ACS Photonics最新文献_第5页

Dual Flat Bands Enable Synergistic Excitation–Emission Enhancement in Rare-Earth Ions 双平带实现稀土离子的协同激发-发射增强

IF 6 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 Epub Date: 2026-09-21 DOI: 10.1021/acsphotonics.6c01542

Zhuang Li, Shuizhu Yu, Xianyu Ao

{"title":"Dual Flat Bands Enable Synergistic Excitation–Emission Enhancement in Rare-Earth Ions","authors":"Zhuang Li, Shuizhu Yu, Xianyu Ao","doi":"10.1021/acsphotonics.6c01542","DOIUrl":"10.1021/acsphotonics.6c01542","url":null,"abstract":"Rare-earth ions are pivotal for integratedphotonic light sources,but their low optical transition cross sections inherently limit pumpabsorption efficiency and spontaneous emission rates. Here, we overcomethese drawbacks by designing a dielectric metasurface that supportsdual flat bands, which synergistically enhance both excitation andemission processes. Strong momentum–space anticrossings arisefrom hybridization between transverse-electric-like and transverse-magnetic-likesurface lattice resonances hosted by a TiO2 nanodisk arrayintegrated on a Yb3+-doped Ta2O5 slabwaveguide, giving rise to two spectrally separated flat bands. Theshorter-wavelength flat band resonantly boosts pump absorption, whereasthe longer-wavelength counterpart elevates the radiative decay rateof emitters through the Purcell effect. Angle-resolved measurementscorroborate the dispersion characteristics of these flat bands. Underresonant excitation, we demonstrate a photoluminescence enhancementof over 250-fold, alongside a marked reduction in emission lifetimefrom 0.47 to 0.1 ms. Back-focal-plane imaging further confirms thatthe boosted luminescence aligns with the pre-engineered flat-banddispersion relation. This scheme offers a general route to tailorpump absorption efficiency, radiative decay rate, and emission directivitytoward high-performance rare-earth-ion-based on-chip light sources.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"13 19","pages":"5780–5786"},"PeriodicalIF":6.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149010400","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

Bias-Tunable Broadband Infrared Heterostructure Quantum Ratchet Photodetector 偏置可调谐宽带红外异质结构量子棘轮光电探测器

IF 6 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 Epub Date: 2026-09-25 DOI: 10.1021/acsphotonics.6c01266

Yi Wang, Hanbin Wang, Ning Yang, Weidong Chu, Peng Bai, Yinqiao Li, Gang Song, Jiaxuan Cai, Yan Xie, Meng Chen, Yingxin Wang, Zhanglong Fu, Dixiang Shao, Wenjian Wan, Ziran Zhao, Zhaona Wang

{"title":"Bias-Tunable Broadband Infrared Heterostructure Quantum Ratchet Photodetector","authors":"Yi Wang, Hanbin Wang, Ning Yang, Weidong Chu, Peng Bai, Yinqiao Li, Gang Song, Jiaxuan Cai, Yan Xie, Meng Chen, Yingxin Wang, Zhanglong Fu, Dixiang Shao, Wenjian Wan, Ziran Zhao, Zhaona Wang","doi":"10.1021/acsphotonics.6c01266","DOIUrl":"10.1021/acsphotonics.6c01266","url":null,"abstract":"The development of a photon-type very long-wavelengthinfrared(VLWIR) detector that simultaneously achieves broadband spectral responseand elevated operating temperatures remains a formidable challenge.GaAs/AlGaAs quantum ratchet structures have emerged as a promisingarchitecture to circumvent conventional semiconductor bandgap limitations,enabling multispectral detection while effectively suppressing darkcurrent. In this work, metal-organic chemical vapor deposition (MOCVD)-grownGaAs/AlGaAs heterojunction quantum ratchet photodetectors (QRPDs)are demonstrated. Theoretical and experimental studies of the systemwere conducted to investigate its spectral response and transportproperties. The multiperiod quantum ratchet structure exhibits broadbanddetection covering the near-infrared to very long-wavelength infraredbands. The asymmetric low-dimensional quantum structure also leadsto a photovoltaic-like effect with zero bias response and bias-tunedspectral characteristics. A high peak specific detectivity of 2.4 × 1011 cm·Hz1/2 W–1 was achievedat zero bias. Thanks to the suppression of dark current by the ratchetbarrier, the BLIP temperature of the QRPD reached 40 K. This worknot only demonstrates the significant potential of quantum ratchetdevices for broadband high-temperature operation but also verifiesthe feasibility of MOCVD in the mass production of quantum ratchetdevices, offering a promising solution for cost-effective productiteration and broader application scenarios in photon-type infrareddetection.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"13 19","pages":"5651–5659"},"PeriodicalIF":6.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149049959","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

