Optical ReviewPub Date : 2023-08-05DOI: 10.1007/s10043-023-00830-y
Yoshito Onishi, Yoshiho Seo, Masaoki Matsuoka, Shigeru Serikawa, Ken Tsugane
{"title":"Establishment of method distinguishing between defects and artificial texture in defect inspection with phase-shift illumination method","authors":"Yoshito Onishi, Yoshiho Seo, Masaoki Matsuoka, Shigeru Serikawa, Ken Tsugane","doi":"10.1007/s10043-023-00830-y","DOIUrl":"10.1007/s10043-023-00830-y","url":null,"abstract":"<div><p>Inspection systems with a machine vision camera have been extensively applied in factory automation detecting unclear defects. In this automatic inspection, optical engineering technology needs to emphasize the contrast of defects in order to quickly find them in a camera image and improve image recognition accuracy. Using the phase-shift illumination method with striped structured illumination, we develop optical engineering and image processing technology to enhance defects in transparent materials. Our challenge has been to distinguish actual defects from dark fringes due to artificial three-dimensional texture on a target sample. We proposed theoretically that an innovative method providing an illumination pattern with finite-width dark regions would make the gentler slope of artificial texture less visible than actual defects. We extended our theoretical model in the case of a square wave as the typical illumination pattern and established an inspection method distinguishing defects from artificial texture. We confirmed with simulations and experiments that the square-wave illumination enables us to distinguish between defects and artificial texture.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084075","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}
Optical ReviewPub Date : 2023-08-04DOI: 10.1007/s10043-023-00832-w
Wanlu Bian, Fengcai Ma, Yurui Fang
{"title":"Circular dichroism analysis of half-roll plasmonic chiral nanostructures","authors":"Wanlu Bian, Fengcai Ma, Yurui Fang","doi":"10.1007/s10043-023-00832-w","DOIUrl":"10.1007/s10043-023-00832-w","url":null,"abstract":"<div><p>Surface-plasmon-enhanced circular dichroism (CD) spectroscopy is a powerful analytical technique used for detecting chiral molecules, with great potential in biomedical diagnosis and pathogen detection. This work focuses on understanding the physical mechanisms of CD production and developing high-sensitivity CD detection substrates. Numerical simulation of the finite difference time domain (FDTD) method is utilized to design and study half-roll plasmonic nanostructures. The scattering spectra of the structure and the corresponding CD spectra show two resonance peaks, λ<sub>1</sub> = 691 nm and λ<sub>2</sub> = 903 nm, where the charge distribution of the upper surface and the lower surface shows a quadrupole distribution and a dipole distribution, and both of them are in antibonding mode. The structure’s sensitivity is demonstrated by varying the structure parameters and surrounding medium environment, which provides valuable insights for designing optical devices.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41084031","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}
Optical ReviewPub Date : 2023-07-12DOI: 10.1007/s10043-023-00827-7
Xiaoman Luo, Jinhua Li, Yuan Ma, Youqiao Ma
{"title":"Design of efficient coupling configuration with L-shaped plasmoic waveguide and nanoantenna","authors":"Xiaoman Luo, Jinhua Li, Yuan Ma, Youqiao Ma","doi":"10.1007/s10043-023-00827-7","DOIUrl":"10.1007/s10043-023-00827-7","url":null,"abstract":"<div><p>A novel design for an efficient coupling configuration, which consists of a L-shaped dielectric loaded surface plasmon polaritons (DLSPPs) waveguide and L-shaped nanoantenna, is proposed and investigated numerically in this paper. We carried out the theoretical analysis for the coupling characteristics by utilizing the finite-difference time-domain (FDTD) method. The factors affecting the coupling efficiency of light from free space to the proposed structure were studied in detail, including the structural parameters and incident light source. The simulation results reveal that the coupling performance of proposed structure with optimized geometric parameters is at least three times enhanced compared to that of a single straight DLSPPs waveguide when the incident light is polarized perpendicular to DLSPPs waveguide at a wavelength of λ?=?532?nm. The proposed configuration, which is simple and easy to fabricate, can not only achieve the subwavelength mode confinement but also possesses a relatively high coupling efficiency, thus may potentially be used in nano-photonic coupling circuits and nano-optical manipulation.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10043-023-00827-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4500002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Optical ReviewPub Date : 2023-07-05DOI: 10.1007/s10043-023-00826-8
