APL Photonics最新文献_第7页

Laser-written waveguide-integrated coherent spins in diamond 金刚石中的激光写入波导集成相干自旋

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-07-01 DOI: 10.1063/5.0209294

Yanzhao Guo, John P. Hadden, Federico Gorrini, Giulio Coccia, Vibhav Bharadwaj, Vinaya Kumar Kavatamane, Mohammad Sahnawaz Alam, Roberta Ramponi, Paul E. Barclay, Andrea Chiappini, Maurizio Ferrari, Alexander Kubanek, Angelo Bifone, Shane M. Eaton, Anthony J. Bennett

引用次数: 0

Retrieving genuine nonlinear Raman responses in ultrafast spectroscopy via deep learning 通过深度学习检索超快光谱学中真正的非线性拉曼响应

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-06-28 DOI: 10.1063/5.0198013

Giuseppe Fumero, Giovanni Batignani, Edoardo Cassetta, Carino Ferrante, Stefano Giagu, Tullio Scopigno

{"title":"Retrieving genuine nonlinear Raman responses in ultrafast spectroscopy via deep learning","authors":"Giuseppe Fumero, Giovanni Batignani, Edoardo Cassetta, Carino Ferrante, Stefano Giagu, Tullio Scopigno","doi":"10.1063/5.0198013","DOIUrl":"https://doi.org/10.1063/5.0198013","url":null,"abstract":"Noise manifests ubiquitously in nonlinear spectroscopy, where multiple sources contribute to experimental signals generating interrelated unwanted components, from random point-wise fluctuations to structured baseline signals. Mitigating strategies are usually heuristic, depending on subjective biases such as the setting of parameters in data analysis algorithms and the removal order of the unwanted components. We propose a data-driven frequency-domain denoiser based on a convolutional neural network to extract authentic vibrational features from a nonlinear background in noisy spectroscopic raw data. The different spectral scales in the problem are treated in parallel by means of filters with multiple kernel sizes, which allow the receptive field of the network to adapt to the informative features in the spectra. We test our approach by retrieving asymmetric peaks in stimulated Raman spectroscopy, an ideal test-bed due to its intrinsic complex spectral features combined with a strong background signal. By using a theoretical perturbative toolbox, we efficiently train the network with simulated datasets resembling the statistical properties and lineshapes of the experimental spectra. The developed algorithm is successfully applied to experimental data to obtain noise- and background-free stimulated Raman spectra of organic molecules and prototypical heme proteins.","PeriodicalId":8198,"journal":{"name":"APL Photonics","volume":"30 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502407","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

Best practices in measuring absorption at the macro- and microscale 宏观和微观测量吸收的最佳做法

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-06-26 DOI: 10.1063/5.0210830

A. R. Bowman, J. Ma, F. Kiani, G. García Martínez, G. Tagliabue

引用次数: 0

Rational design of efficient defect-based quantum emitters 基于缺陷的高效量子发射器的合理设计

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-06-26 DOI: 10.1063/5.0203366

Mark E. Turiansky, Kamyar Parto, Galan Moody, Chris G. Van de Walle

引用次数: 0

Three-dimensional hard X-ray ptychographic reflectometry imaging on extended mesoscopic surface structures 扩展介观表面结构的三维硬 X 射线层析反射成像技术

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-06-26 DOI: 10.1063/5.0204240

Peco Myint, Ashish Tripathi, Michael J. Wojcik, Junjing Deng, Mathew J. Cherukara, Nicholas Schwarz, Suresh Narayanan, Jin Wang, Miaoqi Chu, Zhang Jiang

{"title":"Three-dimensional hard X-ray ptychographic reflectometry imaging on extended mesoscopic surface structures","authors":"Peco Myint, Ashish Tripathi, Michael J. Wojcik, Junjing Deng, Mathew J. Cherukara, Nicholas Schwarz, Suresh Narayanan, Jin Wang, Miaoqi Chu, Zhang Jiang","doi":"10.1063/5.0204240","DOIUrl":"https://doi.org/10.1063/5.0204240","url":null,"abstract":"Many nanodevices and quantum devices, with their sizes often spanning from millimeters down to sub-nanometer, have intricate low-dimensional, non-uniform, or hierarchical structures on surfaces and interfaces. Since their functionalities are dependent on these structures, high-resolution surface-sensitive characterization becomes imperative to gain a comprehensive understanding of the function–structure relationship. We thus developed hard x-ray ptychographic reflectometry imaging, a new technique that merges the high-resolution two-dimensional imaging capabilities of hard x-ray ptychography for extended objects, with the high-resolution depth profiling capabilities of x-ray reflectivity for layered structures. The synergy of these two methods fully leverages both amplitude and phase information from ptychography reconstruction to not only reveal surface topography and localized structures, such as shapes and electron densities, but also yields statistical details, such as interfacial roughness that is not readily accessible through coherent imaging solely. The hard x-ray ptychographic reflectometry imaging is well-suited for three-dimensional imaging of mesoscopic samples, particularly those comprising planar or layered nanostructures on opaque supports, and could also offer a high-resolution surface metrology and defect analysis on semiconductor devices, such as integrated nanocircuits and lithographic photomasks for microchip fabrications.","PeriodicalId":8198,"journal":{"name":"APL Photonics","volume":"67 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141517032","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