20.8% PeakExternal Quantum Efficiency of Red (619nm) InGaN/GaN MicroLEDs 红色（619nm） InGaN/GaN微led的峰值外量子效率为20.8%

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 DOI: 10.1021/acsphotonics.6c01611

Roark Chao,Vincent Rienzi,Tanay Tak,Alejandro M. Quevedo,Kent N. Nitta,Justin D. Tan,Shuji Nakamura,James S. Speck,Jon A. Schuller,Steven P. DenBaars

{"title":"20.8% Peak\u0000External Quantum Efficiency of Red (619\u0000nm) InGaN/GaN MicroLEDs","authors":"Roark Chao,Vincent Rienzi,Tanay Tak,Alejandro M. Quevedo,Kent N. Nitta,Justin D. Tan,Shuji Nakamura,James S. Speck,Jon A. Schuller,Steven P. DenBaars","doi":"10.1021/acsphotonics.6c01611","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c01611","url":null,"abstract":"Abstract Red-emitting indium gallium nitride (InGaN) micro-light-emitting diodes (μLEDs) remain challenging due to reduced radiative efficiency at the high indium compositions required for long-wavelength emission. Here, we demonstrate InGaN/GaN red μLEDs emitting at 619 nm that are laterally enclosed by an annular distributed Bragg reflector (DBR) to enhance light extraction. Fully packaged devices exhibit peak external quantum efficiencies as high as 20.8% and wall-plug efficiencies of 13.2%, placing them as the highest-performing planar (non-V-defect engineered) red GaN μLEDs on sapphire substrates reported to date. In addition to high efficiency, the devices demonstrate strong thermal robustness, maintaining &gt;74% of their room-temperature light output at 200 °C under high injection conditions with &lt;8 nm peak wavelength shift. These overall results highlight laterally enclosed reflector architectures as a scalable approach for achieving efficient LED emission and, in conjunction with the natural thermal resilience of GaN devices, enable thermally resilient red μLEDs for applications in optical interconnects, visible-light communication, and next-generation displays.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"92 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091257","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

Wavelength-Selective Coexistence of Interfacial Photogating and Bolometric Effects Enables Polarity-Switchable Tri-Mode Optoelectronic Behaviors in HfS2 Phototransistor 波长选择性共存的界面光和热效应使极性可切换的三模光电行为在HfS2光电晶体管

IF 6 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 Epub Date: 2026-09-04 DOI: 10.1021/acsphotonics.6c01997

Lijian Li, Yun Wei, Liangli Chu, Zhenyu Cheng, Minghao Liu, Peng Wan, Caixia Kan, Daning Shi, Zeng Liu, Mingming Jiang

