Nanophotonics最新文献_第9页

Multimodal Purcell enhancement and optical coherence of Eu3+ ions in a single nanoparticle coupled to a microcavity

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-12 DOI: 10.1515/nanoph-2024-0721

Timon Eichhorn, Nicholas Jobbitt, Sören Bieling, Shuping Liu, Tobias Krom, Diana Serrano, Robert Huber, Ulrich Lemmer, Hugues de Riedmatten, Philippe Goldner, David Hunger

{"title":"Multimodal Purcell enhancement and optical coherence of Eu3+ ions in a single nanoparticle coupled to a microcavity","authors":"Timon Eichhorn, Nicholas Jobbitt, Sören Bieling, Shuping Liu, Tobias Krom, Diana Serrano, Robert Huber, Ulrich Lemmer, Hugues de Riedmatten, Philippe Goldner, David Hunger","doi":"10.1515/nanoph-2024-0721","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0721","url":null,"abstract":"Europium-doped nanocrystals constitute a promising material for a scalable future quantum computing platform. Long-lived nuclear spin states could serve as qubits addressed via coherent optical transitions. In order to realize an efficient spin-photon interface, we couple the emission from a single nanoparticle to a fiber-based microcavity under cryogenic conditions. The spatial and spectral tunability of the cavity permits us to place individual nanoparticles in the cavity, to measure the inhomogeneous linewidth of the ions, and to show a multi-modal Purcell-enhancement of two transition in Eu3+. A halving of the free-space lifetime to 1.0 ms is observed, corresponding to a 140-fold enhancement of the respective transition. Furthermore, we observe a narrow optical linewidth of 3.3 MHz for a few-ion ensemble in the center of the inhomogeneous line. The results represent an important step towards the efficient readout of single Eu3+ ions, a key requirement for the realization of single-ion-level quantum processing nodes in the solid state.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"8 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143401576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transverse orbital angular momentum and polarization entangled spatiotemporal structured light

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-12 DOI: 10.1515/nanoph-2024-0764

Hsiao-Chih Huang, Kefu Mu, Hui Min Leung, Chen-Ting Liao

引用次数: 0

Ultrasensitive metasurface sensor based on quasi-bound states in the continuum

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-11 DOI: 10.1515/nanoph-2024-0728

Ning Li, He Chen, Yunxia Zhao, Yongtian Wang, Zhaoxian Su, Yin Liu, Lingling Huang

{"title":"Ultrasensitive metasurface sensor based on quasi-bound states in the continuum","authors":"Ning Li, He Chen, Yunxia Zhao, Yongtian Wang, Zhaoxian Su, Yin Liu, Lingling Huang","doi":"10.1515/nanoph-2024-0728","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0728","url":null,"abstract":"The quasi-bound state in the continuum (quasi-BIC) of dielectric metasurface provides a crucial platform for sensing, because its almost infinite Q-factor can greatly enhance the interactions between light waves and the analytes. In this work, we proposed an ultrasensitive all-dielectric metasurface sensor composed of periodic rectangular amorphous silicon pillars on a quartz substrate. By breaking symmetry of two pillars in unit cell, high Q quasi-BIC in the continuous near-infrared band can be excited. The magnetic toroidal dipole (MTD) is demonstrated to play a dominating role in the resonant modes by analyzing near-field distribution and multipole decomposition. The asymmetry degree has a significant impact on sensing performance of the proposed metasurface sensor, whose underlying physical mechanisms is analyzed by perturbation theory. The transmission spectrum and sensing performance of the fabricated metasurface sensor were measured. The experimental results show our designed metasurface sensor not only achieve a high sensitivity of 413/RIU, but also shows a high figure of merit (FOM) of 66 RIU−1. This work provides excellent prospects for the excitation of strong MTD resonance quasi-BIC in sensing applications.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"95 4 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neural network-based analysis algorithm on Mueller matrix data of spectroscopic ellipsometry for the structure evaluation of nanogratings with various optical constants

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-11 DOI: 10.1515/nanoph-2024-0565

Juwon Jung, Nagyeong Kim, Kibaek Kim, Jongkyoon Park, Yong Jai Cho, Won Chegal, Young-Joo Kim

