arXiv - PHYS - Optics最新文献_第6页

Analytical approach for pure high, even-order dispersion solitons 纯高偶阶频散孤子的分析方法

arXiv - PHYS - Optics Pub Date : 2024-09-11 DOI: arxiv-2409.07075

Xing Liao, Jiahan Huang, Daquan Lu, Wei Hu

引用次数: 0

Efficient finite element modeling of photonic modal analysis augmented by combined symmetry 通过组合对称增强光子模态分析的高效有限元建模

arXiv - PHYS - Optics Pub Date : 2024-09-11 DOI: arxiv-2409.06962

Jingwei Wang, Lida Liu, Yuhao Jing, Zhongfei Xiong, Yuntian Chen

引用次数: 0

Next-Generation Multi-layer Metasurface Design: Hybrid Deep Learning Models for Beyond-RGB Reconfigurable Structural Colors 下一代多层元表面设计：针对 Beyond-RGB 可重构结构色彩的混合深度学习模型

arXiv - PHYS - Optics Pub Date : 2024-09-11 DOI: arxiv-2409.07121

Omar A. M. Abdelraouf, Ahmed Mousa, Mohamed Ragab

{"title":"Next-Generation Multi-layer Metasurface Design: Hybrid Deep Learning Models for Beyond-RGB Reconfigurable Structural Colors","authors":"Omar A. M. Abdelraouf, Ahmed Mousa, Mohamed Ragab","doi":"arxiv-2409.07121","DOIUrl":"https://doi.org/arxiv-2409.07121","url":null,"abstract":"Metasurfaces are key to the development of flat optics and nanophotonic\u0000devices, offering significant advantages in creating structural colors and\u0000high-quality factor cavities. Multi-layer metasurfaces (MLMs) further amplify\u0000these benefits by enhancing light-matter interactions within individual\u0000nanopillars. However, the numerous design parameters involved make traditional\u0000simulation tools impractical and time-consuming for optimizing MLMs. This\u0000highlights the need for more efficient approaches to accelerate their design.\u0000In this work, we introduce NanoPhotoNet, an AI-driven design tool based on a\u0000hybrid deep neural network (DNN) model that combines convolutional neural\u0000networks (CNN) and Long Short-Term Memory (LSTM) networks. NanoPhotoNet\u0000enhances the design and optimization of MLMs, achieving a prediction accuracy\u0000of over 98.3% and a speed improvement of 50,000x compared to conventional\u0000methods. The tool enables MLMs to produce structural colors beyond the standard\u0000RGB region, expanding the RGB gamut area by 163%. Furthermore, we demonstrate\u0000the generation of tunable structural colors, extending the metasurface\u0000functionality to tunable color filters. These findings present a powerful\u0000method for applying NanoPhotoNet to MLMs, enabling strong light-matter\u0000interactions in applications such as tunable nanolasers and reconfigurable beam\u0000steering.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Moiré exciton polaron engineering via twisted hBN 通过扭曲氢化硼实现莫伊里激子极子工程

arXiv - PHYS - Optics Pub Date : 2024-09-11 DOI: arxiv-2409.06999

Minhyun Cho, Biswajit Datta, Kwanghee Han, Saroj B. Chand, Pratap Chandra Adak, Sichao Yu, Fengping Li, Kenji Watanabe, Takashi Taniguchi, James Hone, Jeil Jung, Gabriele Grosso, Young Duck Kim, Vinod M. Menon

{"title":"Moiré exciton polaron engineering via twisted hBN","authors":"Minhyun Cho, Biswajit Datta, Kwanghee Han, Saroj B. Chand, Pratap Chandra Adak, Sichao Yu, Fengping Li, Kenji Watanabe, Takashi Taniguchi, James Hone, Jeil Jung, Gabriele Grosso, Young Duck Kim, Vinod M. Menon","doi":"arxiv-2409.06999","DOIUrl":"https://doi.org/arxiv-2409.06999","url":null,"abstract":"Twisted hexagonal boron nitride (thBN) exhibits emergent ferroelectricity due\u0000to the formation of moir'e superlattices with alternating AB and BA domains.\u0000These domains possess electric dipoles, leading to a periodic electrostatic\u0000potential that can be imprinted onto other 2D materials placed in its\u0000proximity. Here we demonstrate the remote imprinting of moir'e patterns from\u0000twisted hexagonal boron nitride (thBN) onto monolayer MoSe2 and investigate the\u0000resulting changes in the exciton properties. We confirm the imprinting of\u0000moir'e patterns on monolayer MoSe2 via proximity using Kelvin probe force\u0000microscopy (KPFM) and hyperspectral photoluminescence (PL) mapping. By\u0000developing a technique to create large ferroelectric domain sizes ranging from\u00001 {mu}m to 8.7 {mu}m, we achieve unprecedented potential modulation of 387 +-\u000052 meV. We observe the formation of exciton polarons due to charge\u0000redistribution caused by the antiferroelectric moir'e domains and investigate\u0000the optical property changes induced by the moir'e pattern in monolayer MoSe2\u0000by varying the moir'e pattern size down to 110 nm. Our findings highlight the\u0000potential of twisted hBN as a platform for controlling the optical and\u0000electronic properties of 2D materials for optoelectronic and valleytronic\u0000applications.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On-chip twisted hollow-core light cages: enhancing planar photonics with 3D nanoprinting 片上扭曲空芯光笼：利用三维纳米打印技术增强平面光子学

