ACS Photonics最新文献_第9页

Tunable Photoinduced Liquid Crystal Retarders for All-Optical Diffractive Deep Neural Networks 用于全光学衍射深度神经网络的可调光诱导液晶缓速器

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-05 DOI: 10.1021/acsphotonics.4c01284

Quanzhou Long, Lisheng Yao, Junjie Shao, Fion Sze Yan Yeung, Lingxiao Zhou, Wanlong Zhang, Xiaocong Yuan

{"title":"Tunable Photoinduced Liquid Crystal Retarders for All-Optical Diffractive Deep Neural Networks","authors":"Quanzhou Long, Lisheng Yao, Junjie Shao, Fion Sze Yan Yeung, Lingxiao Zhou, Wanlong Zhang, Xiaocong Yuan","doi":"10.1021/acsphotonics.4c01284","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01284","url":null,"abstract":"An all-optical diffractive deep neural network (D2NN) consists of deep-learning-based design of passive diffractive layers and uses light to perform massive computations at the speed of light with zero extra power consumption, exhibiting advantages of large bandwidth, high interconnection, and parallel processing capability. In this paper, we introduce a novel approach utilizing a 5-layer all-optical D2NN constructed with photoinduced liquid crystal (LC) alignment technology to create LC-based tunable phase retarders as artificial neural layers. The D2NN architecture leverages microscale multidomain LC retarders as optical neurons to manipulate the geometric phase of incident light. We systematically simulate pixel-level displacements to enhance alignment tolerance during experiments, achieving robust resilience against misalignment interference with a 2-pixel tolerance in the x and y directions. By actively tuning the LC retarders with external voltage, we optimize the alignment strategy for all network layers, incorporating specially designed concave or convex lenses at each LC retarder for precise alignment in the x, y, and z directions. Through training with a handwritten dataset from MNIST, the D2NN demonstrates a simulated accuracy of 94.17% with a 2 pixel misalignment tolerance. Experimental validation achieves a classification accuracy of 89% with 500 random digits from the test dataset. This research showcases the potential for network miniaturization, integration, and compatibility with visible light, underscoring the practical applicability of an all-optical D2NN for diverse real-world applications.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"55 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142588409","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

Tunable Photoinduced Liquid Crystal Retarders for All-Optical Diffractive Deep Neural Networks 用于全光学衍射深度神经网络的可调光诱导液晶缓速器

IF 6.5 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-05 DOI: 10.1021/acsphotonics.4c0128410.1021/acsphotonics.4c01284

Quanzhou Long, Lisheng Yao, Junjie Shao, Fion Sze Yan Yeung, Lingxiao Zhou, Wanlong Zhang* and Xiaocong Yuan*,

{"title":"Tunable Photoinduced Liquid Crystal Retarders for All-Optical Diffractive Deep Neural Networks","authors":"Quanzhou Long, Lisheng Yao, Junjie Shao, Fion Sze Yan Yeung, Lingxiao Zhou, Wanlong Zhang* and Xiaocong Yuan*, ","doi":"10.1021/acsphotonics.4c0128410.1021/acsphotonics.4c01284","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01284https://doi.org/10.1021/acsphotonics.4c01284","url":null,"abstract":"An all-optical diffractive deep neural network (D2NN) consists of deep-learning-based design of passive diffractive layers and uses light to perform massive computations at the speed of light with zero extra power consumption, exhibiting advantages of large bandwidth, high interconnection, and parallel processing capability. In this paper, we introduce a novel approach utilizing a 5-layer all-optical D2NN constructed with photoinduced liquid crystal (LC) alignment technology to create LC-based tunable phase retarders as artificial neural layers. The D2NN architecture leverages microscale multidomain LC retarders as optical neurons to manipulate the geometric phase of incident light. We systematically simulate pixel-level displacements to enhance alignment tolerance during experiments, achieving robust resilience against misalignment interference with a 2-pixel tolerance in the x and y directions. By actively tuning the LC retarders with external voltage, we optimize the alignment strategy for all network layers, incorporating specially designed concave or convex lenses at each LC retarder for precise alignment in the x, y, and z directions. Through training with a handwritten dataset from MNIST, the D2NN demonstrates a simulated accuracy of 94.17% with a 2 pixel misalignment tolerance. Experimental validation achieves a classification accuracy of 89% with 500 random digits from the test dataset. This research showcases the potential for network miniaturization, integration, and compatibility with visible light, underscoring the practical applicability of an all-optical D2NN for diverse real-world applications.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"11 11","pages":"4778–4785 4778–4785"},"PeriodicalIF":6.5,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671656","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

