ACS Photonics最新文献

Electroplex Emission in TADF-Based Organic Light-Emitting Transistors 基于tadf的有机发光晶体管的电相发射

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-18 DOI: 10.1021/acsphotonics.5c01335

Caterina Soldano, Ornella Laouadi, Vladimir Kornienko, Katherine Gallegos-Rosas, Amirhossein Azari

{"title":"Electroplex Emission in TADF-Based Organic Light-Emitting Transistors","authors":"Caterina Soldano, Ornella Laouadi, Vladimir Kornienko, Katherine Gallegos-Rosas, Amirhossein Azari","doi":"10.1021/acsphotonics.5c01335","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c01335","url":null,"abstract":"Thermally activated delayed fluorescence (TADF) offers promising routes to enhance the efficiency of organic light-emitting devices by enabling utilization of both triplet and singlet excitons. In this study, we investigate the performance of multilayer organic heterostructures incorporating the TADF emitter DMAC-DPS blended with CBP, under field-effect charge transport conditions in transistor-based devices. We systematically studied the optical and electronic properties of emissive blends within the device architecture. Two key findings emerge from this study: (a) a DMAC-DPS concentration of 15% yields the highest electroluminescence efficiency, which we attribute to balanced charge transport within the emissive layer, and (b) electrical excitation induces a pronounced red shift in the emission spectrum, suggesting electroplex formation at the interface between the emissive blend and the n-type semiconductor. These results highlight the critical role of balanced charge transport and interfacial interactions for the understanding of light generation mechanisms and overall improvement of the device performances while offering new insights into the design of TADF-based light-emitting transistors.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"66 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pixel-Level Spectral Routers for RGB-IR Sensing 用于RGB-IR传感的像素级光谱路由器

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-18 DOI: 10.1021/acsphotonics.5c01866

Zhiqiu Yan, Zhiqing Zhang, Xin Liu, Zhenyuan Huang, Zhifang Qian, Changgui Lu, Ningfeng Bai, Zhipeng Wu, Qilong Wang

引用次数: 0

An Agentic Framework for Autonomous Metamaterial Modeling and Inverse Design 自主超材料建模与反设计的代理框架

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-18 DOI: 10.1021/acsphotonics.5c01514

Darui Lu, Jordan M. Malof, Willie J. Padilla

引用次数: 0

Multitask Multiplexed Switchable Infrared Optoelectronic Detection Based on Band Switch 基于波段开关的多任务复用可切换红外光电检测

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-18 DOI: 10.1021/acsphotonics.5c01554

Shikun Duan, Jiapeng Hu, Xiangyang Shi, Maohua Chen, Yu Wan, Yuzhuo Bai, Hang Ma, Tiange Zhao, Tengfei Xu, Meng Yuan, Qianwen Zheng, Qing Li, Qisheng Wang, Fang Zhong, Zhen Wang, Lei Liao, Weida Hu

{"title":"Multitask Multiplexed Switchable Infrared Optoelectronic Detection Based on Band Switch","authors":"Shikun Duan, Jiapeng Hu, Xiangyang Shi, Maohua Chen, Yu Wan, Yuzhuo Bai, Hang Ma, Tiange Zhao, Tengfei Xu, Meng Yuan, Qianwen Zheng, Qing Li, Qisheng Wang, Fang Zhong, Zhen Wang, Lei Liao, Weida Hu","doi":"10.1021/acsphotonics.5c01554","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c01554","url":null,"abstract":"The multifunctionality and integration of detection systems have consistently been a primary focus in the development of optoelectronic devices. The structural design of functionally stacked devices facilitates the acquisition of information for complex and diverse detection tasks, significantly enhancing effective information density. However, challenges such as thermal management issues arising from high integration density and signal crosstalk between different tasks pose substantial obstacles for multifunctional detection structures. In this work, we propose a low-power, low-crosstalk, switchable multifunctional detection scheme. The effective reuse of multifunctionality is attributed to the self-isolation and low energy consumption of the three-terminal optional Schottky junction device. The built-in electric field of the Schottky junction effectively blocks majority carriers while facilitating the transport of minority carriers. This enables the device to achieve a noise current of 4.2 × 10–27 A2 Hz–1 without requiring external bias. We demonstrate the system’s real-time edge imaging capability for letter masks and target vehicles, as well as its capacity to identify flammable hydrocarbons at concentrations as low as parts per million (ppm). This low-power, low-crosstalk multifunctional architecture presents a novel approach for the next generation of multifunctional integrated detection systems.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"6 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-Mode Electrically Pumped Liquid Crystal VCSELs with Mode-Hop-Free Tuning over 30 nm 单模电泵液晶VCSELs与模式跳跃自由调谐超过30纳米

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-17 DOI: 10.1021/acsphotonics.5c01687

Ning Cui, Zhanguo Shi, Huihui Wang, Hongzhuo Wang, Jisheng Wang, Tianyao Zhang, Baolu Guan

