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Origin, Strength, and Speed of the Nonlinear Optical Response of Transparent Conducting Oxides to Single‐Cycle Optical Pulses 透明导电氧化物对单周期光脉冲非线性光学响应的来源、强度和速度
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-28 DOI: 10.1002/nap2.70272
Ieng‐Wai Un,Subhajit Sarkar,Yonatan Sivan
{"title":"Origin, Strength, and Speed of the Nonlinear Optical Response of Transparent Conducting Oxides to Single‐Cycle Optical Pulses","authors":"Ieng‐Wai Un,Subhajit Sarkar,Yonatan Sivan","doi":"10.1002/nap2.70272","DOIUrl":"https://doi.org/10.1002/nap2.70272","url":null,"abstract":"ABSTRACT We present a first‐principles study of the nonlinear optical response of transparent conducting oxides at the nanoscale due to excitation by intense, extremely short pulses based on a density matrix framework. We identify a strong thermal nonlinearity, which is complemented with stimulated emission and excited‐state absorption; it yields a cumulative permittivity change decorated by quantum coherent oscillations. Further, rigorous calculations under far‐from‐equilibrium conditions show that electron–electron thermalization occurs within a few femtoseconds, supporting interpretations of high‐harmonic generation measurements and in agreement with a generalization of Fermi liquid theory.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"73 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Polarization‐Controlled Wavelength‐Tunable Pulsed Laser Based on Metafiber 基于超光纤的偏振可控波长可调脉冲激光器
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-28 DOI: 10.1002/nap2.70278
Chenxi Zhang,Zanzhu Pan,Chenlu Zhao,Ziyu Gu,Xiuhan Jing,Wenhao Lyu,Jiale Chao,Bo Fu
{"title":"Polarization‐Controlled Wavelength‐Tunable Pulsed Laser Based on Metafiber","authors":"Chenxi Zhang,Zanzhu Pan,Chenlu Zhao,Ziyu Gu,Xiuhan Jing,Wenhao Lyu,Jiale Chao,Bo Fu","doi":"10.1002/nap2.70278","DOIUrl":"https://doi.org/10.1002/nap2.70278","url":null,"abstract":"ABSTRACT Wavelength‐tunable pulsed lasers have the ability to flexibly adjust laser energy and wavelength according to the properties of different materials platforms and experimental requirements, thereby markedly enhancing efficiency and precision. Thus, wavelength‐tunable pulsed lasers have attracted significant attention in fields such as wavelength division multiplexing, precision material processing, and spectroscopic analysis. Here, a polarization‐sensitive Au‐nanorod metasurface has been proposed that integrates saturable absorption with wavelength‐tuning capabilities. By fabricating this metasurface structure on the facet of the fiber, known as a metafiber, low‐loss coupling between the metasurface and the fiber laser system is achieved. In experiments, we have successfully demonstrated Q‐switched pulse, achieving precise control over pulse width (13.5–29.8 μs), repetition rate (15.3–43.7 kHz), and pulse energy (15.2–30.7 nJ) through meticulous adjustment of the pump power. Notably, by modulating the input polarization state, the response wavelength of the metafiber can be effectively controlled, enabling wavelength‐tunable pulsed laser output within a 5‐nm range. This achievement introduces a new concept and provides a viable solution for the design and development of next‐generation compact, high‐efficiency, and multifunctional laser systems.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"35 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Photophysics of Distinguished Defect States in Bi 2 O 2 Se Thin Films bi2o2se薄膜中不同缺陷态的光物理学
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-28 DOI: 10.1002/nap2.70280
Xiaoran Niu,Hao Li,Leyang Dang,Ruoying Pang,Xin Meng,Adeela Nairan,Huarui Sun,Jingkai Qin,Usman Khan,Xiaochuan Xu,Guigen Wang,Feng He
