Journal of the European Optical Society-Rapid Publications最新文献

{"title":"Stimulated Raman scattering simulation for imaging optimization","authors":"Liron Zada,&nbsp;Bart Fokker,&nbsp;Heather A. Leslie,&nbsp;A. Dick Vethaak,&nbsp;Johannes F. de Boer,&nbsp;Freek Ariese","doi":"10.1186/s41476-021-00155-w","DOIUrl":"https://doi.org/10.1186/s41476-021-00155-w","url":null,"abstract":"<p>Two simulation programs of a stimulated Raman scattering microscopy (SRS) imaging system with lock-in amplifier (LIA) detection were developed. SRS is an imaging technique based on the vibrational Raman cross-section as the contrast mechanism and enables fast, label-free imaging. Most SRS implementations are based on LIA detection of a modulated signal. However, building and operating such SRS set-ups still poses a challenge when selecting the LIA parameter settings for optimized acquisition speed or image quality. Moreover, the type of sample, e.g. a sparse sample vs. a densely packed sample, the required resolution as well as the Raman cross-section and the laser powers affect the parameter choice.</p><p>A simulation program was used to find these optimal parameters. The focal spot diameters of the individual lasers (pump and Stokes) were used to estimate the effective SRS signal focal spot and the (optical) spatial resolution. By calibrating the signal and noise propagation through an SRS system for a known molecule, we estimated the signal and noise input to the LIA. We used a low pass filter model to simulate the LIA behavior in order to find the optimal parameters (i.e. filter order and time constant).</p><p>Optimization was done for either image quality (expressed as contrast to noise ratio) or acquisition time. The targeted object size was first determined as a measure for the required resolution. The simulation output consisted of the LIA parameters, pixel dwell time and contrast to noise ratio.</p><p>In a second simulation we evaluated SRS imaging based on the same principles as the optimal setting simulation, i.e. the signals were propagated through an imaging system and LIA detection. The simulated images were compared to experimental SRS images of polystyrene beads.</p><p>Finally, the same software was used to simulate multiplexed SRS imaging. In this study we modeled a six-channel frequency-encoded multiplexed SRS system demodulated with six LIA channels. We evaluated the inter-channel crosstalk as a function of chosen LIA parameters, which in multiplex SRS imaging also needs to be considered.</p><p>These programs to optimize the contrast to noise ratio, acquisition speed, resolution and crosstalk will be useful for operating stimulated Raman scattering imaging setup, as well as for designing novel setups.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00155-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Quantum dash multi-wavelength lasers for Tbit/s coherent communications and 5G wireless networks","authors":"Zhenguo Lu,&nbsp;Jiaren Liu,&nbsp;Youxin Mao,&nbsp;Khan Zeb,&nbsp;Guocheng Liu,&nbsp;Philip J. Poole,&nbsp;John Weber,&nbsp;Mohamed Rahim,&nbsp;Grzegorz Pakulski,&nbsp;Chunying Song,&nbsp;Martin Vachon,&nbsp;Pedro Barrios,&nbsp;Daniel Poitras,&nbsp;Shurui Wang,&nbsp;Weihong Jiang","doi":"10.1186/s41476-021-00156-9","DOIUrl":"https://doi.org/10.1186/s41476-021-00156-9","url":null,"abstract":"<p>We report on the design, growth, fabrication, and performance of InAs/InP quantum dash (QD) multi-wavelength lasers (MWLs) developed by the National Research Council (NRC) Canada. The key technical specifications investigated include optical and RF beating spectra, relative intensity noise (RIN), and optical phase noise of each individual wavelength channel. Data bandwidth transmission capacity of 5.376 Tbit/s and 10.8 Tbit/s respectively in the PAM-4 and 16-QAM modulation formats are demonstrated using only a single C-band QD 34.2-GHz MWL chip. We have also developed a monolithic InAs/InP QD dual-wavelength (DW) DFB laser as a compact optical beat source to generate millimeter-wave (MMW) signals. Due to the common cavity, highly coherent and correlated optical modes with optical linewidth as low as 15.83?kHz, spectrally pure MMW signals around 46.8?GHz with a linewidth down to 26.1?kHz were experimentally demonstrated. By using this QD DW-DFB laser, a one GBaud (2 Gbps) MMW over-fiber transmission link is demonstrated with PAM-4 signals. The results show that the demonstrated device is suitable for high speed high capacity MMW fiber-wireless integrated fronthaul of 5G networks.