Pierre Bouvet, Flora Clement, A. Papoz, Thomas Dehoux, Jean-Charles Baritaux
{"title":"Multimode fiber-coupled VIPA spectrometer for high-throughput Brillouin imaging of biological samples","authors":"Pierre Bouvet, Flora Clement, A. Papoz, Thomas Dehoux, Jean-Charles Baritaux","doi":"10.1088/2515-7647/ad378c","DOIUrl":"https://doi.org/10.1088/2515-7647/ad378c","url":null,"abstract":"\u0000 Slow acquisition time and instrument stability are the two major limitations for the application of confocal Brillouin microscopy to biological materials. Although overlooked, coupling the microscope to the spectrometer with a multimode fiber is a simple yet viable solution to increase both the detection efficiency and the stability of the classical single-mode fiber-coupled VIPA instruments. Here we implement the first successful multimode fiber-coupled VIPA spectrometer for confocal Brillouin applications and present a dimensioning strategy to optimize its collected power. The use of a multimode fiber brings a tremendous improvement on the stability of the spectrometer that allows performing experiments over several weeks without realignment of the device. For instance, we map the Brillouin shift and linewidth in growing ductal and acinar organoids with a spatial resolution of 1 × 1 × 6μm3 and 50ms dwell time. Our results clearly reveal the formation of a lumen in these organoids. Careful examination of the data also suggests an increase in the viscosity of the cells of the assembly.","PeriodicalId":517326,"journal":{"name":"Journal of Physics: Photonics","volume":"7 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140381575","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}
Madhuparna Chakraborty, Md Mahmudul Hasan, Wojciech M Jadwisienczak, Faiz Rahman
{"title":"Comparative study of composite single crystal and polycrystalline YAG:Ce phosphors for laser-based lighting applications","authors":"Madhuparna Chakraborty, Md Mahmudul Hasan, Wojciech M Jadwisienczak, Faiz Rahman","doi":"10.1088/2515-7647/ad2bd1","DOIUrl":"https://doi.org/10.1088/2515-7647/ad2bd1","url":null,"abstract":"\u0000 YAG:Ce, a widely employed phosphor for LED wavelength conversion applications, comes in different forms, including polycrystal (powder), single crystal, and composite single crystal varieties. We investigated Epoch NeoTM, a composite single crystal incorporating Al2O3 as a heat distribution and optical guiding material embedded within its luminescent core. The properties of Epoch Neo were analyzed and compared with those of its polycrystal counterparts in this paper. Cosine corrector was used to ensure accurate spectral measurements. Multiple characterization techniques like chromaticity points, color temperature, phosphor temperature, and speckle pattern were employed to study the effect of variable laser input power on both polycrystal powder and composite single crystal of YAG:Ce. It was found that under the influence of pumping blue laser high input optical power the composite single crystal phosphor’s performance was significantly better compared to that of the polycrystal.","PeriodicalId":517326,"journal":{"name":"Journal of Physics: Photonics","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139957799","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}
A. Tretiakov, Clinton A Potts, Ying-Ying Lu, John P Davis, Lindsay J. LeBlanc
{"title":"Manipulating optical absorption and polarization using microwave control in an atomic vapour","authors":"A. Tretiakov, Clinton A Potts, Ying-Ying Lu, John P Davis, Lindsay J. LeBlanc","doi":"10.1088/2515-7647/ad2ac8","DOIUrl":"https://doi.org/10.1088/2515-7647/ad2ac8","url":null,"abstract":"\u0000 The multiplicity of atomic states (and the transitions between them) offer an innate, coherent platform through which microwave and optical fields effectively interact. In an atomic vapour near room temperature, we combine optical and microwave fields to generate a macroscopic internal angular momentum among the atoms – an atomic polarization – at an arbitrary angle with respect to the optical (laser) beam. This geometric freedom enables microwave control over photonic degrees of freedom, which we use in two demonstrations: we can rotate linear polarization through several degrees, and we can control the absorption for specific transitions and polarizations, which has applications for microwave-to-optical transduction.","PeriodicalId":517326,"journal":{"name":"Journal of Physics: Photonics","volume":"22 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139958357","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}
Mehdi Feizpour, Qing Liu, Tom Van der Donck, Hugo Thienpont, W. Meulebroeck, H. Ottevaere