{"title":"Neural network-based analysis algorithm on Mueller matrix data of spectroscopic ellipsometry for the structure evaluation of nanogratings with various optical constants","authors":"Juwon Jung, Nagyeong Kim, Kibaek Kim, Jongkyoon Park, Yong Jai Cho, Won Chegal, Young-Joo Kim","doi":"10.1515/nanoph-2024-0565","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0565","url":null,"abstract":"Accurate and fast characterization of nanostructures using spectroscopic ellipsometry (SE) is required in both industrial and research fields. However, conventional methods used in SE data analysis often face challenges in balancing accuracy and speed, especially for the in situ monitoring on complex nanostructures. Additionally, optical constants are so crucial for accurately predicting structural parameters since SE data were strongly related to them. This study proposes a three-step algorithm designed for fast and accurate extraction of structural parameters from SE measurements. The method utilizes three neural networks, each trained on simulation data, to obtain optical constants and progressively refine the prediction on structural parameters at each step. When tested on both simulation and measurement data on the fabricated 1D SiO2 nanograting specimen, the algorithm demonstrated both high accuracy and fast analysis speed, with average mean absolute error (MAE) of 0.103 nm and analysis speed of 132 ms. Also, the proposed algorithm shows more flexibility in accounting for any change of optical constants to serve as a more efficient solution in the real-time monitoring.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"62 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband perfect Littrow diffraction metasurface under large-angle incidence

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-08 DOI: 10.1515/nanoph-2024-0622

Jingyuan Zhu, Siliang Zhou, Tao He, Chao Feng, Zhanshan Wang, Siyu Dong, Xinbin Cheng

{"title":"Broadband perfect Littrow diffraction metasurface under large-angle incidence","authors":"Jingyuan Zhu, Siliang Zhou, Tao He, Chao Feng, Zhanshan Wang, Siyu Dong, Xinbin Cheng","doi":"10.1515/nanoph-2024-0622","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0622","url":null,"abstract":"Littrow diffraction devices are commonly used in the laser field (e.g., laser resonators and spectrometers), where system integration requires larger incidence angles and perfect broadband efficiency. Compared to traditional diffraction devices, which struggle to manipulate light paths under large-angle incidence, metasurfaces has the potential to enhance the broadband efficiency. Despite quasi three-dimensional metasurfaces effects, only perfect anomalous reflection under normal incidence at limited wavelengths was achieved due to energy flow mismatch in the broadband Littrow configuration. Here, we propose a supercell metasurface capable of regulating broadband non-local responses. The metasurface effectively suppresses non-local responses under Littrow mounting, while providing sufficient non-local responses through strong structural coupling effects when the incidence deviates from the Littrow mounting. A large-angle broadband Littrow diffraction metasurface in the mid-infrared spectrum (3.11 µm ∼ 3.52 µm) has been successfully realized, with 99 % efficiency at Littrow angle of 70°. Our results break through the bandwidth limitations of perfect diffraction, providing robust support for the practical applications of metasurfaces in Littrow diffraction devices.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"21 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143371509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photonic neural networks at the edge of spatiotemporal chaos in multimode fibers

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-08 DOI: 10.1515/nanoph-2024-0593

Bahadır Utku Kesgin, Uğur Teğin

{"title":"Photonic neural networks at the edge of spatiotemporal chaos in multimode fibers","authors":"Bahadır Utku Kesgin, Uğur Teğin","doi":"10.1515/nanoph-2024-0593","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0593","url":null,"abstract":"Optical computing has gained significant attention as a potential solution to the growing computational demands of machine learning, particularly for tasks requiring large-scale data processing and high energy efficiency. Optical systems offer promising alternatives to digital neural networks by exploiting light’s parallelism. This study explores a photonic neural network design using spatiotemporal chaos within graded-index multimode fibers to improve machine learning performance. Through numerical simulations and experiments, we show that chaotic light propagation in multimode fibers enhances data classification accuracy across domains, including biomedical imaging, fashion, and satellite geospatial analysis. This chaotic optical approach enables high-dimensional transformations, amplifying data separability and differentiation for greater accuracy. Fine-tuning parameters such as pulse peak power optimizes the reservoir’s chaotic properties, highlighting the need for careful calibration. These findings underscore the potential of chaos-based nonlinear photonic neural networks to advance optical computing in machine learning, paving the way for efficient, scalable architectures.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"11 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Data-efficient prediction of OLED optical properties enabled by transfer learning

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-08 DOI: 10.1515/nanoph-2024-0505

Jeong Min Shin, Sanmun Kim, Sergey G. Menabde, Sehong Park, In-Goo Lee, Injue Kim, Min Seok Jang