{"title":"Wavelength-Selective Coexistence of Interfacial Photogating and Bolometric Effects Enables Polarity-Switchable Tri-Mode Optoelectronic Behaviors in HfS2 Phototransistor","authors":"Lijian Li, Yun Wei, Liangli Chu, Zhenyu Cheng, Minghao Liu, Peng Wan, Caixia Kan, Daning Shi, Zeng Liu, Mingming Jiang","doi":"10.1021/acsphotonics.6c01997","DOIUrl":"10.1021/acsphotonics.6c01997","url":null,"abstract":"Conventional neuromorphic vision systems suffer fromarchitecturalfragmentation, wherein sensing, memory, and processing are distributedacross discrete modules, causing high latency, energy waste, and poordynamic adaptability. Here, we present a wavelength-driven trimodalfield-effect phototransistor (TriM-FEP) based on layered HfS2, which offers a new solution to this challenge. This single deviceintegrates polarity-switchable photoresponses and synaptic dynamicswithout external bias or complex circuitry. By simply tuning the incidentwavelength, the TriM-FEP delivers three distinct, dynamically switchablephotoresponses: a synaptic-like photoresponse under solar-blind ultraviolet,fast negative photocurrent in the visible, and fast positive photocurrentin the near-infrared. Notably, this unique polarity reversal and speedvariation are dominated by the photogating effect and the bolometriceffect at different wavelengths, respectively. Beyond fundamentalphysics, the TriM-FEP enables real-time multichannel encrypted opticalcommunication and in-sensor image preprocessing, eliminating the needfor separate computing units. This work transcends the limitationsof multicomponent cooperation, establishing a compact, energy-efficientplatform that unifies sensing, memory, and processing at the devicelevel.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"13 19","pages":"5978–5988"},"PeriodicalIF":6.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148895005","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

Energy-Efficient Sub-Terahertz Photoresponse via Sublattice Magnetic Transition 亚晶格磁跃迁的亚太赫兹高能效光响应

IF 6 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 Epub Date: 2026-09-14 DOI: 10.1021/acsphotonics.6c00877

Hongfei Wu, Xiaokai Pan, Zhaowen Bao, Xiumin Long, Huichuan Fan, Yingdong Wei, Hao Wei, Mingsheng Long, Xiaoshuang Chen, Xiaofang Wang, Guixin Cao, Wei Lu, Lin Wang

{"title":"Energy-Efficient Sub-Terahertz Photoresponse via Sublattice Magnetic Transition","authors":"Hongfei Wu, Xiaokai Pan, Zhaowen Bao, Xiumin Long, Huichuan Fan, Yingdong Wei, Hao Wei, Mingsheng Long, Xiaoshuang Chen, Xiaofang Wang, Guixin Cao, Wei Lu, Lin Wang","doi":"10.1021/acsphotonics.6c00877","DOIUrl":"10.1021/acsphotonics.6c00877","url":null,"abstract":"Theproliferation of ambient electromagnetic radiation with theexplosion of Internet of Things, 6G communication and millimeter-wavesystems calls for the development of broadband, scalable detectorsoperating under ultralow-power conditions. Here, we demonstrate ahigh-performance, self-driven THz photodetector based on the van derWaals ferromagnetic metal Fe5GeTe2. It is elucidatedthat the room-temperature optoelectronic response is predominantlydriven by the photothermoelectric (PTE) effect under zero-bias conditions.The device achieves stable broadband detection (0.02–0.3 THz),an ultrafast response time of 0.83 μs, and excellent linearpower dependence. Especially, we reveal the intriguing optoelectronicbehavior with significant enlargement of magnitude driven by the intrinsicmagnetic phase transition-specifically the magnetic ordering of theFe1 sublattice below 121 K within the already ferromagnetic matrix.As the temperature drops below 121 K, this localized sublattice magnetictransition significantly facilitates the directional transport ofphotogenerated carriers, translating into a substantially augmentedphotoresponse. Furthermore, leveraging this fundamental process ofmagnetic phase-transition as well as the suppressed thermal noise,the intermediate-frequency (IF) signal intensity in heterodyne mixingis remarkably enhanced by the long-range magnetic-ordering, and remainsalmost unchanged near room temperature. Utilizing these exceptionalcapabilities, we successfully constructed a point-to-point communicationlink for the data-transmission of bit-streams and images. This workprovides a novel strategy for a highly integrated, low-power platformfor future high-signal-to-noise-ratio wireless harvester, broadbanddetection.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"13 19","pages":"5591–5600"},"PeriodicalIF":6.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148973633","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

