ACS Photonics最新文献_第2页

Spatially Controlled All-Optical Switching of Liquid-Crystal-Empowered Metasurfaces 液晶供电超表面的空间可控全光开关

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-21 DOI: 10.1021/acsphotonics.4c02029

Maximilian Beddoe, Sarah L. Walden, Slobodan Miljevic, Dmitry Pidgayko, Chengjun Zou, Alexander E. Minovich, Angela Barreda, Thomas Pertsch, Isabelle Staude

{"title":"Spatially Controlled All-Optical Switching of Liquid-Crystal-Empowered Metasurfaces","authors":"Maximilian Beddoe, Sarah L. Walden, Slobodan Miljevic, Dmitry Pidgayko, Chengjun Zou, Alexander E. Minovich, Angela Barreda, Thomas Pertsch, Isabelle Staude","doi":"10.1021/acsphotonics.4c02029","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02029","url":null,"abstract":"Embedding metasurfaces in liquid crystal (LC) cells is a promising technique for realizing tunable optical functionalities. Here, we demonstrate spatially controlled all-optical switching of the optical response of a homogeneous silicon nanocylinder metasurface featuring various Mie-type resonances in the spectral range between 670 and 720 nm integrated in a nematic LC cell. The initial alignment of the LC molecules is controlled by photoalignment layers, where the alignment direction is defined by homogeneous exposure with linearly polarized light at a 450 nm wavelength. Exposure of the photoalignment layer with the same light, whose polarization is rotated by 90°, induces a local change in the direction of the LC alignment and modulates the optical response of the metasurface. The resulting spatially dependent optical properties of the metasurface system are characterized by hyperspectral imaging. The described technique allows the nonvolatile creation of complex spatio-spectral response functions with a spatial resolution of 20 μm. Moreover, we demonstrate that the response of the LC-integrated metasurface can be switched multiple times by subsequent exposures with alternating orthogonal polarizations. Finally, we show that the images can be temporarily erased by heating the sample above the critical LC transition temperature, where the LC transitions to its isotropic phase. The demonstrated approach represents the controlling-light-by-light concept, an alternative to electro-optical or electromechanical control methods, which require complicated electronic architectures for spatially resolved modulation. Our results hold significant potential for applications such as next-generation displays or spatial light modulators that require spatial control of a tunable, tailored optical response.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"72 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142990812","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

Direct on-Chip Optical Communication between Nano Optoelectronic Devices 纳米光电器件之间的片上直接光通信

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-21 DOI: 10.1021/acsphotonics.4c01375

Vidar Flodgren, Abhijit Das, Joachim E. Sestoft, David Alcer, Thomas K. Jensen, Hossein Jeddi, Håkan Pettersson, Jesper Nygård, Magnus T. Borgström, Heiner Linke, Anders Mikkelsen

{"title":"Direct on-Chip Optical Communication between Nano Optoelectronic Devices","authors":"Vidar Flodgren, Abhijit Das, Joachim E. Sestoft, David Alcer, Thomas K. Jensen, Hossein Jeddi, Håkan Pettersson, Jesper Nygård, Magnus T. Borgström, Heiner Linke, Anders Mikkelsen","doi":"10.1021/acsphotonics.4c01375","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01375","url":null,"abstract":"On-chip optical communication between individual nano optoelectronic components is important to reduce the footprint and improve energy efficiency of photonic neuromorphic solutions. Although nanoscale photon emitters and receivers have been reported separately, communication between them remains largely unexplored. We demonstrate direct on-chip directional broadcasting of light between individual InP nanowire photodiodes on silicon. The performance of multiple wire-to-wire communication circuits is mapped, demonstrating robust performance with up to 5 bit resolution as needed in biological networks and a minimum component driving power for continuous operation of 0.5 μW which is below that of conventional hardware. The results agree well with theoretical modeling that allows us to understand network performance limits and identify where significant improvements could be achieved. We estimate that an energy per operation of ∼1 fJ and signal fan-out from one emitter to hundreds of other nodes is possible. We find that the nanowire circuit performance parameters can satisfy the quantitative requirements to run the tasks of neural nodes in a bioderived neural network for autonomous navigation.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"57 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142990742","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

Approaching Upper Bounds to Resonant Nonlinear Optical Susceptibilities with Inverse-Designed Quantum Wells 用反设计量子阱逼近共振非线性光学磁化率的上界

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-21 DOI: 10.1021/acsphotonics.4c01892

Hao Li, Theodoros T. Koutserimpas, Francesco Monticone, Owen D. Miller

引用次数: 0

Cavity–Waveguide Coupling Modulation via an Optical Analogue of Superradiance in Microring Arrays 基于微环阵列超辐射光学模拟的腔波导耦合调制

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-18 DOI: 10.1021/acsphotonics.4c02030

