ACS Photonics最新文献_第5页

Exception to Causality of the Effective Refractive Index Function in Heterogeneous Media 非均匀介质中有效折射率函数因果关系的例外

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-13 DOI: 10.1021/acsphotonics.5c00804

Miguel A. Báez-Chorro, Borja Vidal

{"title":"Exception to Causality of the Effective Refractive Index Function in Heterogeneous Media","authors":"Miguel A. Báez-Chorro, Borja Vidal","doi":"10.1021/acsphotonics.5c00804","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00804","url":null,"abstract":"Optical constants are generally assumed to be causal functions. Mathematically, causality manifest itself in the Kramers–Kronig (KK) relations that relate the real and imaginary part of physical parameters in stable systems. These relations are also widely used to retrieve optical constants. Here, we present a stable physical heterogeneous system that is macroscopically described by a noncausal effective refractive index. We find that elastic scattering in heterogeneous media where particles have a lower refractive index than the surrounding matrix, results in optical constants that are not connected through KK relations. A modification of KK relations for anticausal media is presented and simulations with established scattering theories, numerical full-field electromagnetic analysis and experimental evidence support the agreement of these relations. Therefore, this physical system, although having a causal impulse response, has noncausal optical constants. These results offer a new insight into causality and restrict its range of applications, showing that some stable physical media can be described by noncausal functions. It also opens new paths to shape the electromagnetic response of artificial materials.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"21 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143940172","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

High-Quality Microfluidic Lasers from Water-Soluble Semiconductor Quantum Dots with Auspicious Optical Gain 具有吉祥光学增益的水溶性半导体量子点制备的高品质微流控激光器

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-13 DOI: 10.1021/acsphotonics.5c00349

Wenbing Cai, Yuting Wu, Zhigao Huang, Hai Zhu, Ke Wang, Yue Wang, Yinjuan Ren

{"title":"High-Quality Microfluidic Lasers from Water-Soluble Semiconductor Quantum Dots with Auspicious Optical Gain","authors":"Wenbing Cai, Yuting Wu, Zhigao Huang, Hai Zhu, Ke Wang, Yue Wang, Yinjuan Ren","doi":"10.1021/acsphotonics.5c00349","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00349","url":null,"abstract":"Water-soluble quantum-dot (w-QD) lasing is crucial for the emerging fields of optofluidics, biophotonics, and diagnostics. However, the existing w-QDs are not competent due to their inferior optical gain and poor photostability. Herein, a hydrophilic ligand screening criterion is established to find suitable candidates for developing w-QD lasers. The comprehensive spectroscopic characterizations reveal that the thioglycolic acid-capped w-QDs exhibit superior gain performance that is on par with those of state-of-the-art nonpolar QDs, including the long gain lifetime, large gain cross-section, and low threshold of amplified spontaneous emission. The mechanistic study based on transient absorption and first-principles calculation discloses that the auspicious gain is enabled by the large surface binding energy, small absolute redox potential, and exceptional dispersibility of the w-QDs. On this basis, a novel high-quality microfluidic laser is constructed from the w-QDs, exhibiting a low threshold, high Q-factor, and long-term robustness. The findings represent a significant step toward w-QD lasers and may unlock new possibilities for advanced optofluidics and medical imaging.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"29 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143940173","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

Quantifying the Accuracy and Precision of the Transition Dipole Moment Alignment from Realistic Angular Emission Data 从实际角发射数据量化跃迁偶极矩对准的精度和精度

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-12 DOI: 10.1021/acsphotonics.5c00684

