ACS Photonics最新文献

{"title":"Synthesis of Arbitrary Interference Patterns Using a Single Galvanometric Mirror and Its Application to Structured Illumination Microscopy","authors":"Ke Guo, Abderrahim Boualam, James D. Manton, Christopher J. Rowlands","doi":"10.1021/acsphotonics.5c00516","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00516","url":null,"abstract":"Structured illumination microscopy (SIM) overcomes the diffraction limit of optical microscopy by projecting finely spaced interference fringes with different orientations and phases onto the sample and imaging the result. A major challenge of SIM is to generate the different illumination patterns with a high contrast and switching speed, which commonly requires expensive devices and the sacrifice of illumination power efficiency. We present a new way of generating interference patterns for 2D and 3D SIM achromatically, with high speed and high power efficiency, using only one moving part. The interference patterns are created by a common-path interferometer, with the orientation, polarization, and phase of interference patterns controlled by a single galvanometric mirror. We characterize the contrast and switching speed of the interference patterns and demonstrate their utility by performing high-speed (980 raw frames per second) 2D SIM imaging on fluorescent nanoparticles and 3D SIM on fixed iFluor 488 phalloidin-stained U-2 OS cells.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"38 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144319538","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}

{"title":"Bionic Scotopic-Adaptive Ternary CdSxSe1–x Memory Phototransistor for Weak RGB Light Perception","authors":"Zhibin Shao, Peihao Wu, Ming Wu, Lei Wang, Na Sai, Xingxing Hong, Meng Xu, Jiangfeng Gong, Jiang Yue, Hong Wang","doi":"10.1021/acsphotonics.5c00707","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00707","url":null,"abstract":"Bionic scotopic-adaptive phototransistors, inspired by the rod cells of the human retina, exhibit remarkable potential for enhancing the efficiency of vision systems in diverse applications, including security surveillance, medical imaging, and precision laser machining. Nonetheless, similar to their biological counterparts, these devices face a critical limitation: their scotopic-adaptive photoresponse struggles to comprehensively encompass the visible spectrum, impeding color differentiation under weak illumination. In this study, we present a bionic memory phototransistor (MPT) based on ternary CdS_<i>x</i>Se_1–<i>x</i> nanoribbons, which integrate the scotopic sensitivity of rods with the chromatic acuity of cones to enable RGB color discernment in weak-light conditions. The CdS_<i>x</i>Se_1–<i>x</i> nanoribbons synthesized in a selenium-rich atmosphere exhibit fewer chalcogen vacancies and a progressively reduced photoelectric storage window, confirming the pivotal role of these vacancies as surface oxygen adsorption sites forming a storage medium. By leveraging the charge storage accumulation effect and energy band engineering, we achieve weak light detection across the broad visible range of 300–725 nm, with a specific detectivity surpassing 10¹⁷ Jones. Through the synergistic operation of CdS_0.30Se_0.70, CdS_0.58Se_0.42, and CdS MPTs with tailored spectral properties, we accomplish detection and discrimination of weak RGB light at 200 nW·cm^–2 under scotopic-adaptive modes. This integration of rod-inspired scotopic adaptation with cone-like chromatic discrimination offers an innovative design concept for the development of next-generation visual perception technologies.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"22 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144319539","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}

{"title":"Multicolor Super-Resolution Structured Illumination Microscopy Based on Snapshot Spectral Ghost Imaging via Sparsity Constraints","authors":"Li Chen, Pengwei Wang, Zhentao Liu, Jianrong Wu, Shensheng Han","doi":"10.1021/acsphotonics.5c00435","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00435","url":null,"abstract":"Structured illumination microscopy (SIM) is an important super-resolution microscopic imaging technique owing to its rapid imaging speed, broad imaging field of view, and low phototoxicity. Multicolor fluorescence microscopy can promote the analysis of complex biological structures, optimize medical diagnosis and precise treatment, and reveal the mechanism of chemical reactions and the composition of materials. However, the imaging speed of multicolor SIM is relatively limited, and its spatial resolution improvement remains constrained. In this study, we developed a fast multicolor fluorescence super-resolution microscopic imaging technique that leverages the benefits of snapshot multicolor wide-field super-resolution ghost imaging via sparsity constraints, while further improving the spatial resolution through structured illumination. Its theoretical framework was established based on the intensity correlation theory. The experimental results demonstrated a 2.65-fold spatial resolution enhancement beyond the diffraction limit and a 3-fold temporal resolution improvement over traditional three-color SIM imaging.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"231 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311718","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}