Andrew Tang, Romil Audhkhasi, Abhi Saxena, Virat Tara, Geun Ho Ahn, Jelena Vučković, Arka Majumdar

{"title":"Cavity–Waveguide Coupling Modulation via an Optical Analogue of Superradiance in Microring Arrays","authors":"Andrew Tang, Romil Audhkhasi, Abhi Saxena, Virat Tara, Geun Ho Ahn, Jelena Vučković, Arka Majumdar","doi":"10.1021/acsphotonics.4c02030","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02030","url":null,"abstract":"The limitation on the modulation speed of a cavity-based optical modulator posed by cavity linewidth can be circumvented by modulating the coupling rate to the cavity. However, most coupling modulation methods cannot control this coupling rate in isolation to the cavity’s refractive index. Here, we report a method to purely modulate the coupling rate by exploiting an optical analogue of superradiance in an array of bidirectionally interacting microring cavities. Unlike existing coupling modulation schemes, our method does not require a perturbation of the cavity or the cavity–waveguide coupling region. We experimentally demonstrate coupling rate tuning in two- and three-resonator systems with a modulation range of ∼1.5 times the coupling rate of a single resonator. Both systems exhibit a linear scaling of their overall coupling rates with the number of resonators, providing direct evidence for the existence of superradiance. Furthermore, we validate the optical response of the coupled microring systems using temporal coupled mode theory. The results presented in this manuscript provide avenues for developing the next generation of highly efficient and ultrafast electro-optic modulators.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"44 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142989123","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

Microfabricated Active Laser Noise Suppression Device for a High-Sensitivity Diamond Quantum Magnetometer 用于高灵敏度金刚石量子磁力计的微加工主动激光噪声抑制装置

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-18 DOI: 10.1021/acsphotonics.4c01825

Nan Wang, Yichen Liu, Yongquan Su, Xiao Peng, Yuqiang Hu, Qihui Liu, Fei Xie, Yaochen Zhu, Xin Chen, Xin Luo, Yonggui Zhang, Lihao Wang, Maoheng Jing, Chun Li, Shaoxiong Nie, Hao Chen, Zhenyu Wu, Jiangong Cheng

{"title":"Microfabricated Active Laser Noise Suppression Device for a High-Sensitivity Diamond Quantum Magnetometer","authors":"Nan Wang, Yichen Liu, Yongquan Su, Xiao Peng, Yuqiang Hu, Qihui Liu, Fei Xie, Yaochen Zhu, Xin Chen, Xin Luo, Yonggui Zhang, Lihao Wang, Maoheng Jing, Chun Li, Shaoxiong Nie, Hao Chen, Zhenyu Wu, Jiangong Cheng","doi":"10.1021/acsphotonics.4c01825","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01825","url":null,"abstract":"Nitrogen vacancy (NV) centers in diamonds have emerged as one of the most promising candidates for magnetic field sensing. However, the laser intensity fluctuation is coupled to the diamond fluorescence; thus, the sensitivity is severely affected by the noise and stability of the laser. Integrating both the diamond quantum sensor and laser noise suppression device is a crucial step toward miniaturization and practical applications. Here, we present a piezoelectric-driven device to dynamically adjust the laser noise cancelation with dimensions of 5 × 5 × 1.5 mm3 based on a grating interferometer. This device incorporates a grating structure to produce diffracted reference light with high-accuracy intensity modulation, actively tracking the fluorescence signal for differential common-mode rejection (CMR), effectively eliminating laser noise in the system, whereby the sensitivity of magnetic field detection is increased by a factor of 34, reaching 160 pT · Hz–1/2, and beneficial to the long-term stability. The compact design of this laser noise suppressor, in combination with a miniaturized diamond magnetometer, demonstrates its potential for high-precision magnetic field detection ability and strong portability.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"5 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142989601","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

Photonic Spiking Reservoir Computing System Based on a DFB-SA Laser for Pattern Recognition 基于DFB-SA激光模式识别的光子峰值库计算系统

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-17 DOI: 10.1021/acsphotonics.4c02079

Zhiwei Dai, Xingxing Guo, Shuiying Xiang, Hanxu Zhou, Yuna Zhang, Yahui Zhang, Yanan Han, Changjian Xie, Tao Wang, Yuechun Shi, Yue Hao