{"title":"Characterizing planar SERS substrates: Unraveling the link between physical characteristics and performance metrics","authors":"Mehdi Feizpour, Qing Liu, Tom Van der Donck, Hugo Thienpont, W. Meulebroeck, H. Ottevaere","doi":"10.1088/2515-7647/ad2528","DOIUrl":"https://doi.org/10.1088/2515-7647/ad2528","url":null,"abstract":"\u0000 Surface-enhanced Raman spectroscopy (SERS) is a powerful optical sensing technique used in various applications, including medicine, microbiology, and environmental analysis. Planar SERS substrates are of particular interest due to their ease of integration in lab-on-chips and better reproducibility compared to colloidal SERS. The performance of these SERS substrates is quantified using metrics such as enhancement factor, sensitivity, and reproducibility. However, there is yet to be a consensus on how to practically compare and interpret such metrics in publications and experiments. These performance metrics are strongly influenced by the nanostructures’ material, architecture, element sizes, as well as the circumstances surrounding the experiments. Understanding the effect of these characteristics on the SERS substrates’ performance could not only enable a better performance but also direct their development for different applications. Thus, we developed a planar SERS-substrate characterization protocol to explore the correlation between the nanostructures’ physical characteristics and the performance metrics through coordinate-transformed spectroscopic measurements over structure-characterized areas. Seven commercial SERS substrates, with various surface architectures fabricated using different fabrication technologies, were studied using this benchmarking protocol. The results demonstrated how this protocol can indicate a SERS substrate’s suitability for a specific application, thus, guiding the substrate's further adaptations or development.","PeriodicalId":517326,"journal":{"name":"Journal of Physics: Photonics","volume":"18 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139896355","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}
G. Inzani, N. Di Palo, G. L. Dolso, M. Nisoli, M. Lucchini
{"title":"Absolute delay calibration by analytical fitting of attosecond streaking measurements","authors":"G. Inzani, N. Di Palo, G. L. Dolso, M. Nisoli, M. Lucchini","doi":"10.1088/2515-7647/ad252a","DOIUrl":"https://doi.org/10.1088/2515-7647/ad252a","url":null,"abstract":"\u0000 An accurate temporal characterization of both pump and probe pulses is essential for the correct interpretation of any pump-probe experiment. This is particularly true for attosecond spectroscopy, where the pulses are too short to be directly measured with electronic devices. However, when measuring the absolute timing between a light waveform and the related photoinduced physical phenomenon, such characterization does not suffice. Here, we introduce a new method called rACE (refined Analytical Chirp Evaluation), which retrieves both pump and probe pulses while establishing a direct relation between the reconstructed time axis and the experimental delay. This feature is particularly relevant for the extraction of absolute time delays, a growing field in attosecond spectroscopy. In this work, we prove the robustness of rACE with simulated datasets involving the effect of pulse chirp, distinctive target attributes, and non-isolated attosecond pulses, which normally constitute challenging situations for standard methods. For all the cases reported here, rACE achieves a precise absolute delay calibration with an accuracy better than the atomic unit of time. Its successful application to attosecond experimental measurements makes it a fundamental tool for attaining sub-cycle absolute temporal resolution, enabling new investigations of lightwave-driven ultrafast phenomena.","PeriodicalId":517326,"journal":{"name":"Journal of Physics: Photonics","volume":"21 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139893653","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}
G. Inzani, N. Di Palo, G. L. Dolso, M. Nisoli, M. Lucchini
{"title":"Absolute delay calibration by analytical fitting of attosecond streaking measurements","authors":"G. Inzani, N. Di Palo, G. L. Dolso, M. Nisoli, M. Lucchini","doi":"10.1088/2515-7647/ad252a","DOIUrl":"https://doi.org/10.1088/2515-7647/ad252a","url":null,"abstract":"\u0000 An accurate temporal characterization of both pump and probe pulses is essential for the correct interpretation of any pump-probe experiment. This is particularly true for attosecond spectroscopy, where the pulses are too short to be directly measured with electronic devices. However, when measuring the absolute timing between a light waveform and the related photoinduced physical phenomenon, such characterization does not suffice. Here, we introduce a new method called rACE (refined Analytical Chirp Evaluation), which retrieves both pump and probe pulses while establishing a direct relation between the reconstructed time axis and the experimental delay. This feature is particularly relevant for the extraction of absolute time delays, a growing field in attosecond spectroscopy. In this work, we prove the robustness of rACE with simulated datasets involving the effect of pulse chirp, distinctive target attributes, and non-isolated attosecond pulses, which normally constitute challenging situations for standard methods. For all the cases reported here, rACE achieves a precise absolute delay calibration with an accuracy better than the atomic unit of time. Its successful application to attosecond experimental measurements makes it a fundamental tool for attaining sub-cycle absolute temporal resolution, enabling new investigations of lightwave-driven ultrafast phenomena.","PeriodicalId":517326,"journal":{"name":"Journal of Physics: Photonics","volume":"1 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139897113","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}