Brendan Russ, Tung-Tung Lin, Hannah Elenteny, Carissa N. Eisler

{"title":"Quantifying the Accuracy and Precision of the Transition Dipole Moment Alignment from Realistic Angular Emission Data","authors":"Brendan Russ, Tung-Tung Lin, Hannah Elenteny, Carissa N. Eisler","doi":"10.1021/acsphotonics.5c00684","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00684","url":null,"abstract":"Optoelectronic device efficiency depends on the effective orientation of its photoluminescent transition dipole moment(s). This orientation is typically quantified indirectly by fitting the angular emission pattern of a material. However, the accuracy and uncertainty of this procedure are unknown, and thus, the predicted efficiency of a device has the potential to be extremely inaccurate. Here, we quantify the inherent accuracy and precision of finding the orientation of transition dipole moment(s). We created artificial data sets of varying transition dipole moment alignments, refractive indices, and thicknesses and used statistical models to determine the fit accuracy and associated confidence intervals. The inherent confidence intervals are inconsistent across transition dipole moment alignments and samples: uncertainty increases for more horizontally aligned dipoles and for higher refractive indices, meaning that quantum-confined semiconductor films will inherently have a less precise fit. We then showed that accurately fitting the transition dipole moment alignment requires adequate knowledge of the film parameters or computationally expensive fitting methods. Finally, we incorporated realistic nonidealities into our generated data sets that led to extremely inaccurate predictions of the true transition dipole moment alignment, with some cases showing 10–30° difference from the true angle. To address this, we developed a new weighting mask that reduced these inaccuracies to be within a few degrees for most cases. Through this work, we provided a framework to more accurately quantify the transition dipole moment alignment and the uncertainty of the associated fit, enabling better predictions of material properties and future device performance.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"8 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143940233","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

Enhanced Second Harmonic Generation from a Waveguide-Integrated Plasmonic Fabry–Pérot Nanoresonator 波导集成等离子体法布里-帕姆罗纳米谐振器增强二次谐波的产生

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-10 DOI: 10.1021/acsphotonics.4c02463

Xiaobo He, Li Li, Kangcheng Jing, Tianzhu Zhang, Wenjun Zhang, Junjun Shi, Hongxing Xu

{"title":"Enhanced Second Harmonic Generation from a Waveguide-Integrated Plasmonic Fabry–Pérot Nanoresonator","authors":"Xiaobo He, Li Li, Kangcheng Jing, Tianzhu Zhang, Wenjun Zhang, Junjun Shi, Hongxing Xu","doi":"10.1021/acsphotonics.4c02463","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02463","url":null,"abstract":"A plasmonic nanoantenna can significantly improve the nonlinear effect owing to strong local electromagnetic fields and a large scattering cross-section. However, direct excitation using high-power incident laser light might destroy the nanoantenna, which hinders further improvement of the nonlinear effect. Here, we use a waveguide-integrated hybrid plasmonic Fabry–Pérot (FP) nanoresonator to achieve enhanced second-harmonic generation (SHG). The fabricated nanoresonator comprises a CdSe nanobelt sandwiched between a Au nanoparticle and a Au nanoplate. The CdSe nanobelt acts as a waveguide that guides light and also serves as a spacer with a high nonlinear susceptibility in the FP nanoresonator to enhance SHG signals. Resonance matching is achieved by tuning the CdSe size and the excitation wavelength. Consequently, a 10-fold increase in the magnitude of SHG is achieved compared to that in the scenario without a nanoparticle. A signal-to-noise ratio of 10.5 is achieved in the remote-excitation configuration, which is 1 order of magnitude higher than that in free-space SHG. This approach paves the way for the fabrication of nonlinear integrated devices and has potential applications in surface-enhanced Raman scattering, biochemical detection, and sensing.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"39 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931207","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

Enhanced Second Harmonic Generation from a Waveguide-Integrated Plasmonic Fabry–Pérot Nanoresonator 波导集成等离子体法布里-帕姆罗纳米谐振器增强二次谐波的产生

IF 6.5 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-10 DOI: 10.1021/acsphotonics.4c0246310.1021/acsphotonics.4c02463

Xiaobo He*, Li Li, Kangcheng Jing, Tianzhu Zhang, Wenjun Zhang, Junjun Shi* and Hongxing Xu,