Electrooptic Reflective Metasurfaces for Discrete Beam Deflection 离散光束偏转的电光反射超表面

IF 6 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 Epub Date: 2026-09-18 DOI: 10.1021/acsphotonics.6c01444

Adrine Arshakyan, Torgom Yezekyan, Sergey I. Bozhevolnyi

{"title":"Electrooptic Reflective Metasurfaces for Discrete Beam Deflection","authors":"Adrine Arshakyan, Torgom Yezekyan, Sergey I. Bozhevolnyi","doi":"10.1021/acsphotonics.6c01444","DOIUrl":"10.1021/acsphotonics.6c01444","url":null,"abstract":"Dynamic, electrically controlledoptical metasurfaces are essentialflat-optics components that are intensively being developed for realizingcompact beam steering, optical modulation, and programmable wavefrontcontrol. In this work, we propose a novel metasurface concept enablingdynamic optical beam deflection in reflection by electrically controlleddiffraction-order switching. The device configuration considered consistsof a lithium niobate (LN) electro-optic (EO) layer sandwiched betweena gold back reflector and a grating of gold nanoridges that can beindividually addressed, functioning as control electrodes. Applyinga set of control voltages changes locally, immediately below the goldridges, the LN refractive index through the Pockels effect and reconfiguresthe EO induced diffraction grating configuration. By selectively biasingneighboring ridge electrodes, different EO grating periods can beinduced, generating thereby diffraction orders that are absent inthe unbiased electrode configuration. Numerical optimization of thecavity formed by gold ridges and the back reflector identifies cavity-enhancedoperating conditions at telecom wavelengths, which result in efficientredistribution of reflected radiation into electro-optically induceddiffraction channels. Using realistic system parameters, we numericallydemonstrate the possibility for fast EO switching between four discretefirst-order diffraction angles in the 3–9° range at ∼0.1%efficiency level. We discuss further optimization directions thatwould allow one to expand the accessible angular diffraction spaceand increase the operation efficiency, highlighting potential of theproposed platform for EO beam steering, free-space modulation, andreconfigurable flat optics.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"13 19","pages":"5734–5740"},"PeriodicalIF":6.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149003453","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

Radiation-EnhancedCrosstalk Suppression for SiliconWaveguide Grating Antenna by Harnessing Bound States in the Continuum 利用连续体束缚态抑制辐射增强硅波导光栅天线的串扰

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 DOI: 10.1021/acsphotonics.6c01524

Weiming Yao,Wanchang Gao,Yanmei Li,Rui Li,Yong Yao,Jiazhu Duan,Xiangjie Zhao,Yiqun Zhang,Qinyu Zhang,Jiayin Xue,Yi Zou,Xiaochuan Xu

{"title":"Radiation-Enhanced\u0000Crosstalk Suppression for Silicon\u0000Waveguide Grating Antenna by Harnessing Bound States in the Continuum","authors":"Weiming Yao,Wanchang Gao,Yanmei Li,Rui Li,Yong Yao,Jiazhu Duan,Xiangjie Zhao,Yiqun Zhang,Qinyu Zhang,Jiayin Xue,Yi Zou,Xiaochuan Xu","doi":"10.1021/acsphotonics.6c01524","DOIUrl":"https://doi.org/10.1021/acsphotonics.6c01524","url":null,"abstract":"Abstract Waveguide grating antenna arrays offer an integrated-photonic route to optical beam emission and steering for applications such as free-space optical communication, light detection and ranging (LiDAR), and holographic projection display, but crosstalk between adjacent antennas limits their integration density. In radiative waveguide gratings, crosstalk is not governed solely by evanescent-field coupling; grating-assisted coupling mediated by radiation field can provide an additional contribution. Here, a bound-state-in-the-continuum (BIC)-based approach is proposed and experimentally demonstrated to suppress this contribution. Using quasi-BIC (qBIC)-enabled diffraction engineering, sideward radiation from the grating is selectively suppressed through destructive interference, thereby eliminating the radiation-mediated coupling channels. Compared with non-BIC fishbone grating exhibiting strong sideward radiation, qBIC grating reduces interantenna crosstalk to a level comparable to that of strip waveguide with the same width. As a system-level illustration, qBIC-optimized waveguide gratings are used as the emitting antennas in an optical phased array. The proposed approach highlights qBIC-enabled radiation-channel engineering as a promising route to mitigating crosstalk constraints in the high-density integration of waveguide grating antennas.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"1 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091259","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

