Brayden Lukaskawcez, Shivasheesh Varshney, Sooho Choo, Sang Hyun Park, Dongjea Seo, Liam Thompson, Nitzan Hirshberg, Madison Garber, Devon Uram, Hayden Binger, Steven J. Koester, Sang-Hyun Oh, Tony Low, Bharat Jalan, Alexander S. McLeod
{"title":"Interfacial Strong Coupling and Negative Dispersion of Propagating Polaritons in Freestanding Oxide Membranes","authors":"Brayden Lukaskawcez, Shivasheesh Varshney, Sooho Choo, Sang Hyun Park, Dongjea Seo, Liam Thompson, Nitzan Hirshberg, Madison Garber, Devon Uram, Hayden Binger, Steven J. Koester, Sang-Hyun Oh, Tony Low, Bharat Jalan, Alexander S. McLeod","doi":"10.1002/adom.202501452","DOIUrl":"https://doi.org/10.1002/adom.202501452","url":null,"abstract":"<p>Membranes of complex oxides like perovskite SrTiO<sub>3</sub> extend the multi-functional promise of oxide electronics into the nanoscale regime of 2D materials. Here, it is demonstrated that freestanding oxide membranes supply a reconfigurable platform for nano-photonics based on propagating surface phonon polaritons. Infrared near-field imaging and spectroscopy enabled by a tunable ultrafast laser are applied to study pristine nano-thick SrTiO<sub>3</sub> membranes prepared by hybrid molecular beam epitaxy. As predicted by coupled mode theory, it is found that strong coupling of interfacial polaritons realizes symmetric and antisymmetric hybridized modes with simultaneously tunable negative and positive group velocities. By resolving reflection of these propagating modes from membrane edges, defects, and substrate structures, their dispersion is quantified with position-resolved nano-spectroscopy. Remarkably, polariton negative dispersion is found to be both robust and tunable through choice of membrane dielectric environment and thickness, and proposes a novel design for in-plane Veselago lensing harnessing this control. This work lays the foundation for tunable transformation optics at the nanoscale using polaritons in a wide range of freestanding complex oxide membranes.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202501452","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284833","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}
Zuanming Jin, Huixiang Hong, Yun Sun, Zhangshun Li, Jing Li, Jingyi Peng, Tianxiao Nie, Yan Peng, Chao Zhang, Alexei V. Balakin, Alexander P. Shkurinov, Yiming Zhu, Songlin Zhuang
{"title":"Ultrafast All-Optical Terahertz Switchable Modulation Using Van Der Waals Fe4GeTe2/Bi2Te3 Heterostructures (Advanced Optical Materials 26/2025)","authors":"Zuanming Jin, Huixiang Hong, Yun Sun, Zhangshun Li, Jing Li, Jingyi Peng, Tianxiao Nie, Yan Peng, Chao Zhang, Alexei V. Balakin, Alexander P. Shkurinov, Yiming Zhu, Songlin Zhuang","doi":"10.1002/adom.70256","DOIUrl":"10.1002/adom.70256","url":null,"abstract":"<p><b>Optical-Pump Terahertz-Probe Spectroscopy</b></p><p>In article 10.1002/adom.202500951, Zuanming Jin, Tianxiao Nie, Yan Peng, Yiming Zhu, and co-workers investigate ultrafast all-optical THz switchable modulation in two-dimensional van der Waals Fe<sub>4</sub>GeTe<sub>2</sub>/Bi<sub>2</sub>Te<sub>3</sub> heterostructures using optical pump-THz probe (OPTP) spectroscopy. By comparing the OPTP results of Fe<sub>4</sub>GeTe<sub>2</sub>/Bi<sub>2</sub>Te<sub>3</sub> with those of single-layer Fe<sub>4</sub>GeTe<sub>2</sub> and Bi<sub>2</sub>Te<sub>3</sub> films, it has been determined that both interface carrier accumulation and thermal effects contribute to conductivity switching, indicating potential for advanced opto-spintronic devices.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 26","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adom.70256","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050876","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":"Interior and Exterior Boron Doping in Functional Azacalixarenes Triggering Narrowband Delayed Fluorescence (Advanced Optical Materials 26/2025)","authors":"Sudhir K. Keshri, Hiroko Nomura, Takuma Yasuda","doi":"10.1002/adom.70248","DOIUrl":"10.1002/adom.70248","url":null,"abstract":"<p><b>Interior versus Exterior Boron Doping in Azacalix[3]arenes</b></p><p>A directional borylation strategy enables interior and exterior boron doping of functional azacalix[3]arene, producing two distinct MR-TADF luminophores. The inward-doped compound emits sharp violet light, while outward borylation yields highly efficient blue electroluminescence. This regioselective approach unlocks advanced design possibilities for OLED materials with tunable narrowband emission. More details can be found in article 10.1002/adom.2501193 by Sudhir K. Keshri, Hiroko Nomura, and Takuma Yasuda.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 26","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adom.70248","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050978","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}