{"title":"Enhanced Second Harmonic Generation from a Waveguide-Integrated Plasmonic Fabry–Pérot Nanoresonator","authors":"Xiaobo He*, Li Li, Kangcheng Jing, Tianzhu Zhang, Wenjun Zhang, Junjun Shi* and Hongxing Xu, ","doi":"10.1021/acsphotonics.4c0246310.1021/acsphotonics.4c02463","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c02463https://doi.org/10.1021/acsphotonics.4c02463","url":null,"abstract":"A plasmonic nanoantenna can significantly improve the nonlinear effect owing to strong local electromagnetic fields and a large scattering cross-section. However, direct excitation using high-power incident laser light might destroy the nanoantenna, which hinders further improvement of the nonlinear effect. Here, we use a waveguide-integrated hybrid plasmonic Fabry–Pérot (FP) nanoresonator to achieve enhanced second-harmonic generation (SHG). The fabricated nanoresonator comprises a CdSe nanobelt sandwiched between a Au nanoparticle and a Au nanoplate. The CdSe nanobelt acts as a waveguide that guides light and also serves as a spacer with a high nonlinear susceptibility in the FP nanoresonator to enhance SHG signals. Resonance matching is achieved by tuning the CdSe size and the excitation wavelength. Consequently, a 10-fold increase in the magnitude of SHG is achieved compared to that in the scenario without a nanoparticle. A signal-to-noise ratio of 10.5 is achieved in the remote-excitation configuration, which is 1 order of magnitude higher than that in free-space SHG. This approach paves the way for the fabrication of nonlinear integrated devices and has potential applications in surface-enhanced Raman scattering, biochemical detection, and sensing.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"12 5","pages":"2509–2514 2509–2514"},"PeriodicalIF":6.5,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098161","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

Phase-Controlled Metasurface Design for Full-Stokes Polarization Detector Driven by SPPN SPPN驱动Full-Stokes偏振探测器的相位控制超表面设计

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-09 DOI: 10.1021/acsphotonics.5c00767

Peiqi Yu, Shikun Duan, Qixiang Jia, Yuanyu Zhu, Xueyu Guan, Ruonan Ji, Hailing Wang, Zhongshi Huang, Lin Li, Xiaolong Zhu, Xuechu Shen, Shaowei Wang

{"title":"Phase-Controlled Metasurface Design for Full-Stokes Polarization Detector Driven by SPPN","authors":"Peiqi Yu, Shikun Duan, Qixiang Jia, Yuanyu Zhu, Xueyu Guan, Ruonan Ji, Hailing Wang, Zhongshi Huang, Lin Li, Xiaolong Zhu, Xuechu Shen, Shaowei Wang","doi":"10.1021/acsphotonics.5c00767","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00767","url":null,"abstract":"Full-Stokes real-time detection, an important polarization detection method, can capture the polarization, spectrum, and intensity information on vector light field simultaneously and improve the ability to accurately identify complex targets significantly. However, in existing systems, the components required for obtaining full-Stokes polarization and circular polarization are often difficult to integrate, relying on multiple parameter adjustments, resulting in time-consuming and heavily dependent on computational resources. In this article, we combine a phase-controlled metasurface with a two-dimensional material detector to design a multidimensional detector with wavelength and full-Stokes polarization selection characteristics. We proposed a spectral phase prediction network based on a convolutional neural network-gated recurrent unit, which effectively addressed the time-consuming and labor-intensive problem of searching for appropriate phase-corresponding structures in phase-regulated metasurface design. This innovation can reduce the design time by a factor of 106. The experimental results show that the circular dichroism of the design achieves 0.8 at the design wavelength, with transmission over 87%. According to the characteristics, the spectra can be improved by combining the designed device with the Fabry–Pérot cavity. Finally, we combined van der Waals materials with the metasurface to achieve a highly integrated full-Stokes polarization spectroscopic photodetector and circular polarization imaging. This study provides a reliable technological approach for the development of next-generation spatial sensing technology and holds promise for future high-dimensional sensing devices to achieve multidimensional detection and recognition of targets.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"107 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143926919","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

Probing Spatiotemporal Reshaping of Three-Color Laser Waveforms in a Gas Medium via High-Order Harmonic Generation Spectroscopy 利用高次谐波产生光谱探测气体介质中三色激光波形的时空重塑

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-09 DOI: 10.1021/acsphotonics.5c00556

Chi Zhang, Xiangyu Tang, Baochang Li, Zhiming Yin, Jiahao You, Bincheng Wang, Xiaoyong Li, Chii-Dong Lin, Cheng Jin