Zhongyang Li, Lulu Yang, Kaiwu Wang, Chenxu Shi, Zhiliang Chen, Juan Xu, Pibin Bing, Anfu Zhu, Degang Xu, Kai Zhong, Jianquan Yao
{"title":"Terahertz optical frequency comb generation with optimized cascaded difference frequency generation","authors":"Zhongyang Li, Lulu Yang, Kaiwu Wang, Chenxu Shi, Zhiliang Chen, Juan Xu, Pibin Bing, Anfu Zhu, Degang Xu, Kai Zhong, Jianquan Yao","doi":"10.1007/s10043-023-00826-8","DOIUrl":"10.1007/s10043-023-00826-8","url":null,"abstract":"<div><p>A novel scheme that generates terahertz optical frequency comb (THz OFC) based on optimized cascaded difference frequency generation (OCDFG) with an aperiodically poled lithium niobate (APPLN) crystal is proposed. Two pump lasers initially generate cascaded optical waves by cascaded difference frequency generation (CDFG), the n multiple-frequency THz waves are generated by mixing cascaded optical waves, and finally THz OFC is formed by optimizing phase mismatches of CDFG along the APPLN crystal length. High-performance THz OFC with characteristics of high repetition rate, tunable repetition rate, high flatness and tunable spectral distribution range is exhibited by providing a theoretical calculation. We argue that the scheme based on OCDFG is promising for achieving high-performance THz OFC.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4548471","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}
Optical ReviewPub Date : 2023-06-24DOI: 10.1007/s10043-023-00825-9
Ze-Bo Wu, Wei Tao, Na Lv, Hui Zhao
{"title":"Self-correction of fringe order jump error induced by system nonlinearity based on phase-coding method","authors":"Ze-Bo Wu, Wei Tao, Na Lv, Hui Zhao","doi":"10.1007/s10043-023-00825-9","DOIUrl":"10.1007/s10043-023-00825-9","url":null,"abstract":"<div><p>Temporal phase unwrapping based on phase-encoding is a technique widely used in 3D measurement for its high-speed advantage. However, eliminating fringe order jump error induced by the system’s luminance nonlinearity is still a key challenge. We propose a fringe order jump error self-correction method to address this issue. First, we encode the shifting phase and stair phase separately and combine them into the same pattern based on four-step phase shifting. This allows us to calculate the fringe order and wrapped phase simultaneously and avoid the overlapping of two set phases. Then, we add auxiliary patterns to obtain information on the order-located period’s odd-evenness characteristic. Theoretically, we demonstrate that under the influence of the nonlinear effect, the order calculation value for a particular period fluctuates between the ideal values of two adjacent orders. Thus, the correct order value can be directly determined by acquiring the period characteristic information, without the need for complex error compensation. Simulations demonstrate that the method performs good robustness where random noise and luminance saturation exist simultaneously in addition to system nonlinearity. Our experiments confirm the effectiveness of this method for high-accurate and fast fringe order determination.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4938324","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}
Optical ReviewPub Date : 2023-06-16DOI: 10.1007/s10043-023-00822-y
Zahraa S. Khaleel, A. Mudhafer
{"title":"Machine learning-based classification for predicting the power flow of surface plasmon polaritons in nanoplasmonic coupler","authors":"Zahraa S. Khaleel, A. Mudhafer","doi":"10.1007/s10043-023-00822-y","DOIUrl":"10.1007/s10043-023-00822-y","url":null,"abstract":"<div><p>Using a combination of the finite element method (FEM) applied in COMSOL Multiphysics and the machine learning (ML)-based classification models, a computational tool has been developed to predict the appropriate amount of power flow in a plasmonic structure. As a plasmonic coupler, a proposed structure formed of an annular configuration with teeth-shaped internal corrugations and a center nanowire is presented. The following representative data mining techniques: standalone J48 decision tree, support vector machine (SVM), Hoeffding tree, and Naïve Bayes are systematically used. First, a FEM is used to obtain power flow data by taking into consideration a geometrical dimensions, involving a nanowire radius, tooth profile, and nanoslit width. Then, we use them as inputs to learn about machine how to predicate the appropriate power flow without needing FEM of COMSOL, this will reduce financial consumption, time and effort. Therefore, we will determine the optimum approach for predicting the power flow of the proposed structure in this work based on the confusion matrix. It is envisaged that these predictions’ results will be important for future optoelectronic devices for extraordinary optical transmission (EOT).