Dual-Wavelength Exciton-Polariton Condensation via Relaxation of Multiple Vibrational Quanta in Organic Microcavities 通过有机微腔中多个振动量子的弛豫实现双波长激子-极化子凝聚

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-04 DOI: 10.1021/acsphotonics.4c01195

Liuqing Yang, Xuekai Ma, Teng Long, Han Huang, Jiahuan Ren, Chunling Gu, Cunbin An, Bo Liao, Hongbing Fu, Qing Liao

{"title":"Dual-Wavelength Exciton-Polariton Condensation via Relaxation of Multiple Vibrational Quanta in Organic Microcavities","authors":"Liuqing Yang, Xuekai Ma, Teng Long, Han Huang, Jiahuan Ren, Chunling Gu, Cunbin An, Bo Liao, Hongbing Fu, Qing Liao","doi":"10.1021/acsphotonics.4c01195","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01195","url":null,"abstract":"The relaxation of organic polaritons is a key aspect for understanding nonequilibrium bosonic condensation in organic microcavities. In this work, dual-branch vibrational quanta-assisted polariton condensation is experimentally observed in organic single-crystal-filled microcavities. By precisely modulating the thickness of the planar optical resonator, we can tune the ground states of two lower polariton branches to perfectly match the energies of two vibrational modes and consequently trigger polariton condensation in both branches. These condensates have nearly identical thresholds. Dynamical analysis indicates that efficient energy relaxation of the photogenerated excitons to the two vibrational modes through the nonradiation of two separately vibrational quanta enables polaritons to populate the ground states of these two lower polariton branches. Our work is evidence of the importance of the vibrational quanta relaxation mechanism for polariton condensation and provides a pathway for multicolor polariton condensation and future laser displays.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"196 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580234","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

Dual-Wavelength Exciton-Polariton Condensation via Relaxation of Multiple Vibrational Quanta in Organic Microcavities 通过有机微腔中多个振动量子的弛豫实现双波长激子-极化子凝聚

IF 6.5 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-04 DOI: 10.1021/acsphotonics.4c0119510.1021/acsphotonics.4c01195

Liuqing Yang, Xuekai Ma, Teng Long, Han Huang, Jiahuan Ren, Chunling Gu, Cunbin An, Bo Liao, Hongbing Fu* and Qing Liao*,

{"title":"Dual-Wavelength Exciton-Polariton Condensation via Relaxation of Multiple Vibrational Quanta in Organic Microcavities","authors":"Liuqing Yang, Xuekai Ma, Teng Long, Han Huang, Jiahuan Ren, Chunling Gu, Cunbin An, Bo Liao, Hongbing Fu* and Qing Liao*, ","doi":"10.1021/acsphotonics.4c0119510.1021/acsphotonics.4c01195","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01195https://doi.org/10.1021/acsphotonics.4c01195","url":null,"abstract":"The relaxation of organic polaritons is a key aspect for understanding nonequilibrium bosonic condensation in organic microcavities. In this work, dual-branch vibrational quanta-assisted polariton condensation is experimentally observed in organic single-crystal-filled microcavities. By precisely modulating the thickness of the planar optical resonator, we can tune the ground states of two lower polariton branches to perfectly match the energies of two vibrational modes and consequently trigger polariton condensation in both branches. These condensates have nearly identical thresholds. Dynamical analysis indicates that efficient energy relaxation of the photogenerated excitons to the two vibrational modes through the nonradiation of two separately vibrational quanta enables polaritons to populate the ground states of these two lower polariton branches. Our work is evidence of the importance of the vibrational quanta relaxation mechanism for polariton condensation and provides a pathway for multicolor polariton condensation and future laser displays.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"11 11","pages":"4700–4706 4700–4706"},"PeriodicalIF":6.5,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671175","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 Spectral-Hole-Burning in Non-Hermitian Scatterings: Differentiating Far-Field Interference and Near-Field Coupling 探测非ermitian散射中的谱孔燃烧：区分远场干扰和近场耦合