{"title":"Single-Mode Electrically Pumped Liquid Crystal VCSELs with Mode-Hop-Free Tuning over 30 nm","authors":"Ning Cui, Zhanguo Shi, Huihui Wang, Hongzhuo Wang, Jisheng Wang, Tianyao Zhang, Baolu Guan","doi":"10.1021/acsphotonics.5c01687","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c01687","url":null,"abstract":"Electrically pumped liquid crystal (LC) tunable VCSELs hold transformative potential for optical coherence tomography (OCT), spectroscopy, LiDAR, and high-speed optical communications. However, conventional optical pumping LC systems suffer from bulkiness, inflexibility, and scalability limitations. Herein, we propose a fully electrically pumped LC-tunable VCSEL (ELC-VCSEL) with a three-electrode design and an inner LC-coupled cavity. Through COMSOL simulations and structural optimization, we comprehensively evaluated the effects of mode competition and LC birefringence characteristics on the wavelength tuning range. This device achieves a 30.8 nm mode-hop-free tuning range (1044.5–1075.3 nm) at 3 mA via a precisely designed LC modulation layer that suppresses mode competition. Simultaneously, the proposed ELC-VCSEL exhibits excellent single-mode characteristics, with a side-mode suppression ratio (SMSR) of 33.7 dB and a full width at half maximum (FWHM) of 0.19 nm. By eliminating external pumping to reduce costs and power consumption, the ELC-VCSEL could further expand its practical applicability in electro-optic systems, biomedical sensing, optical communications, and fast-response optical instruments.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"54 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-Dimensional Planar Alignment of Nematic Liquid Crystal by Direct Laser Writing of Nanogratings 激光直接写入纳米光栅的向列液晶三维平面对准

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-16 DOI: 10.1021/acsphotonics.5c01342

Uroš Jagodič, Jaka Pišljar, Andreja Jelen, Miha Škarabot, Igor Muševič

引用次数: 0

Noninvasive Blood Glucose Monitoring via Vein Visualization-Guided Confocal Raman Spectroscopy and Heterogeneous Ensemble Learning 通过静脉可视化引导的共聚焦拉曼光谱和异质集成学习进行无创血糖监测

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-16 DOI: 10.1021/acsphotonics.5c01694

Ming Yang, Mingyuan Liu, Xiaopeng Wang, Haoqian Lv, Yuqing Du, Yongbin Qi, Zijiaqi Wang, Qiang Yang, Qiang Liu

{"title":"Noninvasive Blood Glucose Monitoring via Vein Visualization-Guided Confocal Raman Spectroscopy and Heterogeneous Ensemble Learning","authors":"Ming Yang, Mingyuan Liu, Xiaopeng Wang, Haoqian Lv, Yuqing Du, Yongbin Qi, Zijiaqi Wang, Qiang Yang, Qiang Liu","doi":"10.1021/acsphotonics.5c01694","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c01694","url":null,"abstract":"Raman spectroscopy holds promise for noninvasive glucose monitoring. But its practical implementation is constrained by challenges like imprecise sampling locations, poorly resolved glucose-specific features, and small data sets. To overcome these limitations, venous visualization technology (VVT) is, for the first time, integrated with a confocal Raman spectroscopy (CRS) system to improve spectral sampling precision and quality. Moreover, a stacking ensemble learning framework combining multiple heterogeneous base models is proposed to improve model generalization while mitigating overfitting for accurate glucose prediction. Meanwhile, an internal standard method, combined with the Raman spectrum intelligent augmentation engine and a feature selection-driven stacking model, is employed to expand the effective data set size and optimize model weight allocation. For method validation, regression analysis is conducted on synthetic blood samples and in vivo venous blood glucose, with classification of samples based on varying glucose levels. Results indicate that, for in vitro synthetic blood experiment, the glucose peak area ratio is significantly linearly correlated with concentration, with the regression R2 value reaching 0.9897. For the in vivo transcutaneous test, VVT enhances the accuracy of venous localization by approximately 20%, with the regression R2 between the predicted and reference values reaching 0.928. In the classification experiment, reliable results are obtained for synthetic blood using 2 mmol/L intervals during training; when transitioned to the in vivo transdermal test, transfer learning boosts the accuracy by 2 percentage points to 92% for distinguishing between pre- and postprandial glucose states. These results establish a foundation for the application of AI-based noninvasive glucose monitoring technology.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"123 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent Progresses in Direct Photolithographic Patterning of Quantum Dots 量子点直接光刻成型学研究进展

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-16 DOI: 10.1021/acsphotonics.5c01692