{"title":"Bright-Field Polarimetry of a Single Plasmonic Nanostructure Combining Polarization and Position Modulation Techniques","authors":"Marius Gauchet, Floriane Perrier, Christophe Bonnet, Marie-Ange Lebeault, Emmanuel Cottancin, Jean Lermé, Renaud Bachelot, Jérémie Béal, Safi Jradi, Michel Pellarin","doi":"10.1021/acsphotonics.5c00892","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00892","url":null,"abstract":"Being able to measure the chiroptical properties or more generally the specific response of individual nanoparticles with respect to the polarization of light is a major challenge in the domain of nanophotonics, whether for a fundamental purpose or for understanding and shaping the properties of metamaterials built from these entities. The only few published experiments in this field are essentially dedicated to identifying the signature of circular dichroism. On the basis of conventional methods employed in the polarimetric study of macroscopic samples, we propose an alternative experimental technique which allows a complete determination of the relevant optical anisotropy parameters of a single nano-object (circular and linear dichroisms and birefringences). The retrieval of weak signals from bright-field extinction measurements is made possible by the original combination of polarization and spatial modulation spectroscopies. The framework and applicability of the method and data processing are discussed in detail. They are illustrated through the study of two different types of nanoparticles: achiral homodimers of gold nanospheres and chiral gold nanostructures lithographied on a transparent substrate.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"43 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311720","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}

{"title":"Determination of the Absolute Concentration of Rayleigh Particles via Interferometric Scattering Microscopy","authors":"Il-Buem Lee, Hyeon-Min Moon, Jin-Sung Park, Se-Hwan Lee, Jaewon Lee, Sung Hun Park, Seungwoo Lee, Seok-Cheol Hong, Minhaeng Cho","doi":"10.1021/acsphotonics.5c00736","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00736","url":null,"abstract":"Nanoparticles play vital roles across healthcare, electronics, and energy, where their nanoscale dimensions enable unique functionalities, such as crossing biological barriers to enhance drug delivery. However, this same small size also raises safety concerns, making accurate characterization essential, especially in biomedical applications. Traditional techniques, including dynamic light scattering and mass spectrometry, often fall short in sensitivity, resolution, and versatility. To overcome these limitations, we introduce iCOUNT (interferometric concentration observer and ultrasmall nanoparticle tracker), a method that integrates interferometric scattering (iSCAT) microscopy with deep learning-based particle detection to enable the detection and quantification of nanoparticles smaller than 50 nm (Rayleigh particles, RPs), well below the diffraction limit and in the Rayleigh regime. Our machine learning-based analysis framework facilitates automated, accurate identification and robust tracking of individual RPs from high-frame-rate iSCAT image sequences. This label-free, real-time approach yields multiple key properties of RPs, including size, diffusion coefficients, scattering contrast, and absolute concentration in aqueous environments. iCOUNT reliably detects and tracks dielectric nanoparticles as small as 20 nm in diameter, achieving high spatial and temporal resolutions. We demonstrate its performance by characterizing diverse biological Rayleigh particles, such as immunoglobulin M, simian virus 40, and DNA origami. These results validate the method’s accuracy in size and concentration measurements and uncover single-particle heterogeneity in both optical and dynamic behavior. As a noninvasive optical technique, iCOUNT addresses critical shortcomings of conventional methods and provides a powerful, generalizable platform for nanoparticle analysis in native environments, with broad implications for diagnostics, therapeutics, and nanoscience.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"145 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311719","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}