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-03 DOI: 10.1021/acsphotonics.4c01085

Wen-jie Zhou, Jingfeng Liu, Renming Liu, Juan-feng Zhu, Dmitrii Gromyko, Cheng-wei Qiu, Lin Wu

{"title":"Probing Spectral-Hole-Burning in Non-Hermitian Scatterings: Differentiating Far-Field Interference and Near-Field Coupling","authors":"Wen-jie Zhou, Jingfeng Liu, Renming Liu, Juan-feng Zhu, Dmitrii Gromyko, Cheng-wei Qiu, Lin Wu","doi":"10.1021/acsphotonics.4c01085","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01085","url":null,"abstract":"Scattering spectra from radiative non-Hermitian systems often exhibit intricate line shapes, where peaks typically garner the most attention for mode identification. However, in multimode systems, the valleys between these peaks may contain valuable information. This “coupling” feature arises from the nonorthogonality of modes in both far and near fields, giving rise to diverse and complex spectra-hole-burning (SHB) patterns. Traditionally, the interpretation of these SHBs has focused on Rabi splitting or Fano resonances, often concentrating solely on either far-field interference or near-field coupling. However, it is essential to recognize that both phenomena coexist in non-Hermitian scatterings. In this study, we develop a quantitative quantum model to probe scattering SHB by simultaneously extracting near-field coupling rates between system quasinormal modes, nonradiative decay rates into a heat reservoir, and radiative decay rates into a vacuum reservoir for far-field interference. We apply our model to illustrate the concept of geometric engineering in tuning the ratio of far-field interference and near-field coupling, exemplified by a silver dimer transitioning from cube-dimer to sphere-dimer or cube-dimer to nanocube-on-mirror configurations. Through this, we establish a universal design guideline for non-Hermitian scattering by creating a two-mode SHB library based on arbitrarily tunable far-field interference and near-field coupling. The developed model serves as a generalized diagnostic tool for probing the SHB mechanisms in all types of non-Hermitian scattering problems, promising to advance our understanding of intricate phenomena and facilitate the design of tailored optical devices with enhanced performance and functionality.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"240 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566147","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 Spectral-Hole-Burning in Non-Hermitian Scatterings: Differentiating Far-Field Interference and Near-Field Coupling 探测非ermitian散射中的谱孔燃烧：区分远场干扰和近场耦合

IF 6.5 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-03 DOI: 10.1021/acsphotonics.4c0108510.1021/acsphotonics.4c01085

Wen-jie Zhou, Jingfeng Liu, Renming Liu, Juan-feng Zhu, Dmitrii Gromyko, Cheng-wei Qiu* and Lin Wu*,

{"title":"Probing Spectral-Hole-Burning in Non-Hermitian Scatterings: Differentiating Far-Field Interference and Near-Field Coupling","authors":"Wen-jie Zhou, Jingfeng Liu, Renming Liu, Juan-feng Zhu, Dmitrii Gromyko, Cheng-wei Qiu* and Lin Wu*, ","doi":"10.1021/acsphotonics.4c0108510.1021/acsphotonics.4c01085","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01085https://doi.org/10.1021/acsphotonics.4c01085","url":null,"abstract":"Scattering spectra from radiative non-Hermitian systems often exhibit intricate line shapes, where peaks typically garner the most attention for mode identification. However, in multimode systems, the valleys between these peaks may contain valuable information. This “coupling” feature arises from the nonorthogonality of modes in both far and near fields, giving rise to diverse and complex spectra-hole-burning (SHB) patterns. Traditionally, the interpretation of these SHBs has focused on Rabi splitting or Fano resonances, often concentrating solely on either far-field interference or near-field coupling. However, it is essential to recognize that both phenomena coexist in non-Hermitian scatterings. In this study, we develop a quantitative quantum model to probe scattering SHB by simultaneously extracting near-field coupling rates between system quasinormal modes, nonradiative decay rates into a heat reservoir, and radiative decay rates into a vacuum reservoir for far-field interference. We apply our model to illustrate the concept of geometric engineering in tuning the ratio of far-field interference and near-field coupling, exemplified by a silver dimer transitioning from cube-dimer to sphere-dimer or cube-dimer to nanocube-on-mirror configurations. Through this, we establish a universal design guideline for non-Hermitian scattering by creating a two-mode SHB library based on arbitrarily tunable far-field interference and near-field coupling. The developed model serves as a generalized diagnostic tool for probing the SHB mechanisms in all types of non-Hermitian scattering problems, promising to advance our understanding of intricate phenomena and facilitate the design of tailored optical devices with enhanced performance and functionality.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"11 11","pages":"4671–4681 4671–4681"},"PeriodicalIF":6.5,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671255","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