{"title":"Photonic Spiking Reservoir Computing System Based on a DFB-SA Laser for Pattern Recognition","authors":"Zhiwei Dai, Xingxing Guo, Shuiying Xiang, Hanxu Zhou, Yuna Zhang, Yahui Zhang, Yanan Han, Changjian Xie, Tao Wang, Yuechun Shi, Yue Hao","doi":"10.1021/acsphotonics.4c02079","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02079","url":null,"abstract":"In the field of information processing, traditional computing methods encounter limitations in handling increasingly complex tasks and meeting growing performance requirements. Reservoir computing, as a new computing paradigm, has demonstrated excellent performance in time series prediction tasks. However, traditional photonic reservoir computing still needs improvement in certain aspects, such as high computational complexity and relatively high-power consumption for information processing. In our work, a photonic spiking reservoir computing system based on a single distributed feedback laser with saturable absorber (DFB-SA laser) is demonstrated numerically and experimentally. Owing to the advantages of DFB-SA, the system is easy to manufacture, has faster response time, and better control over gain current and reverse voltage. Compared to traditional continuous signals, pulse emission requires less energy, helping to reduce system power consumption. The reported system effectively implements DFB-SA based spiking reservoir computing and shows its successful application in complex nonlinear classification tasks. The system achieves favorable performance with lower input dimensionality, opening new avenues for future processing systems based on spiking reservoir computing machines integrated with laser saturable absorption regions and providing a new approach for lightweight system architectures.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"9 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142989599","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

Terahertz Coding Metasurface with Low-Switch-Ratio for Rapid 1-bit Phase Modulation and Beam Steering 用于快速1位相位调制和波束控制的低开关比太赫兹编码超表面

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-17 DOI: 10.1021/acsphotonics.4c02006

Tianyang Song, Feng Lan, Luyang Wang, Hongxin Zeng, Shixiong Liang, Munan Yang, DongFang Shen, Wenxin Liu, Shengxiao Jin, Zhongbo Zhu, Pinaki Mazumder, Yaxin Zhang, Ziqiang Yang

{"title":"Terahertz Coding Metasurface with Low-Switch-Ratio for Rapid 1-bit Phase Modulation and Beam Steering","authors":"Tianyang Song, Feng Lan, Luyang Wang, Hongxin Zeng, Shixiong Liang, Munan Yang, DongFang Shen, Wenxin Liu, Shengxiao Jin, Zhongbo Zhu, Pinaki Mazumder, Yaxin Zhang, Ziqiang Yang","doi":"10.1021/acsphotonics.4c02006","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02006","url":null,"abstract":"With the advent of 6G terahertz technology, the demand for high-performance beam steering devices for terahertz waves is growing increasingly urgent. Terahertz reconfigurable intelligent surfaces (RIS) offer advantages such as low cost, high integration, extensive scalability, and flexible manipulation, making them a critical technology for enabling ultralow latency, high reliability, and dynamic adaptation in integrated terahertz wireless communication and sensing paradigms. A significant challenge hindering the widespread deployment of terahertz RIS is the limited performance of binary phase modulation, particularly the inadequate switch ratio and slow response speed of terahertz switches. This study presents a novel high-electron-mobility transistor (HEMT)-based coding metasurface operating under a low switch ratio for rapid 1-bit phase modulation and beam steering. Unlike traditional metasurface phase-shift schemes, the proposed meta-element facilitates frequency-agile phase modulation through HEMT-controlled LC-dipolar resonance shifts with a low on–off switch ratio. Verified through electromagnetic simulations, surface admittance analysis, and experimental results, the 32 × 32 prototype demonstrated a continuous 360° phase shift in the 0.32–0.40 THz range and 1-bit coding dual-beam steering at −39°/+37° and −30°/+28°. Thanks to its sensitive phase modulation characteristics, the meta-device operates with a switch ratio of 2 (ON/OFF 2-dimensional electron gas density ratio), achieving a 180° phase jump at 0.358 THz with an average reflectance of −8.5 dB and a response speed of 100 MHz. This low-switch-ratio design can potentially enhance terahertz RIS performance in terms of power efficiency, compact integration, and real-time adjustment capabilities.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"26 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142989124","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

Surface Phonon Polariton Ellipsometry 表面声子极化子椭圆偏振

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-16 DOI: 10.1021/acsphotonics.4c01790

Giulia Carini, Richarda Niemann, Niclas Sven Mueller, Martin Wolf, Alexander Paarmann

{"title":"Surface Phonon Polariton Ellipsometry","authors":"Giulia Carini, Richarda Niemann, Niclas Sven Mueller, Martin Wolf, Alexander Paarmann","doi":"10.1021/acsphotonics.4c01790","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01790","url":null,"abstract":"Surface phonon polaritons (SPhPs) have become a key ingredient for infrared nanophotonics owing to their long lifetimes and the large number of polar dielectric crystals supporting them. While these evanescent modes have been thoroughly characterized by near-field mapping or far-field intensity measurements over the past decade, far-field optical experiments also providing phase information are less common. In this Article, we study surface phonon polaritons at the gallium phosphide (GaP)–air interface in the momentum domain using the Otto-type prism coupling geometry. We combine this method with spectroscopic ellipsometry to obtain both amplitude and phase information on the reflected waves across the entire reststrahlen band of GaP. By adjusting the prism–sample air gap width, we systematically study the dependence of the ellipsometry parameters on the optical coupling efficiency. In particular, we show that the combined observation of both ellipsometry parameters, amplitude and phase, provides a powerful tool for the detection of SPhPs, even in the presence of high optical losses. Finally, we theoretically study how surface phonon polariton ellipsometry can reveal the emergence of vibrational strong coupling through changes in the topology of their complex plane trajectories, opening up a new perspective on light–matter coupling.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"74 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142986046","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