{"title":"Versatile Ultrafast Single-Shot Imaging","authors":"Alisson Rodrigues de Paula, Saïd Idlahcen, Denis Lebrun, Pierre-Henry Hanzard, Ammar Hideur, Thomas Godin","doi":"10.1021/acsphotonics.5c00917","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00917","url":null,"abstract":"Ultrafast single-shot imaging techniques now reach frame rates of tens of teraframes per second (Tfps) and long sequence depths but are often too complex for large-scale use, in terms of both image acquisition and reconstruction. We propose an extremely simple yet high-performance method that leverages the capabilities of two prominent technologies: acousto-optical pulse shaping and light-field-based hyperspectral imaging. We demonstrate the capabilities of the technique by capturing laser-induced phenomena at frame rates on par with the state-of-the-art and with the potential to reach even higher imaging speeds, while keeping a versatile setup that is easily adaptable to various input pulse shapes and dynamic events. Furthermore, an extra degree of freedom is added to the system through the use of digital in-line holography on the single-shot motion pictures. The agility and performance of this technique could open up new horizons for single-shot imaging techniques, making them accessible to a wider community.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"12 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311985","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}

{"title":"Phase-Dependent Energy Dissipation for Dynamic Emissivity Modulation Using Quantum Dots Near Metallic Surfaces","authors":"Haixiao Xu, Yichi Zhang, Yousheng Zou, Zhi Li, Yu Gu","doi":"10.1021/acsphotonics.5c00315","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00315","url":null,"abstract":"Recent advances in micro- and nanophotonic fabrication techniques have enabled precise control over thermal emissivity, unlocking a variety of intriguing applications. With self-adaptive features, dynamic tunability promises transformative potential but often depends on specialized materials with infrared optical properties responsive to external stimuli, limiting material choices and design flexibility. Herein, we introduce a new framework for dynamic emissivity modulation that exploits the phase-dependent energy dissipation, where the electromagnetic phase controls the amplitude of the total electric field and, consequently, the dissipation rate of the thermal emitter near metallic surfaces. Employing a bilayer system composed of Ag₂Se quantum dots (QDs) and a LiF spacer layer on a metallic substrate, we experimentally demonstrate a tunable range of spectral emissivity (Δϵ_λ) of ∼0.7 and a tunable range of total integrated emissivity in the 8–13 μm waveband (Δϵ) of ∼0.5. The theoretical result also suggests that a dynamic range of the total emissivity as large as 0.6 is feasible by replacing the spacer layer with thermal-responsive polymers, electroelastic materials, magnetoelastic materials, or other phase modulating layers. This design provides a versatile platform for integrating various stimuli-responsive materials to enable dynamically tunable thermal emissivity, paving the way for advanced applications in self-adaptive thermal management and smart thermal systems.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"39 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305160","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}

{"title":"Femtosecond Laser-Induced Refractive Index Modulation of 2D Perovskites for Phase-Modulated Holographic Neural Networks","authors":"Ying Lv, Yi Wei, Shengting Zhu, Jinming Hu, Min Gu, Yinan Zhang","doi":"10.1021/acsphotonics.5c00478","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00478","url":null,"abstract":"Laser direct writing functional optical materials enable high-resolution and optically thin computer-generated holograms with a wide range of applications. However, the traditional material system limits the development of holography technology due to the small refractive index modulation, high optical loss, and complicated preparation process. Perovskite has emerged as competitive candidates because of their superiority in high refractive index, flexible bandgap tunability, and low-cost preparation. Here, we report giant refractive index modulation of perovskites by femtosecond laser direct writing (FsLDW) for applications in holograms and holographic neural networks (HNNs). The interaction mechanism between the femtosecond laser and perovskites is also investigated. Under the precise control of FsLDW, the organic phenylethylamine (PEA) functional groups are reduced, leading to giant refractive index modulation from 0.15 to 1.05 at the broad wavelength range of 519–900 nm, along with geometric thickness reduction. Phase-modulated perovskite holograms and HNNs composed of cascaded holographic plates are demonstrated, greatly expanding the possibilities of perovskite applications in the field of all-optical information encoding.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"625 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305158","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}