{"title":"Data-efficient prediction of OLED optical properties enabled by transfer learning","authors":"Jeong Min Shin, Sanmun Kim, Sergey G. Menabde, Sehong Park, In-Goo Lee, Injue Kim, Min Seok Jang","doi":"10.1515/nanoph-2024-0505","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0505","url":null,"abstract":"It has long been desired to enable global structural optimization of organic light-emitting diodes (OLEDs) for maximal light extraction. The most critical obstacles to achieving this goal are time-consuming optical simulations and discrepancies between simulation and experiment. In this work, by leveraging transfer learning, we demonstrate that fast and reliable prediction of OLED optical properties is possible with several times higher data efficiency compared to previously demonstrated surrogate solvers based on artificial neural networks. Once a neural network is trained for a base OLED structure, it can be transferred to predict the properties of modified structures with additional layers with a relatively small number of additional training samples. Moreover, we demonstrate that, with only a few tenths of experimental data sets, a neural network can be trained to accurately predict experimental measurements of OLEDs, which often differ from simulation results due to fabrication and measurement errors. This is enabled by transferring a pre-trained network, built with a large amount of simulated data, to a new network capable of correcting systematic errors in experiment. Our work proposes a practical approach to designing and optimizing OLED structures with a large number of design parameters to achieve high optical efficiency.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"21 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemically modulated single-molecule localization microscopy for in vitro imaging cytoskeletal protein structures

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-08 DOI: 10.1515/nanoph-2024-0559

Chenghong Lei, Dehong Hu

{"title":"Electrochemically modulated single-molecule localization microscopy for in vitro imaging cytoskeletal protein structures","authors":"Chenghong Lei, Dehong Hu","doi":"10.1515/nanoph-2024-0559","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0559","url":null,"abstract":"A new concept of electrochemically modulated single-molecule localization super-resolution imaging is developed. Applications of single-molecule localization super-resolution microscopy have been limited due to insufficient availability of qualified fluorophores with favorable low duty cycles. The key for the new concept is that the “On” state of a redox-active fluorophore with unfavorable high duty cycle could be driven to “Off” state by electrochemical potential modulation and thus become available for single-molecule localization imaging. The new concept was carried out using redox-active cresyl violet with unfavorable high duty cycle as a model fluorophore by synchronizing electrochemical potential scanning with a single-molecule localization microscope. The two cytoskeletal protein structures, the microtubules from porcine brain and the actins from rabbit muscle, were selected as the model target structures for the conceptual imaging in vitro. The super-resolution images of microtubules and actins were obtained from precise single-molecule localizations determined by modulating the On/Off states of single fluorophore molecules on the cytoskeletal proteins via electrochemical potential scanning. Importantly, this method could allow more fluorophores even with unfavorable photophysical properties to become available for a wider and more extensive application of single-molecule localization microscopy.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"29 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143371588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Realizing electronically reconfigurable intrinsic chirality: from no absorption to maximal absorption of any desirable spin 实现电子可重构本征手性：从无吸收到任何理想自旋的最大吸收

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-08 DOI: 10.1515/nanoph-2024-0626

Muhammad Ismail Khan, Tayyab Ali Khan, Moustafa Abdelbaky, Alex M. H. Wong

引用次数: 0

Electrodynamics of photo-carriers in multiferroic Eu0.75Y0.25MnO3

IF 7.5 2区物理与天体物理

Nanophotonics Pub Date : 2025-02-07 DOI: 10.1515/nanoph-2024-0641

Yue Huang, Rolando V. Aguilar, Stuart A. Trugman, Sang-Wook Cheong, Yuan Long, Min-Cheol Lee, Jian-Xin Zhu, Priscila F.S. Rosa, Rohit P. Prasankumar, Dmitry A. Yarotski, Abul Azad, Nicholas S. Sirica, Antoinette J. Taylor

{"title":"Electrodynamics of photo-carriers in multiferroic Eu0.75Y0.25MnO3","authors":"Yue Huang, Rolando V. Aguilar, Stuart A. Trugman, Sang-Wook Cheong, Yuan Long, Min-Cheol Lee, Jian-Xin Zhu, Priscila F.S. Rosa, Rohit P. Prasankumar, Dmitry A. Yarotski, Abul Azad, Nicholas S. Sirica, Antoinette J. Taylor","doi":"10.1515/nanoph-2024-0641","DOIUrl":"https://doi.org/10.1515/nanoph-2024-0641","url":null,"abstract":"Understanding and controlling the antiferromagnetic order in multiferroic materials on an ultrafast time scale is a long standing area of interest, due to their potential applications in spintronics and ultrafast magnetoelectric switching. We present an optical pump-terahertz (THz) probe study on multiferroic Eu0.75Y0.25MnO3. The optical pump predominantly excites the d-d transitions of the Mn3+ ions, and the temporal evolution of the pump-induced transient conductivity is measured with a subsequent THz pulse. Two distinct, temperature-dependent decay times are revealed. The shorter relaxation time corresponds to spin-lattice thermalization, while the longer one is ascribed to electron-hole recombination. A spin-selection rule in the relaxation process is proposed in the magnetic phase. Slight suppression of the electromagnons was observed after the optical pump pulse within the spin-lattice thermalization time scale. These observed fundamental magnetic processes can shed light on ultrafast control of magnetism and photoinduced phase transitions in multiferroics.","PeriodicalId":19027,"journal":{"name":"Nanophotonics","volume":"55 1","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0