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00156-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4545910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"A new route for caesium lead halide perovskite deposition","authors":"Naomi Falsini,&nbsp;Andrea Ristori,&nbsp;Francesco Biccari,&nbsp;Nicola Calisi,&nbsp;Giammarco Roini,&nbsp;Paolo Scardi,&nbsp;Stefano Caporali,&nbsp;Anna Vinattieri","doi":"10.1186/s41476-021-00153-y","DOIUrl":"https://doi.org/10.1186/s41476-021-00153-y","url":null,"abstract":"<p>Inorganic metal halide perovskites are relevant semiconductors for optoelectronic devices. The successful deposition of thin films of CsPbBr₃ and CsPbCl₃ has recently been obtained by Radio-Frequency magnetron sputtering. In this work we compare the morphological, structural and optical characteristics of the two materials obtained with this deposition technique. A detailed photoluminescence (PL) spectroscopy study of the as-grown samples was conducted at the macro and micro scale in a wide temperature range (10-300 K) to fully characterize the PL on sample areas of square centimeters, to assess the origin of the inhomogeneous broadening and to quantify the PL quantum yield quenching. Our results prove that this technique allows for the realization of high quality nanometric films with controlled thickness of relevance for optoelectronic applications.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00153-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4088319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Raman spectroscopic detection of interleukin-10 and angiotensin converting enzyme","authors":"Shuo Zhang,&nbsp;Frederieke A. M. van der Mee,&nbsp;Roel J. Erckens,&nbsp;Carroll A. B. Webers,&nbsp;Tos T. J. M. Berendschot","doi":"10.1186/s41476-021-00152-z","DOIUrl":"https://doi.org/10.1186/s41476-021-00152-z","url":null,"abstract":"<p>In this report we present a confocal Raman system to identify the unique spectral features of two proteins, Interleukin-10 and Angiotensin Converting Enzyme. Characteristic Raman spectra were successfully acquired and identified for the first time to our knowledge, showing the potential of Raman spectroscopy as a non-invasive investigation tool for biomedical applications.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00152-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4779305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Fabrication of perfect plasmonic absorbers for blue and near-ultraviolet lights using double-layer wire-grid structures","authors":"Atsushi Motogaito,&nbsp;Ryoga Tanaka,&nbsp;Kazumasa Hiramatsu","doi":"10.1186/s41476-021-00151-0","DOIUrl":"https://doi.org/10.1186/s41476-021-00151-0","url":null,"abstract":"<p>This study proposes using double-layer wire-grid structures to create narrow-band, perfect plasmonic absorbers, which depend on polarization, for the short-wavelength visible and near-ultraviolet regions of the electromagnetic spectrum. A rigorous coupled-wave analysis reveals that the maximum absorption attained using Ag and Al is ~?90% at 450 and 375?nm. Experiments using Ag yielded results similar to those predicted by simulations. These results demonstrate that narrow-band perfect plasmonic absorbers, which depend on the polarization, can be realized at 450 and 375?nm using Ag or Al.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00151-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4779306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Transient dynamical-thermal-optical system modeling and simulation","authors":"Luzia Hahn,&nbsp;Peter Eberhard","doi":"10.1186/s41476-021-00150-1","DOIUrl":"https://doi.org/10.1186/s41476-021-00150-1","url":null,"abstract":"<p>In modern high resolution optical systems like astronomical telescopes or lithographic objectives, performance degradations can be caused by various disturbances. Holistic optical system simulation is required to predict the performance or the high precision systems. In this paper a method for transient dynamical-thermal-optical system modeling and simulation is introduced. Thereby, elastic deformation, rigid body motion, and mechanical stresses due to dynamical excitation are calculated using elastic multibody system simulation and temperature changes are determined using thermal finite element analysis. The deformation, the motion, and the mechanically and thermally induced stress index changes are then considered in a gradient-index ray tracing. Finally, the presented method is applied in a dynamical-thermal single lens system.