{"title":"Photophysics of Distinguished Defect States in Bi\u0000 2\u0000 O\u0000 2\u0000 Se Thin Films","authors":"Xiaoran Niu,Hao Li,Leyang Dang,Ruoying Pang,Xin Meng,Adeela Nairan,Huarui Sun,Jingkai Qin,Usman Khan,Xiaochuan Xu,Guigen Wang,Feng He","doi":"10.1002/nap2.70280","DOIUrl":"https://doi.org/10.1002/nap2.70280","url":null,"abstract":"ABSTRACT As a leading candidate for next‐generation electronics, high‐performance 2D Bi 2 O 2 Se has garnered significant interest in the scientific community. However, the understanding of its defect mechanisms remains elusive, hindering the development of further functionalities. In this study, we utilized Raman spectroscopy and ultrafast pump–probe experiments to investigate Bi 2 O 2 Se thin films prepared via a solution‐based technique. By comparing carrier decay times under low and high fluences in 25 nm‐ and 115 nm‐thick films, we proposed the defect mechanisms associated with two common defects in the thicker film: Se vacancies and Se–Bi antisites, which exhibit shallow donor and deep donor behaviors, respectively. Additionally, Se–Bi antisites became prominent under higher fluences. Our insights into these defect mechanisms offer valuable guidance for defect engineering in high‐power electronics.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"2 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
High‐Efficiency Acousto‐Optic Modulation on Non‐Suspended Thin‐Film Lithium Tantalate 非悬浮钽酸锂薄膜的高效声光调制
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-28 DOI: 10.1002/nap2.70275
Weiran Zhou,Chengli Wang,Xuqiang Wang,Bowen Chen,Jiachen Cai,Tianyao Yang,Dongchen Sui,Xinjian Ke,Yang Chen,Xudong Wang,Ailun Yi,Shibin Zhang,Chengjie Zuo,Xin Ou
{"title":"High‐Efficiency Acousto‐Optic Modulation on Non‐Suspended Thin‐Film Lithium Tantalate","authors":"Weiran Zhou,Chengli Wang,Xuqiang Wang,Bowen Chen,Jiachen Cai,Tianyao Yang,Dongchen Sui,Xinjian Ke,Yang Chen,Xudong Wang,Ailun Yi,Shibin Zhang,Chengjie Zuo,Xin Ou","doi":"10.1002/nap2.70275","DOIUrl":"https://doi.org/10.1002/nap2.70275","url":null,"abstract":"ABSTRACT Acousto‐optic (AO) interactions provide a powerful interface between the microwave and optical domains, enabling optical switching, non‐reciprocal propagation, and efficient microwave‐to‐optical transduction. Here, we demonstrate high‐efficiency AO modulation on a non‐suspended lithium‐tantalate‐on‐insulator (LTOI) platform. LTOI combines intrinsically low birefringence, a high optical‐damage threshold, strong electro‐optic and Kerr nonlinearities, and favorable acoustic properties. Our Mach–Zehnder interferometers achieve , while racetrack resonators reach , enabling microwave‐to‐optical conversion without suspended structures. Measurements across six in‐plane propagation directions identify propagation along the crystal Z axis as the most efficient tested configuration, where the higher‐order R1 mode produces the strongest MZI response. Temperature‐dependent acoustic measurements and continuous RF‐driven optical testing further demonstrate material‐related operating stability. These results establish non‐suspended LTOI as a robust platform for integrated acousto‐optics with broad applications in communications, signal processing, and quantum information technologies.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"266 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Dynamic Control of Phase Matching in Nonlinear Metasurfaces Using Pancharatnam–Berry Phase 基于Pancharatnam-Berry相位的非线性超表面相位匹配动态控制
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-28 DOI: 10.1002/nap2.70273
Madona Mekhael,Roman Calpe,Tommi K. Hakala,Robert Fickler,Mikko J. Huttunen