arXiv - PHYS - Optics Pub Date : 2024-09-11 DOI: arxiv-2409.07602

Johannes Bürger, Jisoo Kim, Thomas Weiss, Stefan A. Maier, Markus A. Schmidt

{"title":"On-chip twisted hollow-core light cages: enhancing planar photonics with 3D nanoprinting","authors":"Johannes Bürger, Jisoo Kim, Thomas Weiss, Stefan A. Maier, Markus A. Schmidt","doi":"arxiv-2409.07602","DOIUrl":"https://doi.org/arxiv-2409.07602","url":null,"abstract":"Twisted optical fibers are a promising platform for manipulating circularly\u0000polarized light and orbital angular momentum beams for applications such as\u0000nonlinear frequency conversion, optical communication, or chiral sensing.\u0000However, integration into chip-scale technology is challenging because twisted\u0000fibers are incompatible with planar photonics and the achieved twist rates are\u0000limited. Here, we address these challenges by introducing the concept of\u00003D-nanoprinted on-chip twisted hollow-core light cages. We show theoretically\u0000and experimentally that geometrical twisting of light cages forces the\u0000fundamental core mode of a given handedness to couple with selected\u0000higher-order core modes, resulting in strong circular dichroism (CD). These\u0000chiral resonances result from the angular momentum harmonics of the fundamental\u0000mode, allowing us to predict their spectral locations and the occurrence of\u0000circular birefringence. Twisted light cages enable very high twist rates and\u0000CD, exceeding those of twisted hollow-core fibers by more than two orders of\u0000magnitude (twist period: 90 $mu$m, CD: 0.8 dB/mm). Moreover, the unique cage\u0000design provides lateral access to the central core region, enabling future\u0000applications in chiral spectroscopy. Therefore, the presented concept opens a\u0000path for translating twisted fiber research to on-chip technology, resulting in\u0000a new platform for integrated chiral photonics.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time-varying Nonlinear Effects in Terahertz Generation 太赫兹生成中的时变非线性效应

arXiv - PHYS - Optics Pub Date : 2024-09-11 DOI: arxiv-2409.07266

Yongchang Lu, Xueqian Zhang, Haidi Qiu, Li Niu, Xieyu Chen, Quan Xu, Weili Zhang, Shuang Zhang, Jiaguang Han

{"title":"Time-varying Nonlinear Effects in Terahertz Generation","authors":"Yongchang Lu, Xueqian Zhang, Haidi Qiu, Li Niu, Xieyu Chen, Quan Xu, Weili Zhang, Shuang Zhang, Jiaguang Han","doi":"arxiv-2409.07266","DOIUrl":"https://doi.org/arxiv-2409.07266","url":null,"abstract":"Time-varying effects have unveiled new possibilities for manipulating\u0000electromagnetic waves through the temporal dimension. In this study, we\u0000experimentally explore these effects in the nonlinear optical process of\u0000terahertz (THz) generation using optically pumped indium tin oxide (ITO) films.\u0000The ultrafast carrier dynamics in the ITO film endow the second-order nonlinear\u0000susceptibility (c{hi}(2)) with sub-picosecond temporal evolution, establishing\u0000a temporal boundary for the generated THz waves. We observe significant\u0000amplitude and frequency modulations in the THz generation at various\u0000transients, attributed to the time-varying complex amplitude of the c{hi}(2).\u0000Moreover, we also observed polarization modulations when further exploiting the\u0000tensor properties of c{hi}(2). This work advances the exploration of\u0000time-varying effects into the nonlinear regime through frequency\u0000down-conversion, effectively transferring the strong time-varying material\u0000response from the near-infrared (NIR) band to the THz band. These findings open\u0000up new opportunities for realizing time-varying phenomena that specifically\u0000require single-cycle modulation.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Excitonic signatures of ferroelectric order in parallel-stacked MoS$_2$ 平行堆叠 MoS$_2$ 中铁电秩序的激子特征

arXiv - PHYS - Optics Pub Date : 2024-09-11 DOI: arxiv-2409.07234

Swarup Deb, Johannes Krause, Paulo E. Faria Junior, Michael Andreas Kempf, Rico Schwartz, Kenji Watanabe, Takashi Taniguchi, Jaroslav Fabian, Tobias Korn