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00150-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4237711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Nano-imprinted subwavelength gratings as polarizing beamsplitters","authors":"Julian Wüster,&nbsp;Yannick Bourgin,&nbsp;Patrick Feßer,&nbsp;Arne Behrens,&nbsp;Stefan Sinzinger","doi":"10.1186/s41476-021-00149-8","DOIUrl":"https://doi.org/10.1186/s41476-021-00149-8","url":null,"abstract":"<p>Polarizing beamsplitters have numerous applications in optical systems, such as systems for freeform surface metrology. They are classically manufactured from birefringent materials or with stacks of dielectric coatings. We present a binary subwavelength-structured form-birefringent diffraction grating, which acts as a polarizing beamsplitter for a wide range of incidence angles ?30^°…+30^°. We refine the general design method for such hybrid gratings. We furthermore demonstrate the manufacturing steps with Soft-UV-Nanoimprint-Lithography, as well as the experimental verification, that the structure reliably acts as a polarizing beamsplitter. The experimental results show a contrast in efficiency for TE- and TM-polarization of up to 1:18 in the first order, and 34:1 in the zeroth order. The grating potentially enables us to realize integrated compact optical measurement systems, such as common-path interferometers.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00149-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4943533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Crystallization behavior of ion beam sputtered HfO2 thin films and its effect on the laser-induced damage threshold","authors":"Zoltán Balogh-Michels,&nbsp;Igor Stevanovic,&nbsp;Aurelio Borzi,&nbsp;Andreas Bächli,&nbsp;Daniel Schachtler,&nbsp;Thomas Gischkat,&nbsp;Antonia Neels,&nbsp;Alexander Stuck,&nbsp;Roelene Botha","doi":"10.1186/s41476-021-00147-w","DOIUrl":"https://doi.org/10.1186/s41476-021-00147-w","url":null,"abstract":"<p>In this work, we present our results about the thermal crystallization of ion beam sputtered hafnia on 0001 SiO₂ substrates and its effect on the laser-induced damage threshold (LIDT). The crystallization process was studied using in-situ X-ray diffractometry. We determined an activation energy for crystallization of 2.6?±?0.5?eV. It was found that the growth of the crystallites follows a two-dimensional growth mode. This, in combination with the high activation energy, leads to an apparent layer thickness-dependent crystallization temperature. LIDT measurements @355?nm on thermally treated 3 quarter-wave thick hafnia layers show a decrement of the 0% LIDT for 1?h @773?K treatment. Thermal treatment for 5?h leads to a significant increment of the LIDT values.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00147-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4262138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Correction to: Design of high performance and low resistive loss graphene solar cells","authors":"Kourosh Rezaei,&nbsp;Mohammad Sabaeian,&nbsp;Yaser Hajati","doi":"10.1186/s41476-021-00146-x","DOIUrl":"https://doi.org/10.1186/s41476-021-00146-x","url":null,"abstract":"","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-021-00146-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5085586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Improvement of the optical properties after surface error correction of aluminium mirror surfaces","authors":"M. Ulitschka,&nbsp;J. Bauer,&nbsp;F. Frost,&nbsp;T. Arnold","doi":"10.1186/s41476-020-00143-6","DOIUrl":"https://doi.org/10.1186/s41476-020-00143-6","url":null,"abstract":"<p>Ion beam finishing techniques of aluminium mirrors have a high potential to meet the increasing demands on applications of high-performance mirror devices for visible and ultraviolet spectral range. Reactively driven ion beam machining using oxygen and nitrogen gases enables the direct figure error correction up to 1?μm machining depth while preserving the initial roughness. However, the periodic turning mark structures, which result from preliminary device shaping by single-point diamond turning, often limit the applicability of mirror surfaces in the short-periodic spectral range. Ion beam planarization with the aid of a sacrificial layer is a promising process route for surface smoothing, resulting in successfully reduction of the turning mark structures. A combination with direct surface smoothing to perform a subsequent improvement of the microroughness is presented with a special focus on roughness evolution, chemical composition, and optical surface properties. As a result, an ion beam based process route is suggested, which allows almost to recover the reflective properties and an increased long-term stability of smoothed aluminium surfaces.</p>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s41476-020-00143-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4160752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}