{"title":"Dynamic Control of Phase Matching in Nonlinear Metasurfaces Using Pancharatnam–Berry Phase","authors":"Madona Mekhael,Roman Calpe,Tommi K. Hakala,Robert Fickler,Mikko J. Huttunen","doi":"10.1002/nap2.70273","DOIUrl":"https://doi.org/10.1002/nap2.70273","url":null,"abstract":"ABSTRACT Reconfiguring the spectral output of nonlinear metasurfaces after fabrication remains challenging. We address this by exploiting the nonlinear Pancharatnam–Berry phase of ‐symmetric plasmonic metasurfaces. By integrating two metasurfaces inside a multipass cell, we experimentally demonstrate continuous spectral tuning of second‐harmonic generation (SHG) phase‐matching peaks across a 900–970 nm pump range by rotating one metasurface relative to the other. The extracted geometric phase follows the dependence, and a full tuning cycle is completed with of physical rotation. This establishes geometric‐phase metasurfaces as a reconfigurable nonlinear platform, where mechanical rotation enables post‐fabrication and broadband tuning of nonlinear optical responses.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"8 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Vectorial Diffractive Neural Metasurfaces for Multiplexed Synthesis of Optical Skyrmions 面向光学天幕复用合成的矢量衍射神经元曲面
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-28 DOI: 10.1002/nap2.70276
Tianqu Chen,Xu Xing,Mingfeng Xu,Yong Yu,Xi Tang,Yinghui Guo,Fei Zhang,Mingbo Pu,Xiangang Luo
{"title":"Vectorial Diffractive Neural Metasurfaces for Multiplexed Synthesis of Optical Skyrmions","authors":"Tianqu Chen,Xu Xing,Mingfeng Xu,Yong Yu,Xi Tang,Yinghui Guo,Fei Zhang,Mingbo Pu,Xiangang Luo","doi":"10.1002/nap2.70276","DOIUrl":"https://doi.org/10.1002/nap2.70276","url":null,"abstract":"ABSTRACT The synthesis of complex vectorial light fields with nontrivial topological polarization textures requires the coordinated control of spatial amplitude, phase, and polarization. A central challenge is to realize such multidimensional control in a compact physical architecture while retaining multiplexing capability. Here, we propose a vectorial diffractive neural network (VDNN) based on three cascaded metasurfaces for compact passive synthesis of topological vector light fields. By jointly encoding phase and polarization responses across the cascaded layers, the VDNN enables spatially multiplexed generation of multiple skyrmionic and bimeronic states. In a representative design, we demonstrate up to 16 topological textures with numerically evaluated average skyrmion numbers of , and an average orbital angular momentum (OAM) mode purity exceeding . Full‐wave simulations and tolerance analysis further show that this functionality can be preserved under realistic meta‐atom responses and inter‐layer perturbations. This work provides an inverse‐design approach for compact and multiplexed synthesis of complex topological vector light fields for potential applications in free‐space optical communications, particle manipulation, and polarization imaging.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"201 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Scalable Emitter Photonic Integrated Circuits on an Open-Access Indium Phosphide Foundry 开放存取磷化铟铸造厂上的可扩展发射极光子集成电路
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-27 DOI: 10.1002/nap2.70268
Durvasa Y. Gupta,Axel Schoenau,Hendrik Boerma,Shahram Keyvaninia,Patrick Runge
{"title":"Scalable Emitter Photonic Integrated Circuits on an Open-Access Indium Phosphide Foundry","authors":"Durvasa Y. Gupta,Axel Schoenau,Hendrik Boerma,Shahram Keyvaninia,Patrick Runge","doi":"10.1002/nap2.70268","DOIUrl":"https://doi.org/10.1002/nap2.70268","url":null,"abstract":"An open-access indium phosphide platform with high-speed 80 GBaud modulators delivers versatile emitter PICs. By showcasing a widely tunable optical frequency comb generator, a 672 MHz record low-repetition-rate mode-locked extended cavity mode locked laser, and monolithic InP tunable laser with a narrow linewidth of 8.2 kHz, this work presents a pathway to scaled optical communications. Advanced wafer-scale electrical testing and packaging solutions optimize prototype development.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"52 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148821801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Dimensional Synthesis for Emulating Nonlinear Disclination Dynamics 非线性倾斜动力学仿真的尺寸综合
