002/adom.202501240","url":null,"abstract":"<p>Efficient manipulation of nanoscale multiple colloids poses great challenges on laser power, flexibility, and photodamage. MXene, as an emergent 2D material, exhibits excellent optothermal and mechanical properties when coated on various substrates. Herein, a novel optothermal manipulation platform based on multilayered MXene nanosheets is proposed, with great cell compatibility. The experimental and theoretical results demonstrate that individual multilayered MXene nanosheets exhibit superb photothermal conversion efficiency at visible wavelengths. The 500 nm-diameter colloidal particle can be stably trapped and transported under a power of 0.6 mW, which is over two orders of magnitude smaller than traditional optical tweezers. Specifically, a reversible self-assembly of colloidal particles with diverse patterns, including hexagonal crystallization, chain pattern, and ring-shaped assembly. This is realized by control over the laser-induced temperature gradient and thermophoretic response. Furthermore, a single-flake level MXene can also closely adhere to the cell membrane, in addition to glass substrates. This enables directed migration and assembly of a large number of particles on a cellular substrate. Compared with a typical noble metal substrate, MXene has better biocompatibility, flexibility, and without the need for complex micro-nano fabrication processes. It is expected to promote applications in biomolecular interactions, cellular drug delivery, and colloidal crystals.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284941","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}
Charitini Panagiotopoulou, Shangpu Liu, Johannes Pittrich, Hristo Iglev, Felix Deschler, Aras Kartouzian
{"title":"Chiroptical Amplification Beyond Enantiopurity in Chiral Films","authors":"Charitini Panagiotopoulou, Shangpu Liu, Johannes Pittrich, Hristo Iglev, Felix Deschler, Aras Kartouzian","doi":"10.1002/adom.202501895","DOIUrl":"https://doi.org/10.1002/adom.202501895","url":null,"abstract":"<p>Chiral films are key functional materials for spintronics, enantioselective sensing, and chiral photonics. Understanding and controlling chiroptical activity in such materials is crucial for advancing next-generation photonic and spintronic technologies. A widely held belief is that enantiopure systems inherently offer the strongest chiroptical responses. In this perspective, this assumption is questioned by drawing attention to nonlinear dependencies between normalized chiroptical response as given by the anisotropy factor, g, and enantiomeric excess (<i>ee</i>) in thin-film systems. Using 2D and 1D chiral hybrid metal-halide perovskites as testbeds, it is shown that the highest optical activity often emerges at intermediate <i>ee</i> values – far from the enantiopure limit. Also, for tryptophan (a chiral amino acid), a similar response is observed. This behavior points to complex structural reorganizations and interaction patterns in chiral films. The common practice of limiting chiroptical measurements on chiral films to racemic and enantiopure samples overlooks a rich, informative regime is believed. Systematic g–<i>ee</i> profiling is proposed as a standard part of the experimental workflow in chiral materials research, which can reveal underexplored material spaces and enable more deliberate control of chiroptical properties.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202501895","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284889","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}
Syeda Ramsha Ali, Stephen V. Kershaw, Mian Muhammad Faisal, Basel Halak, Nema M. Abdelazim
{"title":"Illuminating Advances in Materials: Optical Physical Unclonable Functions for Security Applications","authors":"Syeda Ramsha Ali, Stephen V. Kershaw, Mian Muhammad Faisal, Basel Halak, Nema M. Abdelazim","doi":"10.1002/adom.202501564","DOIUrl":"https://doi.org/10.1002/adom.202501564","url":null,"abstract":"<p>A physical unclonable function (PUF) device leverages manufacturing randomness to generate a unique fingerprint for secure authentication, encryption, and counterfeit prevention. Optical PUFs (OPUFs) have gained prominence due to their strong security, light-based challenge-response mechanisms, and potential for quantum-secure encryption. These devices have promising applications for hardware security, authentication, cryptographic key generation, and anti-counterfeiting measures across multiple industries. This review enlightens the diverse material platforms used for OPUFs, ranging from fiber optics and liquid crystals to advanced semiconductor nanocrystals and plasmonic metasurfaces, each offering distinct optical characteristics that impact security strength. While no single material system dominates the field, hybrid and multi-model approaches integrating low-dimensional materials are being explored to enhance reliability and scalability. Finally, the challenges and future perspectives are outlined, including adaptive OPUFs architectures, utilizing artificial intelligence (AI) for challenge-response generation, and their integration into quantum communication networks, highlighting how next-generation semiconductor materials can further advance OPUFs technologies.