Strain-Controlled Polar-Ion Displacement Unlocks Reconfigurable Second-Harmonic Generation in van der Waals CuCrP2S6 应变控制的极性离子位移解锁可重构的范德华二次谐波CuCrP2S6

IF 6 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 Epub Date: 2026-09-10 DOI: 10.1021/acsphotonics.6c01675

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

{"title":"Strain-Controlled Polar-Ion Displacement Unlocks Reconfigurable Second-Harmonic Generation in van der Waals CuCrP2S6","authors":"Xian Zhang, Shikun Hou, Siyu Zhang, Junying Chen, Yixuan Chen, Zimeng He, Jun He, Zongwen Liu, Yanping Liu","doi":"10.1021/acsphotonics.6c01675","DOIUrl":"10.1021/acsphotonics.6c01675","url":null,"abstract":"Two-dimensional van der Waals multiferroics offer a low-dimensionalplatform for tuning nonlinear optical responses through lattice distortionand polar symmetry. Yet translating polar-ion displacement into strongand tunable macroscopic second-harmonic generation (SHG) remains challengingas limited ionic off-centering and interlayer cancellation suppressthe effective nonlinear polarization. Here, we show that local strainenables strongly reconfigurable nonlinear optical responses in CuCrP2S6 by amplifying polar Cu+ displacement.Thickness-dependent measurements reveal nonmonotonic SHG, indicatingincomplete interlayer polarization compensation. Strain-enhanced Cu+ displacement strengthens SHG, while Au-induced near fieldsprovide additional amplification and reorient the polarization axis.Temperature-dependent SHG exhibits a nonmonotonic evolution across140–150 K, consistent with Cu+-related structuralevolution and low-temperature antipolar compensation. Theoreticalcalculations reveal that strain induces Cu-site reconstruction andcharge redistribution, providing microscopic insight into the structuralmechanism underlying strain-modulated SHG response. These resultsestablish strain-controlled ionic displacement as a microscopic routeto tunable nonlinear optics in multiferroics.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"13 19","pages":"5849–5858"},"PeriodicalIF":6.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148933242","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

Physics-Informed Structural Attention Unlocks Efficient and Interpretable Inverse-Designed Photonic Devices 基于物理的结构关注解锁高效和可解释的反向设计光子器件

IF 6 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 Epub Date: 2026-09-19 DOI: 10.1021/acsphotonics.6c01289

