Optics and Laser Technology最新文献

{"title":"Continuously tunable absorption bands in electromagnetic absorber implemented by a dual phase-transition thermal metamaterial","authors":"Qi Lou ,&nbsp;Minggang Xia","doi":"10.1016/j.optlastec.2025.112943","DOIUrl":"10.1016/j.optlastec.2025.112943","url":null,"abstract":"<div><div>Metamaterial electromagnetic absorbers (MMAs) are emerging as innovative solutions for applications such as radiation detection, electromagnetic stealth, and optoelectronic devices. Traditional MMAs rely on fixed materials and structures to create absorption for given bands, which often leads to invalidations of electromagnetic stealth when the detection bands change. Thus, it is urgent to study and design an electromagnetic absorber with continuously tunable absorption bands, particularly to include intermediate a given band, to adapt to changing detection bands for effective stealth. To overcome this dilemma, we design a graphite-based MMA that incorporates a Ni_1-xFe_xS-VO₂ phase transition thermal concentrator for enhancing electromagnetic absorption at high temperatures and realizing a continuous variation of electromagnetic absorption bands. Although the phase transition leads to abrupt changes in the electromagnetic parameters, the continuous evolution of the phase transition interface makes it possible to manipulate the temperature distribution in the graphite region, thus realizing continuously adjustable electromagnetic absorption bands for MMA. Simulations demonstrate that the phase transition significantly broadens the effective absorption bandwidth (EAB) of the proposed absorber, expanding it from 1.5 GHz to 6.3 GHz. Moreover, the system allows for switching between wideband and narrowband absorption, as well as achieving tunable intermediate absorption bands. This tunability opens new possibilities for active electromagnetic stealth, broadband communication, and sensing functionalities.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112943"},"PeriodicalIF":4.6,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Multiplex biomolecules-sensing: Simulation of an ultrasensitive sensor array for disease diagnosis via two-dimensional photonic crystals","authors":"F. Ouerghi,&nbsp;K. Zahrani,&nbsp;A. Mindil","doi":"10.1016/j.optlastec.2025.112899","DOIUrl":"10.1016/j.optlastec.2025.112899","url":null,"abstract":"<div><div>This work presents promising topologies for a two-dimensional (2D) photonic crystal −based biosensor with multiple detection capabilities. Indeed, our investigation commenced with the simulation of an initial configuration containing a hexagonal lattice of silicon rods in the air, comprising three ring resonators positioned between two waveguides inclined at an angle of 60°. As the diagnostic principle for any disease, the resonant frequency shift of the transmission spectrum of the bottom output port is considered when the analysis samples are inserted into the resonators. Four out of six diseases can be diagnosed by this structure with average sensitivity values. The initial structure undergoes adjustments, resulting in the formation of two distinct structures, each possessing improved sensitivity and the ability to detect three diseases. The first modified biosensor structure exhibited a sensitivity of 2200 nm/RIU in its capability to precisely detect symptoms of dengue fever, HIV, and diabetes. The second modified sensor structure succeeded in achieving a sensitivity of 5095.85 nm/RIU and showed remarkable ability in detecting three distinct forms of cancer: adrenal, blood, and cervical cancer. The simulation was carried out based on the 2D Finite-Difference Time-Domain (FDTD) approach, and the transmission spectra were extracted using MATLAB. Both sensor structures that have been proposed exhibit exceptional sensitivity to give multiple responses, rendering them highly effective and efficient in the field of diagnosis.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112899"},"PeriodicalIF":4.6,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Coherent- and dissipative-coupling control of photonic spin hall effect in cavity magnomechanical system","authors":"Akhtar Munir ,&nbsp;Muqaddar Abbas ,&nbsp;Ziauddin ,&nbsp;Chunfang Wang","doi":"10.1016/j.optlastec.2025.112813","DOIUrl":"10.1016/j.optlastec.2025.112813","url":null,"abstract":"<div><div>Non-Hermitian systems with dissipative magnon–photon coupling present fascinating physics that extends beyond conventional Hermitian systems. We propose a theoretical approach to investigate the photonic spin Hall effect (PSHE) in a non-Hermitian cavity magnomechanical (CMM) system utilizing a yttrium iron garnet (YIG) sphere placed inside the microcavity. Controlling the angular position of the YIG sphere can result in coherent and dissipative magnon–photon coupling. In these coupling instances, we investigate the dynamical manipulation of the PSHE and emphasize the significance of exceptional points (EPs) in enhancing spin-dependent shifts. We utilize the transfer matrix approach to compute the ratio of reflection coefficients for the TE- and TM-components, demonstrating the manipulation of the transverse shift of reflected light from positive to negative around the Brewster angle. Our results demonstrate that the CMM system, particularly in the dissipative coupling instance, has substantially higher PSHE shifts than the CM system, illustrating the impact of both dissipative coupling and the incorporation of a mechanical mode on spin-photonic interactions. Our work sheds light on EP-assisted CMM setups, which open up a novel avenue for dynamically manipulating photonic spin effects with broader implications in spin-based photonic devices.