{"title":"Ultracompact and Low Crosstalk Multicore Fiber Fan-in/out Device Fabricated via 3D Nanoprinting","authors":"Jinpei Li, Shecheng Gao, Jiajing Tu, Zhaojian Chen, XiFa Liang, QiSui, Zhaohui Li","doi":"10.1021/acsphotonics.5c00617","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00617","url":null,"abstract":"As an optical transmission medium for high-density channels, a multicore fiber (MCF) is being increasingly utilized to enhance the communication capacity of modern systems. The MCF connecting module, also known as the fan-in/fan-out (FIFO) device, is a critical component in these applications. However, the current generation of FIFO devices, typically millimeter-sized, poses challenges for integrating multicore fiber systems seamlessly. In this work, we design and fabricate a 7-channel FIFO device using 3D nanoprinting, exhibiting an insertion loss of 1.72 dB and intercore crosstalk of less than −61.21 dB, with an average insertion loss of 2.23 dB in the C+L band. Remarkably, by utilizing the properties of a 3D printing photonic structure with a high refractive index contrast and the principle of total internal reflection, we achieve efficient and flexible control of the photon propagation direction, significantly reducing the overall size of the device. The total FIFO device has a compact length of just 140 μm. Additionally, the transmission of higher-order modes has also been successfully achieved based on the designed waveguide. The proposed compact FIFO device features low loss, low crosstalk, and broadband capabilities, offering a high-density integration solution for 3D optical interconnection schemes.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"37 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311759","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}

{"title":"Single-Photon Source Monolithically Integrated on a 300 mm Silicon Wafer Using III–V Nano-ridge Engineering","authors":"Davide Colucci, Ulrich Pfister, Reynald Alcotte, Peter Swekis, Michiel De Maeyer, Zhongtao Ouyang, Tom Vandekerckhove, Yves Mols, Robert Langer, Michael Jetter, Simone Luca Portalupi, Peter Michler, Geoffrey Pourtois, Dries Van Thourhout, Bernardette Kunert","doi":"10.1021/acsphotonics.5c00526","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00526","url":null,"abstract":"Single-photon sources (SPSs) are essential for the development of practical quantum technologies, and their integration with silicon photonics is considered the preferred route for scalable implementations. To fully leverage the mature fabrication processes of CMOS foundries, we investigated the use of nano-ridge engineering (NRE) for the monolithic integration of InAs quantum dot (QD)-based SPSs on 300 mm Si wafers. These nano-ridges are made of high-crystal-quality GaAs selectively grown on a trench-patterned wafer, forming waveguides coplanar to the Si chip. The InAs QDs are embedded in these waveguides to form SPSs. In this work, a new device concept and integration approach is presented, showing that beta factors as high as 0.87 can be achieved owing to the high refractive index contrast between GaAs and SiO₂. Then, a first proof of concept is demonstrated. Selective deposition of QDs on top of a diamond-shaped nano-ridge is used to center the dots within the final box-shaped nano-ridge, overgrown after the QD deposition, and to reduce the overall QD density per ridge. The grown QDs showed good spectral properties with line widths as low as 32.7 μeV at 955 nm. The autocorrelation measurements from a selected QD underlines the single-photon nature of the grown structure, with a <i>g</i>²(0) = 0.091 ± 0.005 under nonresonant pulsed excitation. These findings establish a solid foundation for future advancements, including implementing a PIN junction to enhance indistinguishability and extending the emission wavelength to the telecommunication O-band via the growth on InGaAs nano-ridges.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"34 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305159","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}