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-26 DOI: 10.1002/nap2.70257
Junqian Wang,Sihong Lei,Daohong Song,Liqin Tang,Shiqi Xia,Zhigang Chen
{"title":"Dimensional Synthesis for Emulating Nonlinear Disclination Dynamics","authors":"Junqian Wang,Sihong Lei,Daohong Song,Liqin Tang,Shiqi Xia,Zhigang Chen","doi":"10.1002/nap2.70257","DOIUrl":"https://doi.org/10.1002/nap2.70257","url":null,"abstract":"(a) Intensity distributions of the 2D disclination lattice under corner-site excitation in the linear (a1), weakly nonlinear (a2), and strongly nonlinear (a3) regimes. (b) Corresponding one-dimensional synthesized lattices (1DSLs) obtained through Lanczos mapping under the same nonlinear regimes. As the nonlinearity increases, the system exhibits distinct nonlinear dynamical behaviors, including linear localization (a1, b2), nonlinear diffusion (a2, b2), and nonlinearity-induced self-localization (a3, b3). The nonlinear dynamics of the 2D disclination lattice and even higher-dimensional lattices can be equivalently represented in the mapped 1DSLs. The mapped 1DSLs faithfully reproduce the essential nonlinear dynamics and mode-coupling pathways, providing a versatile platform for exploring higher-dimensional nonlinear topological phenomena.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"18 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148821935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Inverse-Designed Nanophotonic Structures for On-Chip Excitation and Broadband Emission Extraction in Diamond Quantum Spin Sensing 金刚石量子自旋传感中用于片上激发和宽带发射提取的反设计纳米光子结构
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-25 DOI: 10.1002/nap2.70264
Yuqing Zhou,Tsuyoshi Nomura,Yuki Sato,Makoto Nakai,Paul D. Schmalenberg,Ercan M. Dede
{"title":"Inverse-Designed Nanophotonic Structures for On-Chip Excitation and Broadband Emission Extraction in Diamond Quantum Spin Sensing","authors":"Yuqing Zhou,Tsuyoshi Nomura,Yuki Sato,Makoto Nakai,Paul D. Schmalenberg,Ercan M. Dede","doi":"10.1002/nap2.70264","DOIUrl":"https://doi.org/10.1002/nap2.70264","url":null,"abstract":"Inverse-designed nanophotonic structures on a foundry-compatible silicon nitride chip enable efficient in-plane green excitation and broadband red emission extraction from diamond nitrogen-vacancy centers. A compact emitter triples the guided optical power, while a directional coupler routes ∼80% of the fluorescence to detection, advancing miniaturized on-chip quantum spin sensing.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"14 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148821805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Dynamic Generation of Spatially Variable Vector Beams Using Cascaded Moiré Metasurfaces 利用级联莫尔维尔超表面动态生成空间可变矢量光束
IF 7.5 2区 物理与天体物理
Nanophotonics Pub Date : 2026-08-25 DOI: 10.1002/nap2.70261
Siyu Guo,Zhongzhu Liang,Zhe Wu,Xintong Wei,Shijia Zhu,Junying Liu,Siyu Liu,Qiaohan Liu,Xiaoyan Shi,Fuming Yang,Haiyang Xu
{"title":"Dynamic Generation of Spatially Variable Vector Beams Using Cascaded Moiré Metasurfaces","authors":"Siyu Guo,Zhongzhu Liang,Zhe Wu,Xintong Wei,Shijia Zhu,Junying Liu,Siyu Liu,Qiaohan Liu,Xiaoyan Shi,Fuming Yang,Haiyang Xu","doi":"10.1002/nap2.70261","DOIUrl":"https://doi.org/10.1002/nap2.70261","url":null,"abstract":"A three-layer cascaded moiré metasurface dynamically generates vector beams with tunable polarization order and controllable lateral focal positions. Relative rotation of the first two layers adjusts the conjugate OAM components that form the vector beam, whereas the third layer steers its focus across the transverse plane, preserving the dominant OAM content and polarization topology within the investigated operating range.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"23 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148821802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
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