CMOS-compatible high-speed endless automatic polarization controller 与 CMOS 兼容的高速无尽自动偏振控制器

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-06-25 DOI: 10.1063/5.0198227

Weiqin Wang, Ziwen Zhou, Yifan Zeng, Jingze Liu, Gengqi Yao, Hao Wu, Yunhong Ding, Siyan Zhou, Siqi Yan, Ming Tang

{"title":"CMOS-compatible high-speed endless automatic polarization controller","authors":"Weiqin Wang, Ziwen Zhou, Yifan Zeng, Jingze Liu, Gengqi Yao, Hao Wu, Yunhong Ding, Siyan Zhou, Siqi Yan, Ming Tang","doi":"10.1063/5.0198227","DOIUrl":"https://doi.org/10.1063/5.0198227","url":null,"abstract":"Automatic polarization controllers find broad applications in various fields, including optical communication, quantum optics, optical sensing, and biomedicine. Currently, the predominant integrated automatic polarization controllers employ either lithium niobate or silicon platforms. Devices based on lithium niobate platforms exhibit excellent performance; however, their fabrication complexity hinders widespread commercial deployment. In contrast, silicon-based integrated automatic polarization controllers benefit from complementary metal–oxide–semiconductor compatibility and reduced fabrication costs. Nevertheless, these silicon automatic polarization controllers suffer from low tracking speeds, peaking at merely 1.256 krad/s. In this study, we demonstrated a silicon high-speed automatic polarization controller, incorporating innovative thermal tuning units combined with a sophisticated control algorithm. The response time of these thermal tuning units has been markedly decreased to 3.2 µs. In addition, we have implemented a novel automatic polarization control algorithm, utilizing gradient descent techniques, on a field-programmable gate array control board. The synergy of the rapid thermal tuning unit and the advanced control algorithm has enabled us to attain an unprecedented polarization control speed of up to 20 krad/s, with this rate being solely limited by the capabilities of our characterization equipment. To our knowledge, this speed is the fastest yet reported for a silicon-based integrated automatic polarization control chip. The proposed device represents a significant breakthrough in the field of silicon-based automatic polarization controllers, paving the way for the future integration of additional polarization management devices. Such an advancement would mark a substantial leap in the realm of integrated photonics, bridging the gap between performance efficiency, cost-effectiveness, and technological integration.","PeriodicalId":8198,"journal":{"name":"APL Photonics","volume":"1 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141516976","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

Light bullet generation via stimulated Brillouin scattering 通过受激布里渊散射产生光子弹

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-06-25 DOI: 10.1063/5.0201756

Der-Han Huang, Cheng Guo, Shanhui Fan

引用次数: 0

Toward robust super-resolution imaging: A low-rank approximation approach for pattern-illuminated Fourier ptychography 实现稳健的超分辨率成像：模式照亮傅立叶层析成像的低阶近似方法

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-06-24 DOI: 10.1063/5.0200549

Junhao Zhang, Weilong Wei, Kaiyuan Yang, Qiang Zhou, Haotong Ma, Ge Ren, Zongliang Xie

{"title":"Toward robust super-resolution imaging: A low-rank approximation approach for pattern-illuminated Fourier ptychography","authors":"Junhao Zhang, Weilong Wei, Kaiyuan Yang, Qiang Zhou, Haotong Ma, Ge Ren, Zongliang Xie","doi":"10.1063/5.0200549","DOIUrl":"https://doi.org/10.1063/5.0200549","url":null,"abstract":"Pattern-illuminated Fourier ptychography (piFP) is an elegant combination of structured illumination imaging and a Fourier ptychographic algorithm with the ability to image beyond the diffraction limit of the employed optics. Artifact-free piFP super-resolution reconstruction requires a high level of stability in the illumination pattern. However, unpredictable pattern variation occurs in the presence of environment perturbation, intensity fluctuation, and pointing instability at the source, leading to declines in image reconstruction quality. To address this issue, we present an efficient and robust piFP algorithm based on low-rank approximation (LRA-piFP), which relaxes the requirement for the stability of illumination patterns. This LRA-piFP method can model frame-wise pattern variation during a full scan, thus improve the reconstruction quality significantly. We take numerical simulations and proof-of-principle experiments with both long-range imaging and microscopy for demonstrations. Results show that the LRA-piFP method can handle different kinds of pattern variation and outperforms other state-of-the-art techniques in terms of reconstruction quality and resolution improvement. Our method provides effective experimental robustness to piFP with a natural algorithmic extension, paving the way for its application in both macroscopic and microscopic imaging.","PeriodicalId":8198,"journal":{"name":"APL Photonics","volume":"145 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141528919","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