{"title":"Excitonic signatures of ferroelectric order in parallel-stacked MoS$_2$","authors":"Swarup Deb, Johannes Krause, Paulo E. Faria Junior, Michael Andreas Kempf, Rico Schwartz, Kenji Watanabe, Takashi Taniguchi, Jaroslav Fabian, Tobias Korn","doi":"arxiv-2409.07234","DOIUrl":"https://doi.org/arxiv-2409.07234","url":null,"abstract":"Interfacial ferroelectricity, prevalent in various parallel-stacked layered\u0000materials, allows switching of out-of-plane ferroelectric order by in-plane\u0000sliding of adjacent layers. Its resilience against doping potentially enables\u0000next-generation storage and logic devices. However, studies have been limited\u0000to indirect sensing or visualization of ferroelectricity. For transition metal\u0000dichalcogenides, there is little knowledge about the influence of ferroelectric\u0000order on their intrinsic valley and excitonic properties. Here, we report\u0000direct probing of ferroelectricity in few-layer 3R-MoS$_2$ using reflectance\u0000contrast spectroscopy. Contrary to a simple electrostatic perception,\u0000layer-hybridized excitons with out-of-plane electric dipole moment remain\u0000decoupled from ferroelectric ordering, while intralayer excitons with in-plane\u0000dipole orientation are sensitive to it. Ab initio calculations identify\u0000stacking-specific interlayer hybridization leading to this asymmetric response.\u0000Exploiting this sensitivity, we demonstrate optical readout and control of\u0000multi-state polarization with hysteretic switching in a field-effect device.\u0000Time-resolved Kerr ellipticity reveals a direct correspondence between\u0000spin-valley dynamics and stacking order.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An effective and reliable approach to the phase problem in single-shot single-particle Coherent Diffraction Imaging 解决单发单粒子相干衍射成像中相位问题的有效可靠方法

arXiv - PHYS - Optics Pub Date : 2024-09-11 DOI: arxiv-2409.07413

Alessandro Colombo, Mario Sauppe, Andre Al Haddad, Kartik Ayyer, Morsal Babayan, Ritika Dagar, Linos Hecht, Gregor Knopp, Katharina Kolatzki, Filipe Maia, Abhishek Mall, Parichita Mazumder, Kirsten Schnorr, Arezu Sehati, Jonas A. Sellberg, Zhibin Sun, Pamela Svensson, Paul Tümmler, Carl Frederic Ussling, Onni Veteläinen, Noelle Walsh, Tong You, Shen Zhou, Christoph Bostedt, Minna Patanen, Daniela Rupp

{"title":"An effective and reliable approach to the phase problem in single-shot single-particle Coherent Diffraction Imaging","authors":"Alessandro Colombo, Mario Sauppe, Andre Al Haddad, Kartik Ayyer, Morsal Babayan, Ritika Dagar, Linos Hecht, Gregor Knopp, Katharina Kolatzki, Filipe Maia, Abhishek Mall, Parichita Mazumder, Kirsten Schnorr, Arezu Sehati, Jonas A. Sellberg, Zhibin Sun, Pamela Svensson, Paul Tümmler, Carl Frederic Ussling, Onni Veteläinen, Noelle Walsh, Tong You, Shen Zhou, Christoph Bostedt, Minna Patanen, Daniela Rupp","doi":"arxiv-2409.07413","DOIUrl":"https://doi.org/arxiv-2409.07413","url":null,"abstract":"Coherent Diffraction Imaging (CDI) is an experimental technique to get images\u0000of isolated structures by recording the light scattered off the sample. Thanks\u0000to the extremely bright and short coherent light pulses provided by X-ray Free\u0000Electron Lasers, CDI makes it possible to study nanostructures in the gas phase\u0000and get time-resolved snapshots of their ultrafast dynamics with unprecedented\u0000resolution. In principle, the sample density can be recovered from the\u0000scattered light field through a straightforward Fourier Transform operation.\u0000However, only the amplitude of the field is recorded, while the phase is lost\u0000during the measurement process and has to be retrieved by means of suitable,\u0000well-established, phase retrieval algorithms. We present the Memetic Phase\u0000Retrieval (MPR) method, an improved approach to the phase retrieval problem,\u0000which makes use of a combination of existing phase retrieval algorithms and\u0000evolutionary algorithms to mitigate the shortcomings of conventional\u0000approaches. We benchmark the method on experimental data acquired in two\u0000experimental campaigns at SwissFEL and European XFEL. Imaging results on\u0000isolated nanostructures reveal considerable stability of the algorithm's\u0000behavior on the input parameters, as well as the capability of identifying the\u0000solution in challenging conditions. A user-friendly implementation of the MPR\u0000method is released as open-source software, aiming at being a reference tool\u0000for the FEL imaging community.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optomechanical sensor network with fiber Bragg gratings 带有光纤布拉格光栅的光机械传感器网络

arXiv - PHYS - Optics Pub Date : 2024-09-11 DOI: arxiv-2409.06943

Shiwei Yang, Qiang Zhang, Linrun Yang, Hanghua Liu, Quansen Wang, Pengfei Zhang, Heng Shen, Yongmin Li