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112813"},"PeriodicalIF":4.6,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Ultrahigh sensitive liquid core fiber Mach–Zehnder interferometer using a low light absorption","authors":"Cheng-Ling Lee ,&nbsp;Jen-Te Chao ,&nbsp;Ying-Zhen Huang ,&nbsp;Yi-Hua Wu ,&nbsp;Yi-Kai Chiu ,&nbsp;Wei-Wei Hsiang","doi":"10.1016/j.optlastec.2025.112919","DOIUrl":"10.1016/j.optlastec.2025.112919","url":null,"abstract":"<div><div>This paper presents an advanced liquid-core fiber Mach–Zehnder interferometer (LCFMZI) designed to have the ultra-low light absorption properties of the liquid core for achieving ultrasensitive spectral responses. The device structure features a micro-sized hollow-core fiber (HCF) with a core diameter of 10 μm, spliced between two single-mode fibers (SMFs) with tilted ends. This configuration minimizes Fresnel reflections and creates a miniature oblique gap for liquid filling. The interference mechanism is based on the superposition of core and cladding modes, with a 5 μm core offset strategically introduced to enhance mode coupling and achieve a high extinction ratio in the output interference spectra. When irradiated by a 980 nm laser diode (LD), the liquid core, serving as an absorber, undergoes a temperature-induced refractive index (RI) change, which alters the optical path difference in the LCFMZI. This results in a substantial wavelength shift in the interference pattern. Experimental results demonstrate remarkable spectral shifts of over 124 nm over the broadband range of 1250–1650 nm with an LD input power as low as 0.566 mW. The proposed LCFMZI achieves an exceptional sensitivity of + 219.08 nm/mW and 3.647 nm/mA with a highly linear response. A theoretical analysis was also performed, demonstrating good agreement with the experimental results. These results validate the effectiveness of the LCFMZI’s low light absorption mechanism in achieving ultrahigh sensitivity.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112919"},"PeriodicalIF":4.6,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 versatile handheld tracking target: Experimental validation of coordinate and surface measurements","authors":"Junkai Duan ,&nbsp;Feifei Gu ,&nbsp;Jize Li ,&nbsp;Jixin Liang ,&nbsp;Zhan Song","doi":"10.1016/j.optlastec.2025.112869","DOIUrl":"10.1016/j.optlastec.2025.112869","url":null,"abstract":"<div><div>In photogrammetry, developing specialized measurement equipment tailored to diverse scenarios and requirements often results in heightened operational complexity and increased costs. To mitigate these challenges, this study introduces a Versatile Handheld Tracking Target (VHT-T) utilizing infrared markers. The VHT-T offers seamless integration with various terminal devices, ensuring a cost-effective and efficient solution for measurement needs. The VHT-T adopts a multi-marker staggered planar constraint structure, and a marker detection and tracking algorithm has been developed to enhance its robustness and adaptability. Experimental results demonstrate that the system achieves stable matching within the range of <span><math><mrow><mo>−</mo><mn>4</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>∘</mo></mrow></msup></mrow></math></span> to <span><math><mrow><mo>+</mo><mn>4</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>∘</mo></mrow></msup></mrow></math></span> when rotating around the X-axis and Y-axis, while maintaining robust matching across the full <span><math><mrow><mn>36</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>∘</mo></mrow></msup></mrow></math></span> range when rotating around the Z-axis. This paper further explores the integration of the VHT-T with two typical terminal devices: (1) when combined with a measurement probe, forming Combined Structure A (CS-A), representing contact-based measurement. For this configuration, a self-calibration algorithm based on rotational spherical constraints and a multi-station tracking method are proposed, achieving handheld coordinate measurement functionality; (2) when combined with a structured light camera, forming Combined Structure B (CS-B), representing non-contact measurement. For this configuration, a self-calibration algorithm based on third-party corner features and a multi-station stitching method are introduced to facilitate handheld surface measurement. These two integration methods provide a feasible reference framework for combining the VHT-T with other terminal devices. Experimental results demonstrate that the VHT-T system can meet tracking requirements in various scenarios for both coordinate and surface measurements, achieving efficient and stable performance.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112869"},"PeriodicalIF":4.6,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Influence of laser texturing parameters on the surface characteristics and cutting performance of cemented carbide tools","authors":"Liang Zhou ,&nbsp;Ping Zou ,&nbsp;Zhenyu Yang ,&nbsp;Boyuan Ren","doi":"10.1016/j.optlastec.2025.112933","DOIUrl":"10.1016/j.optlastec.2025.112933","url":null,"abstract":"<div><div>Surface texturing significantly improves tool performance, while laser texturing is emerging as a preferred technique among texturing methods because of its cost-effectiveness, efficiency, and convenience. A systematic investigation was conducted on the effects of nanosecond laser texturing process parameters on the surface characteristics of cemented carbides, as well as the effects of the rake face texture on the cutting performance. The results demonstrated that the region near the texture exhibited severe oxidation behavior and a decrease in the microhardness. The texture depth increased with both the laser power and scanning number, whereas the texture width tended to increase but then decreased. The excessive pulse frequency and scanning speed prevent the nanosecond laser from ablating a linear texture. A laser power of 8 W, a pulse frequency of 20 kHz, a scanning speed of 800 mm/s, and a scanning number of 10 are suitable nanosecond laser texturing process parameters. Under wet cutting conditions, surface texturing reduces tool wear by 14.5 % and workpiece surface roughness by 30 %. This study provides a significant basis for applying nanosecond lasers to tool surface texturing.