Tomoshree Dash, Estevao Marques Dos Santos, Tahmid H. Talukdar, Judson D. Ryckman
{"title":"C2LI: Enhancing Structural Color Sensing and Imaging via Complementary Color Laser Illumination (Advanced Optical Materials 26/2025)","authors":"Tomoshree Dash, Estevao Marques Dos Santos, Tahmid H. Talukdar, Judson D. Ryckman","doi":"10.1002/adom.70249","DOIUrl":"10.1002/adom.70249","url":null,"abstract":"<p><b>Complementary Color Laser Illumination</b></p><p>In article 10.1002/adom.202500966, Judson Ryckman, and co-authors report a novel imaging strategy called Complementary Color Laser Illumination (C2LI). By illuminating samples with red–cyan laser pairs, C2LI amplifies chromatic contrast and engages nonlinear visual processing, enabling enhanced real-time detection of subtle color differences in diagnostics, imaging, and environmental sensing.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 26","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adom.70249","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050877","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":"Synthesis of Hypervalent Gallium(III) Complexes and Their Ability to Turn-On Luminescent Sensors for Lewis Bases","authors":"Chiaki Hotta, Masashi Nakamura, Masayuki Gon, Kazuo Tanaka","doi":"10.1002/adom.202501251","DOIUrl":"https://doi.org/10.1002/adom.202501251","url":null,"abstract":"<p>The introduction of main-group elements into the π-conjugated systems enables the modulation of optical properties based on changes in the coordinated state of the elements, and the use of heavy elements with high Lewis acidity is expected to broaden the range of coordination response. In this study, focus is placed on hypervalent gallium azobenzene complexes with variable coordination motifs because of a wide accessible space around gallium. The six-, five-, and four-coordinated gallium azobenzene complexes are isolated with pyridine ligands, and it is observed that the coordination of pyridine can dynamically change in the solution. Interestingly, the enhancement of the absolute fluorescence quantum yields is observed by the suppressing structural relaxation as increasing the coordination number. Furthermore, it is found that the emission efficiency is enhanced as increasing donor number which represents the strength of Lewis basicity. Finally, it is demonstrated that the filter paper soaked by the synthesized gallium complex is prepared, and it worked as a turn-on luminescent sensor to easily visualize strength of Lewis basicity of solvents by simply dropping the solvent on the paper. The findings are valuable for the development of designable and controllable stimuli-responsive materials focusing on the inherent properties of the main-group elements and π-conjugated systems.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 28","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196719","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}
Aleksandra Hernik, Jorid Smets, Zhe Wang, Yuliya Semenova, Jin-Chong Tan, Rob Ameloot, Izabela Naydenova
{"title":"Optical Detection of Volatile Organic Compounds: A Review of Methods and Functionalized Sensing Materials","authors":"Aleksandra Hernik, Jorid Smets, Zhe Wang, Yuliya Semenova, Jin-Chong Tan, Rob Ameloot, Izabela Naydenova","doi":"10.1002/adom.202500369","DOIUrl":"10.1002/adom.202500369","url":null,"abstract":"<p>With growing awareness of the detrimental effects of volatile organic compounds (VOCs) on human health and their potential in disease screening, the demand for effective detection methods has surged. Optical detectors are highly desirable because of their excellent versatility, fast response time, and suitability for remote detection. This review aims to analyze various optical sensors for VOC detection, focusing on the functionalizing materials used in different optical transducers. The review is organized into six sections, each covering a different sensor category based on the type of optical phenomenon utilized for VOC detection: diffraction, interference, polarization change, optical resonance, absorption, and evanescent wave propagation. Achievable sensitivities, limitations, and advantages of each approach are discussed, providing valuable insights for the development of advanced VOC detection technologies.