ACS Photonics最新文献_第2页

BidirectionalPhase Sensitivity in Holographic PhototransientMicroscopy 全息光瞬态显微镜的双向相位灵敏度

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-15 DOI: 10.1021/acsphotonics.6c01684

Emmanuel Kotu Robertson,Dennis van de Lockand,Matz Liebel

{"title":"Bidirectional\u0000Phase Sensitivity in Holographic Phototransient\u0000Microscopy","authors":"Emmanuel Kotu Robertson,Dennis van de Lockand,Matz Liebel","doi":"10.1021/acsphotonics.6c01684","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c01684","url":null,"abstract":"Abstract Mid-infrared photothermal microscopy combines the chemical specificity of infrared absorption with the spatial resolution of visible light detection, but practical implementations face a persistent trade-off between forward-scattering (FWS) and backward-scattering (BWS) detection geometries. FWS provides quantitative, shape-independent phase contrast but requires two-sided optical access, which is difficult to achieve in aqueous or thick samples. BWS offers convenient single-sided access, but its signals are strongly distorted by depth-dependent interference for micrometer-scale objects. Here, we present a bidirectional femtosecond mid-infrared pump–probe holographic microscope capable of switching between FWS and BWS geometries within a single instrument and use it to introduce and validate a new imaging modality, internal forward scattering (IFS). IFS exploits the back reflection generated at the top surface of the mid-infrared-transparent sample substrate as an internally generated forward-scattering illumination wave, isolated from the directly backscattered field via temporal coherence gating. Using polystyrene beads on CaF2 substrates in air, water, and a refractive-index-matched glycerol–water mixture, we show that IFS reproduces the signal magnitudes and temporal dynamics of true FWS measurements while retaining the mechanical simplicity and single-sided accessibility of BWS. These results establish IFS as a practical, quantitative alternative to conventional FWS and BWS geometries for photothermal and, more broadly, quantitative phase imaging, with direct relevance to single-sided imaging of biological or solvent-contained specimens.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"64 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210033","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

Mid-InfraredAll-Optical Wavelength Conversion ofNRZ OOK Signal in Silicon Waveguides 硅波导中nrz OOK信号的中红外全光波长转换

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-15 DOI: 10.1021/acsphotonics.6c00289

Zhiwei Yan,Chang Chang,Xuchen Peng,Guanglian Cheng,Qiyuan Yi,Xinzhe Xiong,Qiyuan Li,Zengfan Shen,Shuang Zheng,Yi Zou,Minming Zhang,Li Shen

{"title":"Mid-Infrared\u0000All-Optical Wavelength Conversion of\u0000NRZ OOK Signal in Silicon Waveguides","authors":"Zhiwei Yan,Chang Chang,Xuchen Peng,Guanglian Cheng,Qiyuan Yi,Xinzhe Xiong,Qiyuan Li,Zengfan Shen,Shuang Zheng,Yi Zou,Minming Zhang,Li Shen","doi":"10.1021/acsphotonics.6c00289","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c00289","url":null,"abstract":"Abstract The escalating demand for data traffic is driving the pursuit of new wavelength bands beyond the conventional telecom windows as a key expansion strategy. The 2 μm waveband is considered a novel communication window with distinct advantages of lower signal loss and broader gain bandwidth. Meanwhile, wavelength conversion is a critical enabler for the next-generation high-speed all-optical networks. In this work, we demonstrate, for the first time, all-optical wavelength conversion of high-speed nonreturn-to-zero on–off keying signals in the 2 μm waveband via four-wave mixing, employing a continuous-wave pump and silicon waveguides fabricated on a standard 340 nm silicon-on-insulator platform. A high conversion efficiency of −12.09 dB is achieved with an input pump power of 21.72 dBm. Facilitated by a pump laser centered at 2008 nm, broadband wavelength conversion is experimentally demonstrated over a conversion span of 314.9 nm. Moreover, wavelength conversion of 10 Gbit/s and 15 Gbit/s data signals is successfully demonstrated, with respective power penalties of 2.56 and 3.95 dB measured at a bit error ratio of 3.8 × 10–3. The promise of the demonstrated mid-infrared wavelength converter for future chip-scale high-speed optical communication is supported by the experimental results.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"29 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210035","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