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202501564","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284888","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":"Superradiant Anti-Stokes Fluorescence of Organic Dye J-Aggregates","authors":"Hankyul Lee, Zee Hwan Kim","doi":"10.1002/adom.202501565","DOIUrl":"https://doi.org/10.1002/adom.202501565","url":null,"abstract":"<p>Molecular emission with shorter wavelengths than the excitation light has diverse applications in biology, chemistry, and physics. Anti-Stokes fluorescence (aSFL), which occurs when molecules in thermally excited vibrational states undergo electronic transitions and emit fluorescence, offers the advantage of being a one-photon process that does not require high-intensity, focused light, unlike multiphoton up-conversion. However, only a few organic dyes exhibit weak, spectrally broad aSFL, limiting their usage. Here, it is demonstrated that the superradiance of dye J-aggregates enables bright and spectrally narrow (width of ≈6 nm) aSFL emission. Furthermore, it is shown that this J-aggregate aSFL (J-aSFL) enables real-time, wide-field imaging, which is not possible with other multi-photon methods or with monomeric aSFL. It is found that J-aSFL is a general property across various dyes, allowing structurally tunable, narrow-band emission suitable for multiplexed imaging of bio-samples. Beyond imaging, the results also open new opportunities for local temperature sensing and optical cooling of organic solids.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284890","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}
{"title":"Molecules Engineering of Continuous Self-Assembled Photonic Crystal Films from Fluorene-Based Ortho-Linkage Gridization Nanopolymer","authors":"Hao Li, Qianyi Li, Yunfei Zhu, Yunlong Zhang, Jiangqiang He, Yongze Ren, Shifeng Li, Changli Ma, Jingyao Ma, Yang Li, Manman Luo, Fan Yu, Qiuhu Han, Man Xu, Aiyun Zhu, Shoujia Zhu, Bingyang Wang, Gangyi Zhu, Mengna Yu, Quanyou Feng, Linghai Xie","doi":"10.1002/adom.202501678","DOIUrl":"https://doi.org/10.1002/adom.202501678","url":null,"abstract":"<p>The integration of organic light-emitting polymers with photonic crystals (PhCs) presents a compelling platform for achieving enhanced light outcoupling efficiency, representing a significant advancement in the development of efficient PLEDs and ASE emitters. Herein, a direct oriented molecular design strategy for mesoscale self-assembly under ambient conditions is demonstrated, successfully fabricating photonic crystals (PhCs) through 1D linear structure fluorene-based nanopolymers. This ordered self-assembly exhibits typical angular-resolved Bragg-Snell diffraction behavior. Notably, the PhC films demonstrate substantial performance improvements, with the current efficiency rising from 0.50 to 0.75 cd A<sup>−1</sup>, while the threshold for amplified spontaneous emission through self-assembly is significantly reduced from 105.05 to 48.46 kW cm<sup>−2</sup>. This nanogridization-driven approach to organic polymer semiconductors opens new avenues for cross-scale molecular design, offering promising opportunities for the development of multifunctional and intelligent light displays.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284837","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}
{"title":"Excitation and Momentum Resolved Multi-Polaritonic Emission Mapping in Organic-Inorganic Microcavity","authors":"Jhuma Dutta, Nitin Yadav, Ben Johns, Jino George","doi":"10.1002/adom.202502324","DOIUrl":"https://doi.org/10.1002/adom.202502324","url":null,"abstract":"<p>Hybridization of an organic Frenkel exciton (layer-by-layer TDBC) and an inorganic Wannier-Mott exciton (WS<sub>2</sub> monolayer) results in the formation of a multi-polaritonic system. Such a hybrid platform offers an excellent way of engineering the emission through the coupled states. This article demonstrates the mapping of dispersion characteristics of multi-polaritonic emission using excitation and momentum resolved, Fourier-plane micro-spectroscopy. Further, the contribution of photon fractions is correlated to the emission of the polaritonic branches. For example, an increase in the photon fraction of the middle polaritonic state is observed at certain momenta in the Fourier space, thereby amplifying the emission population density. The competition between the middle and lower polaritonic states is tested at various cavity detuning conditions and found to be in accordance with the modeling. This work has potential implications and helps to design future-generation optoelectronic and photonic devices.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284838","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}