{"title":"Optomechanical sensor network with fiber Bragg gratings","authors":"Shiwei Yang, Qiang Zhang, Linrun Yang, Hanghua Liu, Quansen Wang, Pengfei Zhang, Heng Shen, Yongmin Li","doi":"arxiv-2409.06943","DOIUrl":"https://doi.org/arxiv-2409.06943","url":null,"abstract":"Cavity optomechanics offers a versatile platform for both fundamental physics\u0000and ultrasensitive sensing. Importantly, resonant enhancement in both optical\u0000and mechanical responses enables the highly sensitive optical detection of\u0000small forces, displacements, vibrations, and magnetic fields, enabling it a\u0000promising candidate of the next generation of ultrasensitive sensor networks.\u0000However, this is impeded by the fiber optic-incompatibility and intrinsic\u0000nature of existing optomechanical sensors. Here, we report the first\u0000demonstration of an optomechanical sensor network in terms of magnetic field\u0000detection, wherein multiple fiber-optic optomechanical sensors are connected\u0000into a standard single mode fiber. Building upon a commercially available fiber\u0000Bragg gratings, we realize a robust low-loss, low-noise, and\u0000polarization-insensitive coupling with light sources in a way compatible with\u0000fiber optics. This thus enables our optomechanical senor to fulfill the\u0000requirements for ultrasensitive sensor networks. Furthermore, in this sensor\u0000network we demonstrate the sensitivity of 8.73 pm/Gs for DC magnetic fields and\u0000537 fT/Hz1/2 for AC magnetic fields in a magnetically unshielded environment\u0000with the ambient temperature and pressure, better than the reported values in\u0000previous optomechanical magnetometers. Our work sheds light on exploiting\u0000cavity optomechanics in the practical applications and ultrasensitive senor\u0000networks.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis by Size Focusing of Lithium Tantalate Nanoparticles with a Tunable Second Harmonic Optical Activity 通过尺寸聚焦合成具有可调二次谐波光学活性的钽酸锂纳米粒子

arXiv - PHYS - Optics Pub Date : 2024-09-10 DOI: arxiv-2409.06825

Rana Faryad Ali, Byron D. Gates

{"title":"Synthesis by Size Focusing of Lithium Tantalate Nanoparticles with a Tunable Second Harmonic Optical Activity","authors":"Rana Faryad Ali, Byron D. Gates","doi":"arxiv-2409.06825","DOIUrl":"https://doi.org/arxiv-2409.06825","url":null,"abstract":"Nonlinear optics at the nanoscale has emerged as a sought-after platform for\u0000sensing and imaging applications. The development of these materials is having\u0000an impact on fields that include advanced information technology, signal\u0000processing circuits, and cryptography. Lithium tantalate (LiTaO3) is an\u0000attractive nonlinear optical material due to its high optical damage threshold\u0000(e.g., tolerance to greater than 500 MW per cm^2 from a nanosecond pulsed\u0000laser) and broad range of ultraviolet-visible (UV-Vis) transparency relative to\u0000many other nonlinear optical materials. Despite many synthetic reports on metal\u0000oxides, very little is known about the preparation of uniform, crystalline\u0000LiTaO3 nanoparticles (NPs) of a pure phase, as well as details on their\u0000mechanism of nucleation and growth. In this article, we introduce a\u0000solution-phase method for the preparation of LiTaO3 NPs with tunable\u0000dimensions. This solution-phase process results in the formation of\u0000crystalline, uniform NPs of LiTaO3 of a pure phase when carried out at 220 C.\u0000This method can prepare crystalline LiTaO3 NPs without the need for further\u0000heat treatment or the use of an inert atmosphere. Results presented herein also\u0000provide insights into the growth mechanism of these NPs. The reaction included\u0000the processes of oriented attachment and Ostwald ripening. The results of our\u0000study also indicate that the growth of the LiTaO3 NPs was a result of a size\u0000focusing effect, which enables the ability to tune their diameters from 200 to\u0000500 nm. The crystalline NPs were optically active towards second harmonic\u0000generation. These studies deepen our understanding of the methods by which NPs\u0000can be prepared from metal oxides. These studies specifically demonstrate the\u0000preparation of optically active LiTaO3 NPs of uniform and controllable\u0000dimensions that could be used in a broad range of fundamental studies and\u0000applications in nanophotonics.","PeriodicalId":501214,"journal":{"name":"arXiv - PHYS - Optics","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142183521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0