Row–ColumnAddressable Monolayer Graphene/SiO2/Si HeterostructureArray for Visible-to-Near-Infrared Imagingwith Suppressed Dark Current 行柱可寻址单层石墨烯/SiO2/Si异质结构阵列用于抑制暗电流的可见至近红外成像

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-15 DOI: 10.1021/acsphotonics.6c01818

Shenghan Qin,Peirui Ji,Wenbo Hu,Hanjin Dong,Weihao Tao,Guofeng Zhang,Shuming Yang

{"title":"Row–Column\u0000Addressable Monolayer Graphene/SiO2/Si Heterostructure\u0000Array for Visible-to-Near-Infrared Imaging\u0000with Suppressed Dark Current","authors":"Shenghan Qin,Peirui Ji,Wenbo Hu,Hanjin Dong,Weihao Tao,Guofeng Zhang,Shuming Yang","doi":"10.1021/acsphotonics.6c01818","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c01818","url":null,"abstract":"Abstract Image sensor arrays built from two-dimensional (2D) materials are emerging as enablers of next-generation optoelectronic systems, yet their development has been constrained by the lack of readout architectures specifically tailored to atomically thin channels. Here, we demonstrate an 8 × 8 monolithic array of monolayer graphene/silicon dioxide/silicon (Gr/SiO2/Si) metal-insulator-semiconductor (MIS) photodetector that employs a row–column addressable scheme, drastically reducing the required interconnects from 64 to only 16. By inserting a silicon dioxide dielectric layer between graphene and silicon, the dark current is suppressed by 3 orders of magnitude, and the highest specific detectivity measured among the devices reaches 1.076 × 1011 cm Hz1/2 W–1. All 64 pixels exhibit uniform photoresponse across the visible to near-infrared spectral range. Using mask-projection imaging, we faithfully reconstruct alphabetic optical patterns, confirming the array’s imaging fidelity. This work holds promise for the development of various types of two-dimensional material-based array devices.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"27 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210034","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

Efficient Quasi-Resonant,Polarization-Selective Excitationof GaN Quantum Emitters GaN量子发射体的高效准共振、极化选择激发

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-15 DOI: 10.1021/acsphotonics.6c02170

Nilesh Dalla,Paweł Kulboka,Michał Kobecki,Jan Misiak,Paweł Prystawko,Tomasz Kazimierczuk,Piotr Kossacki,Henryk Turski,Tomasz Jakubczyk

{"title":"Efficient Quasi-Resonant,\u0000Polarization-Selective Excitation\u0000of GaN Quantum Emitters","authors":"Nilesh Dalla,Paweł Kulboka,Michał Kobecki,Jan Misiak,Paweł Prystawko,Tomasz Kazimierczuk,Piotr Kossacki,Henryk Turski,Tomasz Jakubczyk","doi":"10.1021/acsphotonics.6c02170","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c02170","url":null,"abstract":"Abstract Defect centers in gallium nitride (GaN) emerge as bright sources of single photons, which recently have been demonstrated to optically interface a localized spin. However, the structure and composition of these defects as well as their efficient excitation techniques have not been a subject of thorough studies. This work presents evidence that by tuning the excitation laser energy to specific resonance values, the excitation efficiency can be enhanced, resulting in a relative increase of photoluminescence intensity by up to an order of magnitude. The resonances can be selectively addressed with linearly polarized light, while the emission dipoles remain unchanged, enabling polarization-controlled enhancement. These results establish an efficient method of excitation for GaN-based emitters, thereby increasing the generation rate of photons. The data are consistent with excitation via localized vibrational modes (LVMs) associated with point-defect complexes, establishing a practical quasi-resonant route to brighter, polarization-addressable operation of GaN defect emitters and clarifying their energy-level structure.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"32 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210474","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

Turbulence-InvariantPolarization Readout via Spin-DependentAngular Mapping 通过自旋依赖角映射的湍流不变偏振读出

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-14 DOI: 10.1021/acsphotonics.6c02024

Chaoxu Chen,Yuan Wei,Fang Dong,Haoyu Zhang,Ouhan Huang,Ziwei Li,Fang Wei,Wei Chu,Haiwen Cai,Nan Chi,Junwen Zhang,Jianyang Shi