{"title":"Probing Spatiotemporal Reshaping of Three-Color Laser Waveforms in a Gas Medium via High-Order Harmonic Generation Spectroscopy","authors":"Chi Zhang, Xiangyu Tang, Baochang Li, Zhiming Yin, Jiahao You, Bincheng Wang, Xiaoyong Li, Chii-Dong Lin, Cheng Jin","doi":"10.1021/acsphotonics.5c00556","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00556","url":null,"abstract":"The spatiotemporal properties of a multicolor laser waveform during its propagation in a gas medium are of great interest, but they cannot be obtained using traditional characterization methods for ultrashort laser pulses. In this work, we demonstrate that high-order harmonic generation (HHG) spectroscopy provides an opportunity to obtain this information. To this end, we first show that the experimentally measured HHG spectra of Ne atoms, generated using a long-duration three-color synthesizer in a long gas cell, can be reproduced by our simulation, and continuum harmonics appear in both experiment and simulation. By synthesizing an isolated attosecond pulse from the continuum harmonics, the spatiotemporal reshaping of the driving laser waveform can be explored. Next, by varying the time delay between two of the three colors, we extract the slope of the high-energy photons. In theory, our results demonstrate that the spatiotemporal reshaping of the three-color laser waveform can be identified through the relationship between the slope and the cutoff energy, with the single-atom response serving as a reference. This approach is anticipated to significantly expand the applications of multicolor lasers across diverse research fields.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"39 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143926917","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

Probing Spatiotemporal Reshaping of Three-Color Laser Waveforms in a Gas Medium via High-Order Harmonic Generation Spectroscopy 利用高次谐波产生光谱探测气体介质中三色激光波形的时空重塑

IF 6.5 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-09 DOI: 10.1021/acsphotonics.5c0055610.1021/acsphotonics.5c00556

Chi Zhang, Xiangyu Tang, Baochang Li, Zhiming Yin, Jiahao You, Bincheng Wang, Xiaoyong Li, Chii-Dong Lin and Cheng Jin*,

{"title":"Probing Spatiotemporal Reshaping of Three-Color Laser Waveforms in a Gas Medium via High-Order Harmonic Generation Spectroscopy","authors":"Chi Zhang, Xiangyu Tang, Baochang Li, Zhiming Yin, Jiahao You, Bincheng Wang, Xiaoyong Li, Chii-Dong Lin and Cheng Jin*, ","doi":"10.1021/acsphotonics.5c0055610.1021/acsphotonics.5c00556","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00556https://doi.org/10.1021/acsphotonics.5c00556","url":null,"abstract":"The spatiotemporal properties of a multicolor laser waveform during its propagation in a gas medium are of great interest, but they cannot be obtained using traditional characterization methods for ultrashort laser pulses. In this work, we demonstrate that high-order harmonic generation (HHG) spectroscopy provides an opportunity to obtain this information. To this end, we first show that the experimentally measured HHG spectra of Ne atoms, generated using a long-duration three-color synthesizer in a long gas cell, can be reproduced by our simulation, and continuum harmonics appear in both experiment and simulation. By synthesizing an isolated attosecond pulse from the continuum harmonics, the spatiotemporal reshaping of the driving laser waveform can be explored. Next, by varying the time delay between two of the three colors, we extract the slope of the high-energy photons. In theory, our results demonstrate that the spatiotemporal reshaping of the three-color laser waveform can be identified through the relationship between the slope and the cutoff energy, with the single-atom response serving as a reference. This approach is anticipated to significantly expand the applications of multicolor lasers across diverse research fields.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"12 5","pages":"2852–2860 2852–2860"},"PeriodicalIF":6.5,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098230","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

Phase-Controlled Metasurface Design for Full-Stokes Polarization Detector Driven by SPPN SPPN驱动Full-Stokes偏振探测器的相位控制超表面设计

IF 6.5 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-09 DOI: 10.1021/acsphotonics.5c0076710.1021/acsphotonics.5c00767

Peiqi Yu, Shikun Duan, Qixiang Jia, Yuanyu Zhu, Xueyu Guan, Ruonan Ji, Hailing Wang, Zhongshi Huang, Lin Li, Xiaolong Zhu, Xuechu Shen and Shaowei Wang*,