Chao Luo, Huiyun Tang, Xiaoyu Chen, Zehao Guan, Yanzhen Li, Wei Li, Ming Li

{"title":"Physics-Informed Structural Attention Unlocks Efficient and Interpretable Inverse-Designed Photonic Devices","authors":"Chao Luo, Huiyun Tang, Xiaoyu Chen, Zehao Guan, Yanzhen Li, Wei Li, Ming Li","doi":"10.1021/acsphotonics.6c01289","DOIUrl":"10.1021/acsphotonics.6c01289","url":null,"abstract":"Photonic inverse design has attractedwidespread attention dueto its advantages in realizing high-performance and compact opticaldevices. Analog metamaterials offer design flexibility through freeformgeometries, but their fabrication requires additional enforcementof minimum feature size constraints. Digital metamaterials providea more manufacturable alternative; however, the discrete nature ofthe design problem imposes a “curse of dimensionality”that renders conventional search methods computationally prohibitive.Moreover, existing methods operate as black boxes, lacking interpretability.To address these limitations, we develop the adjoint-attention optimizationmethod, a digital-metamaterial-based inverse design framework thatleverages physics-informed structural attention to achieve both highefficiency and interpretability. At its core, the structural attentionevaluates the salience of each design unit by acting on adjoint sensitivity,assigning higher scores to design variables whose state transitionsmost strongly improve device performance. We validate the frameworkthrough the design and experimental demonstration of multimode demultiplexers.Numerical results show that the score-based attention concentratesthe discrete search within a low-dimensional subspace, substantiallyreducing computational cost compared with conventional discrete searchmethods. Structural attribution further identifies the functionalhotspot regions that govern device functionality, revealing the low-rankproperty of the design space. Experimental results confirm the highperformance of the fabricated devices across the C-band. The low-loss,low-crosstalk four-mode mode-division multiplexing circuit enableson-chip optical interconnect with single-wavelength transmission of4 modes × 224 Gb/s. This approach establishes a general frameworkfor efficient, interpretable inverse design and marks a step fromblind automation to physics-guided, physically interpretable photonicdevice design.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"13 19","pages":"5660–5673"},"PeriodicalIF":6.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149003454","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

All-Optical Code-Division Multiple Access LiDAR for Large Nonambiguous Range and High Point Acquisition Rate via Time-Stretching 基于时间拉伸的大无模糊距离和高点采集速率的全光码分多址激光雷达

IF 6 1区物理与天体物理

ACS Photonics Pub Date : 2026-10-07 Epub Date: 2026-09-25 DOI: 10.1021/acsphotonics.6c01825

Peng Tian, Shujian Gong, Yinghui Guo, Mingbo Pu, Qi Zhang, Xiaoyin Li, Heping Liu, Renyan Zhang, Jianping Shi, Xiangang Luo

{"title":"All-Optical Code-Division Multiple Access LiDAR for Large Nonambiguous Range and High Point Acquisition Rate via Time-Stretching","authors":"Peng Tian, Shujian Gong, Yinghui Guo, Mingbo Pu, Qi Zhang, Xiaoyin Li, Heping Liu, Renyan Zhang, Jianping Shi, Xiangang Luo","doi":"10.1021/acsphotonics.6c01825","DOIUrl":"10.1021/acsphotonics.6c01825","url":null,"abstract":"Light detection and ranging (LiDAR) have become a keyenablingtechnology for autonomous driving and intelligent manufacturing. Conventionalpulsed time-of-flight LiDAR suffers from an inherent trade-off betweenpoint acquisition rate (PAR) and nonambiguous range, which cannotsatisfy the demands of long-distance high-speed outdoor 3D perceptionsimultaneously. This work presents an all-optical optical code-divisionmultiple access LiDAR assisted by time stretching, which alleviatesthe performance conflict of two core indicators by optimizing theallocation of wavelength-domain coding resources. The system achievesa 55.6 m ambiguity-free detection range and a PAR of 13.46 MHz simultaneously.Outdoor measurements maintain stable millimeter-level ranging precisionwith negligible interchannel crosstalk. Hybrid two-dimensional beamscanning realizes high-fidelity static 3D reconstruction of multidepthtargets, and dynamic imaging at 901 FPS enables precise tracking offast rotating objects. It delivers a much better overall performancethan reported single-detector LiDARs. Abundant idle time slots supportfurther performance upgrading, and the all-optical layout is inherentlycompatible with photonic integration, offering a high-performanceintegrated solution for outdoor, long-range, high-speed 3D perception.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"13 19","pages":"5927–5938"},"PeriodicalIF":6.0,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149049543","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