{"title":"Turbulence-Invariant\u0000Polarization Readout via Spin-Dependent\u0000Angular Mapping","authors":"Chaoxu Chen,Yuan Wei,Fang Dong,Haoyu Zhang,Ouhan Huang,Ziwei Li,Fang Wei,Wei Chu,Haiwen Cai,Nan Chi,Junwen Zhang,Jianyang Shi","doi":"10.1021/acsphotonics.6c02024","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c02024","url":null,"abstract":"Abstract Atmospheric turbulence disrupts spatial coherence in free-space optical (FSO) systems, fundamentally limiting the reliable extraction of optical information encoded in intensity, phase, or spatial degrees of freedom. While polarization is intrinsically immune to scalar turbulence, its robust detection remains challenging due to the lack of turbulence-invariant observables. Here, we establish a general spin-dependent phase-difference-to-angle (PDA) mapping mechanism that converts polarization states into global angular intensity modulations, forming a class of turbulence-invariant observables accessible via intensity-only detection. This mapping, enabled by spin–orbit coupling in a vortex waveplate, eliminates the need for wavefront reconstruction and preserves information integrity under strong turbulence. We experimentally validate turbulence-invariant polarization readout over an equivalent long-distance FSO link under both weak and strong turbulence, achieving error rates below 2%. Leveraging this invariant readout, we further demonstrate a 100-Gbps-class orbital angular momentum polarization shift keying (OAMPolSK) communication scheme, with a 12.43-dB reduction in the required optical power compared with PAM-6 at a reference SER of 0.1 under the implemented experimental configurations. Our results demonstrate a turbulence-resilient optical information extraction strategy, in which polarization information is mapped onto a robust angular observable, offering a potential approach for optical communication and sensing in complex environments.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"17 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210091","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

Near-FlatbandResonances in Bilayer Moiré Superlatticesfor Visible-to-Infrared Meta-Optics 可见光-红外元光学中双层莫尔纳米超晶格的近平坦带共振

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-14 DOI: 10.1021/acsphotonics.6c01011

Yiran Gu,Phillippe Pearson,Zhaowei Dai,Owen Miller,Andrei Faraon

{"title":"Near-Flatband\u0000Resonances in Bilayer Moiré Superlattices\u0000for Visible-to-Infrared Meta-Optics","authors":"Yiran Gu,Phillippe Pearson,Zhaowei Dai,Owen Miller,Andrei Faraon","doi":"10.1021/acsphotonics.6c01011","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c01011","url":null,"abstract":"Abstract Flat photonic bands enable extreme light confinement, slow-light effects, and angle-robust resonances that are valuable for meta-optics and integrated photonics. Here we report the design, fabrication, and experimental characterization of 1D Moiré superlattices formed by two closely spaced dielectric gratings with slightly mismatched periodicities. Using temporal coupled-mode theory and numerical simulations, we demonstrate that the guided modes fold and hybridize into nearly flat bands across the entire Brillouin zone. We develop an atomic layer deposition-based process to fabricate multilayer TiO2/air metasurfaces with controlled interlayer gaps and a high refractive-index contrast from visible to near-infrared. Experimental transmission spectra confirm a resonance with a resonance shift Δλ of 3.5 nm around a center wavelength of 1538 nm over an incidence-angle range of ±24◦. We further numerically demonstrate a wide-angle, wavelength-selective waveguide coupler with 32° angular bandwidth and a 0.9 nm resonance shift around 1447 nm. Our results establish TiO2 Moiré superlattices as a versatile platform for angle-robust waveguide couplers and AR/VR photonic devices, combining light-confining resonances with scalable fabrication.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"1 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210037","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

The Magneto-OpticalActivity of Any Dipolar ParticleHas a Universal Upper Bound 任何偶极粒子的磁光活度都有一个普遍的上界

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-13 DOI: 10.1021/acsphotonics.6c01073

Jorge Olmos-Trigo

引用次数: 0

Can Second-OrderNonlinearity in Metal–DielectricMetamaterials Pave the Way toward Elusive Photonic Time Crystals? 金属介电超材料中的二阶非线性能否为难以捉摸的光子时间晶体铺平道路？

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-13 DOI: 10.1021/acsphotonics.6c01918

Jacob B. Khurgin

引用次数: 0

Twist-ProgrammableExciton Polarization through DualAnisotropic Proximity in CrOCl/WSe2/CrOCl Heterostructures CrOCl/WSe2/CrOCl异质结构中双各向异性接近的扭转可编程激子偏振