{"title":"Phase-Controlled Metasurface Design for Full-Stokes Polarization Detector Driven by SPPN","authors":"Peiqi Yu, Shikun Duan, Qixiang Jia, Yuanyu Zhu, Xueyu Guan, Ruonan Ji, Hailing Wang, Zhongshi Huang, Lin Li, Xiaolong Zhu, Xuechu Shen and Shaowei Wang*, ","doi":"10.1021/acsphotonics.5c0076710.1021/acsphotonics.5c00767","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00767https://doi.org/10.1021/acsphotonics.5c00767","url":null,"abstract":"Full-Stokes real-time detection, an important polarization detection method, can capture the polarization, spectrum, and intensity information on vector light field simultaneously and improve the ability to accurately identify complex targets significantly. However, in existing systems, the components required for obtaining full-Stokes polarization and circular polarization are often difficult to integrate, relying on multiple parameter adjustments, resulting in time-consuming and heavily dependent on computational resources. In this article, we combine a phase-controlled metasurface with a two-dimensional material detector to design a multidimensional detector with wavelength and full-Stokes polarization selection characteristics. We proposed a spectral phase prediction network based on a convolutional neural network-gated recurrent unit, which effectively addressed the time-consuming and labor-intensive problem of searching for appropriate phase-corresponding structures in phase-regulated metasurface design. This innovation can reduce the design time by a factor of 106. The experimental results show that the circular dichroism of the design achieves 0.8 at the design wavelength, with transmission over 87%. According to the characteristics, the spectra can be improved by combining the designed device with the Fabry–Pérot cavity. Finally, we combined van der Waals materials with the metasurface to achieve a highly integrated full-Stokes polarization spectroscopic photodetector and circular polarization imaging. This study provides a reliable technological approach for the development of next-generation spatial sensing technology and holds promise for future high-dimensional sensing devices to achieve multidimensional detection and recognition of targets.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"12 5","pages":"2878–2886 2878–2886"},"PeriodicalIF":6.5,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144097957","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

Doubly Resonant c-GaP Nanocavity for Second Harmonic Generation 二次谐波产生的双谐振c-GaP纳米腔

IF 6.5 1区物理与天体物理

ACS Photonics Pub Date : 2025-05-08 DOI: 10.1021/acsphotonics.5c0051410.1021/acsphotonics.5c00514

Boris Kalinic*, Stefano Vezzoli, Neil Patel, Cynthia Vidal, Benjamin Tilmann, Stefan A. Maier, Riccardo Sapienza and Giovanni Mattei,

{"title":"Doubly Resonant c-GaP Nanocavity for Second Harmonic Generation","authors":"Boris Kalinic*, Stefano Vezzoli, Neil Patel, Cynthia Vidal, Benjamin Tilmann, Stefan A. Maier, Riccardo Sapienza and Giovanni Mattei, ","doi":"10.1021/acsphotonics.5c0051410.1021/acsphotonics.5c00514","DOIUrl":"https://doi.org/10.1021/acsphotonics.5c00514https://doi.org/10.1021/acsphotonics.5c00514","url":null,"abstract":"We present a doubly resonant nanocavity for second harmonic generation (SHG) in the visible range, consisting of a 590 nm crystalline gallium phosphide (c-GaP) layer, a gold mirror, and a silica spacer to achieve optimal overlap of pump and harmonic resonances. Experimental results show a conversion efficiency spanning 4 orders of magnitude, with a maximum η̃max = 0.014% at λSHG = 600 nm, comparable to best-performing semiconductor metasurfaces, and surpassing a bulk 400 μm GaP crystal by over an order of magnitude. Using nonlinear scattering theory, we explain the spectral response and demonstrate wavelength tunability via angle of incidence or spacer thickness adjustments. We extend this result to a closed-cavity design with an ultrathin gold top layer which we predict can achieve efficiencies up to η̃max ∼ 0.4% when the thickness of the c-GaP layer approaches the coherence length. This design can be scaled up to planar nanocavities with higher Q-factor and used to enhance the performance of metasurfaces, advancing nonlinear conversion efficiency toward practical applications.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"12 5","pages":"2843–2851 2843–2851"},"PeriodicalIF":6.5,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsphotonics.5c00514","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144097908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0