Hadi Mahmodi Sheikh Sarmast, C. G. Poulton, Mathew Leslie, Glenn Oldham, Hui Xin Ong, Steven J. Langford, I. Kabakova
{"title":"Principal component analysis in application to brillouin microscopy data","authors":"Hadi Mahmodi Sheikh Sarmast, C. G. Poulton, Mathew Leslie, Glenn Oldham, Hui Xin Ong, Steven J. Langford, I. Kabakova","doi":"10.1088/2515-7647/ad369d","DOIUrl":"https://doi.org/10.1088/2515-7647/ad369d","url":null,"abstract":"\u0000 Brillouin microscopy has recently emerged as a new bio-imaging modality that provides information on the micromechanical properties of biological materials, cells and tissues. The data collected in a typical Brillouin microscopy experiment represents the high-dimensional set of spectral information. Its analysis requires non-trivial approaches due to subtlety in spectral variations as well as spatial and spectral overlaps of measured features. This article offers a guide to the application of Principal Component Analysis (PCA) for processing Brillouin imaging data. Being unsupervised multivariate analysis, PCA is well-suited to tackle processing of complex Brillouin spectra from heterogeneous biological samples with minimal a priori information requirements. We point out the importance of data pre-processing steps in order to improve outcomes of PCA. We also present a strategy where PCA combined with k-means clustering method can provide a working solution to data reconstruction and deeper insights into sample composition, structure and mechanics.","PeriodicalId":517326,"journal":{"name":"Journal of Physics: Photonics","volume":"101 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140511729","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}
T. Cui, Shuang Zhang, A. Alú, M. Wegener, J. Pendry, Jie Luo, Yun Lai, Zuojia Wang, Xiao Lin, Hongsheng Chen, Ping Chen, Rui-Xin Wu, Yuhang Yin, Pengfei Zhao, Huanyang Chen, Yue Li, Ziheng Zhou, N. Engheta, V. Asadchy, Konstantin Simovski, Sergei A. Tretyakov, Biao Yang, S. Campbell, Yang Hao, Douglas H. Werner, Shulin Sun, Lei Zhou, Su Xu, Hong-Bo Sun, Zhou Zhou, Zile Li, Guoxing Zheng, Xianzhong Chen, Tao Li, Shi-Ning Zhu, Junxiao Zhou, Junxiang Zhao, Zhaowei Liu, Yuchao Zhang, Qiming Zhang, Min Gu, Shumin Xiao, Yongmin Liu, Xiaoyu Zhang, Yutao Tang, Guixin Li, T. Zentgraf, K. Koshelev, Yuri S. Kivshar, Xin Li, Trevon Badloe, Lingling Huang, J. Rho, Shuming Wang, Din Ping Tsai, A. Bykov, A. Krasavin, A. Zayats, Cormac McDonnell, T. Ellenbogen, Xiangang Luo, M. Pu, F. García-Vidal, Liangliang Liu, Zhuo Li, Wenxuan Tang, H. Ma, Jingjing Zhang, Yu Luo, Xuanru Zhang, Hao Chi Zhang, P. He, Le Peng Zhang, Xiang Wan, Haotian Wu, Shuo Liu, W. Jiang, X. Zhang, Chengwei Qiu, Qian Ma, Che Liu, Long Li, Jiaqi Han,
{"title":"Roadmap on electromagnetic metamaterials and metasurfaces","authors":"T. Cui, Shuang Zhang, A. Alú, M. Wegener, J. Pendry, Jie Luo, Yun Lai, Zuojia Wang, Xiao Lin, Hongsheng Chen, Ping Chen, Rui-Xin Wu, Yuhang Yin, Pengfei Zhao, Huanyang Chen, Yue Li, Ziheng Zhou, N. Engheta, V. Asadchy, Konstantin Simovski, Sergei A. Tretyakov, Biao Yang, S. Campbell, Yang Hao, Douglas H. Werner, Shulin Sun, Lei Zhou, Su Xu, Hong-Bo Sun, Zhou Zhou, Zile Li, Guoxing Zheng, Xianzhong Chen, Tao Li, Shi-Ning Zhu, Junxiao Zhou, Junxiang Zhao, Zhaowei Liu, Yuchao Zhang, Qiming Zhang, Min Gu, Shumin Xiao, Yongmin Liu, Xiaoyu Zhang, Yutao Tang, Guixin Li, T. Zentgraf, K. Koshelev, Yuri S. Kivshar, Xin Li, Trevon Badloe, Lingling Huang, J. Rho, Shuming Wang, Din Ping Tsai, A. Bykov, A. Krasavin, A. Zayats, Cormac McDonnell, T. Ellenbogen, Xiangang Luo, M. Pu, F. García-Vidal, Liangliang Liu, Zhuo Li, Wenxuan Tang, H. Ma, Jingjing Zhang, Yu Luo, Xuanru Zhang, Hao Chi Zhang, P. He, Le Peng Zhang, Xiang Wan, Haotian Wu, Shuo Liu, W. Jiang, X. Zhang, Chengwei Qiu, Qian Ma, Che Liu, Long Li, Jiaqi Han, ","doi":"10.1088/2515-7647/ad1a3b","DOIUrl":"https://doi.org/10.1088/2515-7647/ad1a3b","url":null,"abstract":"\u0000 Roadmap on Electromagnetic Metamaterials and Metasurfaces","PeriodicalId":517326,"journal":{"name":"Journal of Physics: Photonics","volume":"163 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140514628","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}
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