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-13 DOI: 10.1021/acsphotonics.6c01717

Yixuan Chen,Xian Zhang,Shikun Hou,Siyu Zhang,Junying Chen,Jun He,Zongwen Liu,Yanping Liu

{"title":"Twist-Programmable\u0000Exciton Polarization through Dual\u0000Anisotropic Proximity in CrOCl/WSe2/CrOCl Heterostructures","authors":"Yixuan Chen,Xian Zhang,Shikun Hou,Siyu Zhang,Junying Chen,Jun He,Zongwen Liu,Yanping Liu","doi":"10.1021/acsphotonics.6c01717","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c01717","url":null,"abstract":"Abstract Polarization control in atomically thin semiconductors enables optical information to be encoded beyond intensity and energy. In group-VI transition metal dichalcogenides (TMDs), however, the high in-plane lattice symmetry suppresses excitonic linear polarization, and symmetry breaking from a single van der Waals interface typically provides only weak, weakly programmable anisotropy. Here we create a dual-interface anisotropic proximity platform by sandwiching monolayer WSe2 between two low-symmetry antiferromagnetic CrOCl crystals with controlled relative orientation. When the CrOCl crystallographic axes are nearly aligned, the two interfaces act cooperatively and enhance the degree of linear polarization of WSe2 excitons by a factor of 4–6 relative to single-interface structures. Rotating the CrOCl axes drives a continuous evolution from constructive enhancement to near cancellation, following a cosine-like dependence captured by a Stokes-vector superposition model. An out-of-plane magnetic field further reconfigures the anisotropy through the antiferromagnetic-to-ferrimagnetic transition of CrOCl, yielding a nonmonotonic polarization response. First-principles calculations show that the dual interface strengthens charge redistribution and amplifies W–Se bond distortion by approximately 3-fold. These results establish multi-interface anisotropy engineering as a programmable strategy for controlling exciton polarization in van der Waals semiconductors.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"22 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210042","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

Microscopic Understanding of V-Shaped Pits Induced Quantum Barriers and Localized-State Luminescence in High-Indium-Content InGaN/GaN Multiple-Quantum-Well LEDs 高铟InGaN/GaN多量子阱led中v形坑诱导量子势垒和局域态发光的微观理解

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-13 DOI: 10.1021/acsphotonics.6c01780

Xinye Fan,Wanggui Ye,Debao Zhang,Xuguang Cao,Sicheng Liu,Ke Yu,Zhenghao Guo,Jiqiang Ning,Hoi Wai Choi,Shijie Xu

{"title":"Microscopic Understanding of V-Shaped Pits Induced Quantum Barriers and Localized-State Luminescence in High-Indium-Content InGaN/GaN Multiple-Quantum-Well LEDs","authors":"Xinye Fan,Wanggui Ye,Debao Zhang,Xuguang Cao,Sicheng Liu,Ke Yu,Zhenghao Guo,Jiqiang Ning,Hoi Wai Choi,Shijie Xu","doi":"10.1021/acsphotonics.6c01780","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c01780","url":null,"abstract":"In this study, microstructural characterization with high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), variable-temperature steady-state and time-resolved photoluminescence (PL), PL-excitation spectral measurements, and calculations based on the newly developed quantum many-body localized-state ensemble (MB-LSE) luminescence theory were systematically conducted on high-indium-content InGaN/GaN multiple-quantum-well light-emitting diodes (MQW LEDs). Based on the atomic-number Z dependence of the image contrast, an analytical expression was advocated to estimate the localized-state distribution of InGaN alloys from STEM images of typical V-shaped pits. Central energies of the localized states in the right vicinity region and the bottom MQW region of a V-shaped pit were determined to be 2.80 and 2.20 eV, respectively. Calculations of variable-temperature PL spectra and lifetimes with the MB-LSE model led to elucidation of two critical energies (∼2.886 and 2.217 eV): the central energy of overall localized-state distribution and quantum tunneling energy dominating luminescence thermal behaviors, respectively. The study thus sheds some light on the complicated luminescence mechanism of high-indium-content InGaN/GaN MQW LEDs with many V-shaped pits.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"54 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149151964","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