Achieving Balanced Energy Harvesting and Light Detection via Compositional Modulation with a High-LUMO-Level Nonfused-Ring Electron Acceptor 通过高 LUMO 级非熔环电子受体的成分调制实现平衡的能量收集和光探测功能

IF 6.5 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-02 DOI: 10.1021/acsphotonics.4c0123210.1021/acsphotonics.4c01232

Min Soo Kim, Dou Luo, Byung Gi Kim, Woongsik Jang, Chengwei Shan, Aung Ko Ko Kyaw* and Dong Hwan Wang*,

{"title":"Achieving Balanced Energy Harvesting and Light Detection via Compositional Modulation with a High-LUMO-Level Nonfused-Ring Electron Acceptor","authors":"Min Soo Kim, Dou Luo, Byung Gi Kim, Woongsik Jang, Chengwei Shan, Aung Ko Ko Kyaw* and Dong Hwan Wang*, ","doi":"10.1021/acsphotonics.4c0123210.1021/acsphotonics.4c01232","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01232https://doi.org/10.1021/acsphotonics.4c01232","url":null,"abstract":"Organic photovoltaics (OPVs) and organic photodetectors (OPDs) offer promising energy harvesting and photodetection capabilities. In this study, we newly designed and synthesized a novel nonfused-ring electron acceptor (NFREA) named “LK-2” with a high lowest unoccupied molecular orbital (LUMO) level of −3.61 eV. We aimed to enhance the energy harvesting performance in OPVs by improving the open-circuit voltage (VOC) and light detecting ability by mitigating the dark currents in the OPDs. LK-2 was incorporated into the host photoactive material comprising PM6 donors and BTP-4F-12 acceptors using a ternary strategy that facilitated compositional modulation among the materials. The inclusion of LK-2 resulted in an improved VOC of 0.84 V under 1-sun illumination and a significantly suppressed dark current density of 2.77 × 10–10 A cm–2 under a self-powered condition. The effective intermixing of LK-2 with PM6 and BTP-4F-12 facilitated a favorable thin-film morphology, contributing to enhanced device performance. Furthermore, LK-2 suppressed bimolecular recombination under low light intensities and reduced noise currents, resulting in a broad linear dynamic range even under reverse bias conditions. This study highlighted the potential of the newly developed NFREA for simultaneously enhancing the performance of both OPV and OPD devices, offering a balanced approach to realize energy harvesting and light detection.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"11 11","pages":"4739–4750 4739–4750"},"PeriodicalIF":6.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671326","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

Achieving Balanced Energy Harvesting and Light Detection via Compositional Modulation with a High-LUMO-Level Nonfused-Ring Electron Acceptor 通过高 LUMO 级非熔环电子受体的成分调制实现平衡的能量收集和光探测功能

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-02 DOI: 10.1021/acsphotonics.4c01232

Min Soo Kim, Dou Luo, Byung Gi Kim, Woongsik Jang, Chengwei Shan, Aung Ko Ko Kyaw, Dong Hwan Wang