Engineering Carbon Nanotube Saturable Absorber for Boosting Repetition Rate in a Harmonic Mode-Locked GHz Soliton Fiber Laser 提高谐波锁模GHz孤子光纤激光器重复频率的工程碳纳米管可饱和吸收器

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-15 DOI: 10.1021/acsphotonics.4c02145

Qianqian Huang, Lilong Dai, Bo Zhang, Kai Wang, Mohammed Al Araimi, Aleksey Rozhin, Chengbo Mou

{"title":"Engineering Carbon Nanotube Saturable Absorber for Boosting Repetition Rate in a Harmonic Mode-Locked GHz Soliton Fiber Laser","authors":"Qianqian Huang, Lilong Dai, Bo Zhang, Kai Wang, Mohammed Al Araimi, Aleksey Rozhin, Chengbo Mou","doi":"10.1021/acsphotonics.4c02145","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02145","url":null,"abstract":"GHz femtosecond fiber lasers are being developed to meet the demands of state-of-the-art applications such as high-speed optical communication and ablation-cooled material removal. Harmonic mode locking (HML) opens a portal to generate GHz ultrashort pulses. However, the impact of a saturable absorber (SA) in controlling the laser repetition rate has long been overlooked. Herein, we successfully boost the repetition rate of the HML laser to ∼10 GHz by engineering the nonlinear optical absorption of film-type single-walled carbon nanotube (SWCNT) SA. Our study first reports a new inhibition for HML repetition rate enhancement, the transition from HML to noise-like pulse (NLP) due to reverse saturable absorption (RSA) of SA, and reveals that the optimum SA for HML repetition rate enhancement should be characterized by low effective modulation depth without RSA. Employing SWCNT-SA with ∼0.4% effective modulation depth, we demonstrate the achievement of 9.25 GHz pulses at the 914th harmonic order in a soliton fiber laser. This represents, to the best of our knowledge, the highest HML repetition rate reported for a physical SA mode-locked fiber laser. Our findings may provide general guidelines for the configuration of practical HML fiber laser while opening the possibility for versatile GHz ultrafast laser sources.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"41 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142986048","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

Comparative Study of Two Different Quasi-Type II Heterostructured Quantum Dots for Enhanced Electroluminescence 两种准II型异质结构量子点增强电致发光的比较研究

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-01-15 DOI: 10.1021/acsphotonics.4c01995

Namyoung Gwak, Minwoo Lee, Seongchan Kim, Seungki Shin, Yunseo Lee, Jihyoun Roh, Inyoung Jeong, Jaeyoung Seo, Jina Na, Nuri Oh

{"title":"Comparative Study of Two Different Quasi-Type II Heterostructured Quantum Dots for Enhanced Electroluminescence","authors":"Namyoung Gwak, Minwoo Lee, Seongchan Kim, Seungki Shin, Yunseo Lee, Jihyoun Roh, Inyoung Jeong, Jaeyoung Seo, Jina Na, Nuri Oh","doi":"10.1021/acsphotonics.4c01995","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01995","url":null,"abstract":"Enhancing the performance of quantum dot light-emitting diodes (QD-LEDs) often involves using wide band gap shells to confine charge carriers, which has proven to be an effective strategy. However, injecting charges within the core is critical to device efficiency, and controlling heterostructures can provide deeper insights into charge dynamics. In this study, we independently manipulated electron and hole injection while maintaining consistent emission properties by using the same core but growing distinct shells. Two types of quasi-type II QDs were synthesized: acceptor QDs (A-QD) for hole injection and donor QDs (D-QD) for electron injection. By varying the deposition order of these QDs, we observed significant differences in charge injection efficiencies that strongly influenced device performance. Notably, the combination of A-QDs near the hole transport layer and D-QDs near the electron transport layer (AD-QD-LED) resulted in a maximum brightness of 81,400 cd/m2 and an efficiency of 9.1 cd/A, representing nearly 30 times higher luminance and 15 times greater efficiency compared to the DA-QD-LED. Our findings provide the first clear demonstration of how the combination of quasi-type II QDs with tailored core/shell structures can control charge injection dynamics in QD-LEDs, offering a new pathway for optimizing charge balance and enhancing device efficiency.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"94 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142986047","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