Yifei Liu, Jiayuan Li, Siting Cai, Tingzhu Wu, Zhong Chen, Yue Lin, Shuli Wang

{"title":"Recent Progresses in Direct Photolithographic Patterning of Quantum Dots","authors":"Yifei Liu, Jiayuan Li, Siting Cai, Tingzhu Wu, Zhong Chen, Yue Lin, Shuli Wang","doi":"10.1021/acsphotonics.5c01692","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c01692","url":null,"abstract":"Luminous quantum dots (QDs) are highly attractive materials for advanced display technologies due to their exceptional optical properties, including strong absorption, narrow emission spectra, and high photoluminescence quantum yields. These characteristics enable their use in next-generation microdisplays requiring high brightness, superior color purity, broad color gamut, and fast response times. Among various fabrication techniques, direct photolithographic patterning of QDs stands out as a highly reliable method for creating QD pixel arrays. This approach offers significant advantages in terms of resolution, throughput, response time, scalability, and seamless integration with conventional micro/nanofabrication processes. This review critically examines recent progress in direct photolithographic patterning of QDs for microdisplay applications. We particularly focus on the underlying light-responsive mechanisms of QD surface ligand engineering and the development of QD–polymer composites. Furthermore, we evaluate the performance of the resulting patterned QD microstructures in actual microdisplay applications. Finally, we address the current challenges in practical implementation and propose future directions for the advancement of QD direct lithographic patterning techniques, with the aim of providing valuable insights for continued innovation in this rapidly evolving field.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"66 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Side-Coupled High-Power and High-Speed Ge-on-Si Photodetectors using Lateral Subwavelength Grating Waveguides 侧向亚波长光栅波导侧耦合高功率高速锗硅光电探测器

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-16 DOI: 10.1021/acsphotonics.5c01501

Xiaoyang Zhao, Zhipeng Ma, Shiao Zhao, Hang Liang, Guobiao Tang, Yu Zhang, Jian Wang

{"title":"Side-Coupled High-Power and High-Speed Ge-on-Si Photodetectors using Lateral Subwavelength Grating Waveguides","authors":"Xiaoyang Zhao, Zhipeng Ma, Shiao Zhao, Hang Liang, Guobiao Tang, Yu Zhang, Jian Wang","doi":"10.1021/acsphotonics.5c01501","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c01501","url":null,"abstract":"High-saturation power Ge-on-Si photodetectors are widely used in analog photonics and microwave photonics, serving as key components to convert optical signals to electrical signals. However, the saturation power of the conventional butt-coupled photodiode is typically constrained by the space-charge effect. Here, two side-coupled Ge-on-Si photodetectors assisted by subwavelength grating (SWG) waveguides are proposed and realized. The present photodetectors adopt the side-coupled method, and the SWG waveguides are optimized to eliminate the space-charge effect with high optical power. One of the side-coupled photodetectors, which has a single SWG input waveguide, demonstrated a saturation current of 53.4 mA. The other has two SWG waveguides with bidirectional optical feed and has a saturation current of 41.1 mA. The device exhibits a bandwidth of 53.4 GHz under 5 mA output current. Under a photocurrent of 1 mA, the high-speed open eye diagram for 112 Gbps nonreturn-zero (NRZ) data transmission is demonstrated. And under the photocurrents of 13 and 20 mA, the open eye diagrams for the 56 and 28 Gbps NRZ data transmission are demonstrated, respectively. The present side-coupled Ge-on-Si photodetector shows excellent performance for high power detection compared with the conventional butt-coupled one.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"26 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Photonics-Based Focusing through Multimode Fibers 基于多模光纤的集成光子聚焦

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-10-15 DOI: 10.1021/acsphotonics.5c01814

Filip Milojković, Niels Verellen, Roelof Jansen, Frédéric Peyskens, Xavier Rottenberg, Pol Van Dorpe

{"title":"Integrated Photonics-Based Focusing through Multimode Fibers","authors":"Filip Milojković, Niels Verellen, Roelof Jansen, Frédéric Peyskens, Xavier Rottenberg, Pol Van Dorpe","doi":"10.1021/acsphotonics.5c01814","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c01814","url":null,"abstract":"A breakthrough in endoscopy imaging resolution, coupled with a drastic reduction in its invasiveness, is on the horizon with emerging techniques based on multimode fibers. These imaging techniques rely on illumination wavefront control to deliver diffraction-limited images through a thin multimode fiber (diameter ∼ 100 μm). By controlling the wavefront at the fiber’s input, a grid of focused spots can be raster scanned at the fiber’s end to form an image. However, there’s room for performance improvement in spatial light modulators commonly used for focusing through multimode fibers. The ones based on liquid crystals suffer from low sub-kHz modulation speed, while the other, digital micromirror devices, require an intricate optical setup to achieve preferred phase modulation. We propose a novel approach for focusing through a fiber by employing a photonic integrated circuit to modulate the wavefront, which brings improvements in the modulation rate and the optical setup compactness. Using an optical phased array with 128 antennas, operating at a wavelength of λ = 852 nm, we demonstrate focusing through a graded-index multimode fiber. Spot size as low as 2.3 μm, approaching the diffraction limit, and an average focus power ratio equal to 93% of the theoretical maximum are achieved. Additionally, we demonstrate 2D focus steering at the fiber’s distal end for raster-scan imaging. By focusing in different planes, we show that OPAs can enable volumetric imaging through a multimode fiber. Finally, our device was fabricated on a silicon nitride platform, offering the prospect of large-scale fabrication.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"94 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145295972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0