{"title":"Achieving Balanced Energy Harvesting and Light Detection via Compositional Modulation with a High-LUMO-Level Nonfused-Ring Electron Acceptor","authors":"Min Soo Kim, Dou Luo, Byung Gi Kim, Woongsik Jang, Chengwei Shan, Aung Ko Ko Kyaw, Dong Hwan Wang","doi":"10.1021/acsphotonics.4c01232","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01232","url":null,"abstract":"Organic photovoltaics (OPVs) and organic photodetectors (OPDs) offer promising energy harvesting and photodetection capabilities. In this study, we newly designed and synthesized a novel nonfused-ring electron acceptor (NFREA) named “LK-2” with a high lowest unoccupied molecular orbital (LUMO) level of −3.61 eV. We aimed to enhance the energy harvesting performance in OPVs by improving the open-circuit voltage (VOC) and light detecting ability by mitigating the dark currents in the OPDs. LK-2 was incorporated into the host photoactive material comprising PM6 donors and BTP-4F-12 acceptors using a ternary strategy that facilitated compositional modulation among the materials. The inclusion of LK-2 resulted in an improved VOC of 0.84 V under 1-sun illumination and a significantly suppressed dark current density of 2.77 × 10–10 A cm–2 under a self-powered condition. The effective intermixing of LK-2 with PM6 and BTP-4F-12 facilitated a favorable thin-film morphology, contributing to enhanced device performance. Furthermore, LK-2 suppressed bimolecular recombination under low light intensities and reduced noise currents, resulting in a broad linear dynamic range even under reverse bias conditions. This study highlighted the potential of the newly developed NFREA for simultaneously enhancing the performance of both OPV and OPD devices, offering a balanced approach to realize energy harvesting and light detection.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"143 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563288","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 in a Monolayer Tungsten Diselenide Integrated Silicon Nitride Nanocavity 单层二硒化钨集成氮化硅纳米腔中的增强型二次谐波发生

IF 7 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-02 DOI: 10.1021/acsphotonics.4c01029

Hannah Rarick, Abhinav Kala, Sinabu Pumulo, Arnab Manna, David Sharp, Christopher Munley, Xiaodong Xu, Arka Majumdar

引用次数: 0

Enhanced Second-Harmonic Generation in a Monolayer Tungsten Diselenide Integrated Silicon Nitride Nanocavity 单层二硒化钨集成氮化硅纳米腔中的增强型二次谐波发生

IF 6.5 1区物理与天体物理

ACS Photonics Pub Date : 2024-11-02 DOI: 10.1021/acsphotonics.4c0102910.1021/acsphotonics.4c01029

Hannah Rarick, Abhinav Kala, Sinabu Pumulo, Arnab Manna, David Sharp, Christopher Munley, Xiaodong Xu and Arka Majumdar*,

{"title":"Enhanced Second-Harmonic Generation in a Monolayer Tungsten Diselenide Integrated Silicon Nitride Nanocavity","authors":"Hannah Rarick, Abhinav Kala, Sinabu Pumulo, Arnab Manna, David Sharp, Christopher Munley, Xiaodong Xu and Arka Majumdar*, ","doi":"10.1021/acsphotonics.4c0102910.1021/acsphotonics.4c01029","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01029https://doi.org/10.1021/acsphotonics.4c01029","url":null,"abstract":"Observations of nonlinear optical phenomena are greatly hindered by the large optical power requirements. Nanophotonic cavities can drastically reduce the required optical powers thanks to the strong spatial and temporal confinement of light. Furthermore, two-dimensional atomically thin transition metal dichalcogenides boast high nonlinear optical coefficients and are promising candidates for hybrid nanophotonics due to their ease of integration and compatibility with many substrates without requiring explicit lattice matching. Here, we demonstrate cavity enhanced second harmonic generation in a monolayer tungsten diselenide integrated silicon nitride nanocavity. With a fundamental frequency close to the excitonic resonance and a large second order susceptibility at wavelengths near 800 nm, we observed a cavity enhancement of more than 3 orders of magnitude of second harmonic generation compared to bare monolayer.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"11 11","pages":"4635–4641 4635–4641"},"PeriodicalIF":6.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671229","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