</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10043-023-00822-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4653859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Optical ReviewPub Date : 2023-06-12DOI: 10.1007/s10043-023-00824-w
Masatoshi Bunsen, Taishi Miwa
{"title":"Correction to: Generation of amplitude- and phase-modulated signal beam with a phase-only spatial light modulator and its detection by the transport of intensity equation method for holographic data storage","authors":"Masatoshi Bunsen, Taishi Miwa","doi":"10.1007/s10043-023-00824-w","DOIUrl":"10.1007/s10043-023-00824-w","url":null,"abstract":"","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4498403","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}
Optical ReviewPub Date : 2023-06-08DOI: 10.1007/s10043-023-00819-7
Jun Igarashi, Hironori Ito, Satoshi Honma
{"title":"Batch recording of multiple SQAM signal and self-reference detection technique","authors":"Jun Igarashi, Hironori Ito, Satoshi Honma","doi":"10.1007/s10043-023-00819-7","DOIUrl":"10.1007/s10043-023-00819-7","url":null,"abstract":"<div><p>The development of holographic data storage is expected as a next-generation large-capacity memory. The recording scheme of spatial quadrature amplitude modulated (SQAM) signal, whose amplitude and phase are individually modulated with multi-levels, is a promising technique to improve the recording density of the memory. In this paper, we propose a method to simultaneously record multiple SQAM signals with different angles in the holographic memory. We also propose a method to detect the amplitude and phase value of the SQAM signal from the interference intensity distribution formed by the two SQAM signals selectively reproduced from the memory. We evaluate the decoding accuracy when the multiple SQAM signals generated by the interleaved phase method are recorded and the two signals are extracted and readout numerically. We also give experimental result as proof of principle of the decoding process. In the end, we analyze the accuracy against multiple number of SQAM signals on a recording page.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4348732","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}
Optical ReviewPub Date : 2023-06-05DOI: 10.1007/s10043-023-00823-x
Susheel Kumar Singh, Akash Srivastava, L. K. Dwivedi, Sunil. P. Singh
{"title":"Detection of biological contamination protozoa in drinking water using surface plasmon resonance-based technique","authors":"Susheel Kumar Singh, Akash Srivastava, L. K. Dwivedi, Sunil. P. Singh","doi":"10.1007/s10043-023-00823-x","DOIUrl":"10.1007/s10043-023-00823-x","url":null,"abstract":"<div><p>Water is one of the fundamental needs for human life on earth. Different kinds of contaminants that exist in the drinking water may cause serious health issues, affect body organs, or may cause mortality. One of the main sources of biological contaminants in the water is protozoan parasites, which are normally transmitted through the oral-fecal route. Two frequently water born protozoan parasites are <i>C. parvum</i> and <i>G. lamblia</i>. Both of these parasites have different values of refractive index and size. Using these biophysical parameters, the new detection system may be developed for real-time and on-site measurement. In this paper surface plasmon resonance (SPR) technique is utilized for theoretical investigation of biological contamination protozoa in drinking. Based on angle interrogation, the Kretschmann configuration is used to elaborate the concept of the setup. The performance is analysed on the basis of incident light wavelength in visible region and radiative properties of a multi-layered structure are studied using the transfer Metrix method.</p></div>","PeriodicalId":722,"journal":{"name":"Optical Review","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4550721","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}