Thermalization dynamics in photonic lattices of different geometries 不同几何形状光子晶格中的热化动力学

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-06-24 DOI: 10.1063/5.0205202

Guowen Yang, Domenico Bongiovanni, Daohong Song, Roberto Morandotti, Zhigang Chen, Nikolaos K. Efremidis

{"title":"Thermalization dynamics in photonic lattices of different geometries","authors":"Guowen Yang, Domenico Bongiovanni, Daohong Song, Roberto Morandotti, Zhigang Chen, Nikolaos K. Efremidis","doi":"10.1063/5.0205202","DOIUrl":"https://doi.org/10.1063/5.0205202","url":null,"abstract":"The statistical mechanical behavior of weakly nonlinear multimoded optical settings has been attracting increased interest over the last few years. The main purpose of this work is to numerically investigate the main factors that affect the thermalization process in photonic lattices. In particular, we find that lattices with identically selected properties (such as temperature, coupling coefficient, lattice size, and excitation conditions) can exhibit very different thermalization dynamics and, thus, thermalization distances. Our investigation is focused on two different two-dimensional lattices: the honeycomb lattice and the triangular lattice. Our numerical results show that, independently of the excitation conditions, the honeycomb lattice always thermalizes faster than the triangular lattice. We mainly explain this behavior by the quasilinear spectrum that promotes wave-mixing in the honeycomb lattice in comparison to the power-like spectrum of the triangular lattice. In addition, we investigate the combined effects of temperature as well as the sign and magnitude of the nonlinearity. Switching either the sign of the Kerr nonlinear coefficient or the sign of the temperature can lead to significant differences in the thermalization dynamics, a phenomenon that can be physically explained in terms of wave instabilities. Larger absolute values of the temperature |T| result in more uniform distributions for the power occupation numbers and faster thermalization speeds. Finally, as expected, increasing the magnitude of the nonlinearity results in accelerated thermalization. Our findings provide valuable insights into optical thermalization in discrete systems, where experimental realization may bring about new possibilities for light manipulation and applications.","PeriodicalId":8198,"journal":{"name":"APL Photonics","volume":"36 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141516978","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

Theory of transverse mode instability in fiber amplifiers with multimode excitations 具有多模激励的光纤放大器中的横模不稳定性理论

IF 5.6 1区物理与天体物理

APL Photonics Pub Date : 2024-06-21 DOI: 10.1063/5.0206859

Kabish Wisal, Chun-Wei Chen, Hui Cao, A. Douglas Stone

{"title":"Theory of transverse mode instability in fiber amplifiers with multimode excitations","authors":"Kabish Wisal, Chun-Wei Chen, Hui Cao, A. Douglas Stone","doi":"10.1063/5.0206859","DOIUrl":"https://doi.org/10.1063/5.0206859","url":null,"abstract":"Transverse Mode Instability (TMI) that results from dynamic nonlinear thermo-optical scattering is the primary limitation to power scaling in high-power fiber lasers and amplifiers. It has been proposed that TMI can be suppressed by exciting multiple modes in a highly multimode fiber. We derive a semi-analytic frequency-domain theory of the threshold for the onset of TMI in narrowband fiber amplifiers under arbitrary multimode input excitation for general fiber geometries. Our detailed model includes the effect of gain saturation, pump depletion, and mode-dependent gain. We show that TMI results from the exponential growth of noise in all the modes at downshifted frequencies due to the thermo-optical coupling. The noise growth rate in each mode is given by the sum of signal powers in various modes weighted by pairwise thermo-optical coupling coefficients. We calculate thermo-optical coupling coefficients for all ∼104 pairs of modes in a standard circular multimode fiber and show that modes with large transverse spatial frequency mismatch are weakly coupled, resulting in a banded coupling matrix. This short-range behavior is due to the diffusive nature of the heat propagation, which mediates the coupling and leads to a lower noise growth rate upon multimode excitation compared to a single mode, resulting in significant TMI suppression. We find that the TMI threshold scales linearly with the number of modes that are excited asymptotically, leading to roughly an order of magnitude increase in the TMI threshold in an 82-mode fiber amplifier.","PeriodicalId":8198,"journal":{"name":"APL Photonics","volume":"29 1","pages":""},"PeriodicalIF":5.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141516977","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