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 27","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202500369","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145110969","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":"Ultra-Wideband Frequency Beam-Steering Transparent Metasurface Enabled by Fine Metal Line","authors":"Yu Lin, Qi Zou, Yueheng Ning, Jiaming Li, Pei Xiao, Gaosheng Li","doi":"10.1002/adom.202501559","DOIUrl":"https://doi.org/10.1002/adom.202501559","url":null,"abstract":"<p>Optically transparent and ultra-wideband metasurfaces are key enablers for future wireless–optical systems, offering electromagnetic functionality without compromising visible-light transmission. In this work, a flexible and transparent beam-steering metasurface is demonstrated, based on a three-layer fine metal line (FML) network patterned on PET substrates with an interleaved air gap. The metasurface enables linear polarization rotation and broadband phase compensation while achieving high optical transparency (∼70%) and mechanical flexibility. The transmitarray is optimized to steer beams over a broad frequency range from 13 to 32 GHz through passive frequency-dependent phase dispersion. Simulations and measurements confirm consistent beam deflection from 26° to 9°, with a peak gain of 26.03 dBi and stable aperture efficiency above 40%. Conformal simulations demonstrate that beam-steering performance is maintained under bending angles up to 20°, with no degradation in optical or electromagnetic functionality. Combining with ultra-wideband operation, transparency, conformability, and scalable fabrication, the proposed metasurface presents a promising solution for next-generation transparent antennas, radomes, and smart wireless–photonic platforms.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 29","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145284584","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}
Matej Sebek, Tobias Olaf Buchmann, Peter Uhd Jepsen, Simon Jappe Lange
{"title":"On-Chip Control of Electron Emission with an Active Terahertz Metasurface","authors":"Matej Sebek, Tobias Olaf Buchmann, Peter Uhd Jepsen, Simon Jappe Lange","doi":"10.1002/adom.202500104","DOIUrl":"https://doi.org/10.1002/adom.202500104","url":null,"abstract":"<p>Terahertz (THz) radiation has emerged as a powerful tool for inducing ultrafast electron emission and controlling electron beams, with applications in photonics and electron microscopy. Here, the first realization of on-chip electron emission control using an active THz metasurface is reported. The device integrates resonant dipole antennas and bias arms on a fused silica substrate, enabling precise modulation of electron trajectories through electrostatic control. Experimental results, supported by particle-in-cell simulations, reveal that electron emission via Fowler–Nordheim tunneling can be dynamically steered by varying the applied bias. A positive bias suppresses emission by attracting electrons to the bias arms, while a negative bias repels them, allowing trajectory control and the emergence of new emission features. Time-of-flight measurements show distinct shifts in electron emission behavior, with strong correlation to bias voltage and THz field strength. This work demonstrates a practical approach to integrating ultrafast electron control into chip-scale systems.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 28","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202500104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196514","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}
Roland Schäfer, Philipp Weitkamp, Otgonbayar Erdene-Ochir, Klaus Meerholz, Klas Lindfors
{"title":"Polarization-Controlled Strong Light–Matter Interaction With Templated Molecular Aggregates","authors":"Roland Schäfer, Philipp Weitkamp, Otgonbayar Erdene-Ochir, Klaus Meerholz, Klas Lindfors","doi":"10.1002/adom.202500998","DOIUrl":"https://doi.org/10.1002/adom.202500998","url":null,"abstract":"<p>Strong light-matter interaction is demonstrated for a layer of templated merocyanine molecules in a planar microcavity. Using a single layer of graphene nanoribbons as a templating layer, an aligned layer of aggregated molecules is obtained. The molecular layer displays anisotropic optical properties resembling those of a biaxial crystal. The anisotropic excitonic component in the cavity results in strongly polarization-dependent light-matter interaction and in increased Rabi-energies. The increased light-matter interaction is possibly due to reduced molecular disorder in the templated molecular layer. This conclusion is supported by an analysis based on a multi-oscillator model. Photoluminescence microspectroscopy is further used to demonstrate that the light-matter coupling is spatially homogeneous. This study introduces molecular templating to strong light-matter studies. The reduced disorder of the system as a consequence of templating is highly beneficial for engineering light-matter interaction.</p>","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 28","pages":""},"PeriodicalIF":7.2,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202500998","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196512","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}