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112933"},"PeriodicalIF":4.6,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Hybrid artificial intelligence − enhanced single-shot transport of intensity equation: Algorithms and applications for real-time opto-mechanical characterization of polymeric fibers","authors":"E.Z. Omar ,&nbsp;T.Z.N. Sokkar ,&nbsp;F.E. Al-Tahhan","doi":"10.1016/j.optlastec.2025.112916","DOIUrl":"10.1016/j.optlastec.2025.112916","url":null,"abstract":"<div><div>This study presents a novel approach to optical phase demodulation by combining the Transport of Intensity Equation (TIE) technique with deep learning, enabling real-time characterization of polymeric fibers under mechanical stress. Traditional TIE methods, while effective, require multiple defocused images, limiting their application in dynamic systems. We developed a convolutional neural network architecture that performs phase demodulation using only single focused intensity images, trained on a comprehensive dataset of 672 image sets captured at various wavelengths (550–602 nm). The network achieved remarkable accuracy with a final validation RMS error of 0.0428, demonstrating 99.91 % error reduction during training. The method’s efficacy was validated through in-situ opto-mechanical characterization of polypropylene (PP) fibers under varying draw ratios. Real-time measurements revealed critical insights into the fiber’s structural evolution, including the refractive index and birefringence. Also, this study introduces an innovative AI-enhanced single-shot TIE method integrated with filtered back projection (FBP) algorithm for real-time 3D morphological analysis of PP fibers. The proposed technique enables unprecedented temporal resolution in studying dynamic material behavior, overcoming key limitations of conventional multi-image TIE methods.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Gaussian beam reshaping into flat-top rectangular beam based on two pairs of cylindrical microlens arrays","authors":"Ya-jie Zheng ,&nbsp;Qi Bian ,&nbsp;Feng Yang ,&nbsp;Chen Wang ,&nbsp;Fei Yang ,&nbsp;Huan Wang ,&nbsp;Yong Bo","doi":"10.1016/j.optlastec.2025.112915","DOIUrl":"10.1016/j.optlastec.2025.112915","url":null,"abstract":"<div><div>We propose and demonstrate a new reshaping beam homogenization scheme based on two pairs of cylindrical microlens arrays, which enable the reshaping of a Gaussian circular beam into a uniform flat-top rectangular beam with adjustable size and aspect ratio. Based on the Fourier optics theory, the beam propagation process was analyzed, leading to the establishment of a homogenized light field model. The design parameters of the microlens array system were optimized by using Zemax software. In a proof-of-principle experiment, variant homogenized rectangular spots with customizable aspect ratios can be successfully created, by adjusting the interval between the cylindrical microlens arrays, while the corresponding uniformity remains largely unchanged. This work provides a novel method for generating rectangular intensity distribution with adjustable dimensions. Its spatial flexibility and adaptability are well-suited to the requirements of scientific research and industrial applications.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112915"},"PeriodicalIF":4.6,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"High-precision multi-scale data fusion method for micro-nano CMM and white light interferometer","authors":"Yunlong Liu ,&nbsp;Zhenying Cheng ,&nbsp;Mengting Cheng ,&nbsp;Qiangxian Huang ,&nbsp;Ruijun Li","doi":"10.1016/j.optlastec.2025.112927","DOIUrl":"10.1016/j.optlastec.2025.112927","url":null,"abstract":"<div><div>Evaluating precision machining quality of multi-scale surfaces requires micro-nano instruments combined measurement and point cloud data fusion. Addressing the challenges of registration and fusion difficulties for the micro-nano coordinate measuring machine (micro-nano CMM) and the white light interferometer (WLI) measurement data, a multi-scale data fusion method based on calibrator-aided registration and feature separation method is proposed. The designed triangular frustum calibrator provides reference points and unifies the coordinate systems. Then the WLI measurement point cloud data was separated to form and micro-morphology datasets. The CMM data reconstruction was referred to the form dataset of WLI, and obtained the fusion form dataset. Finally, mapped the micro-morphology dataset onto the fusion form dataset will get the fusion surface dataset. Experimental results show that the RMS and Mean error of the fusion results are less than 1 μm, and this method has higher registration accuracy and fusion quality than ICP and WLSDF methods. Furthermore, the proposed method preserves more detailed micro-morphology, and the data fusion strategy can be used for point cloud registration and data fusion of different micro-nano scale measuring instruments.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112927"},"PeriodicalIF":4.6,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Single-shot incoherent multifunctional image differentiation with spatial tiling optical convolution","authors":"Feng Huang,&nbsp;Guofeng Zhu,&nbsp;Weijie Chang,&nbsp;Cheng Sun,&nbsp;Hewen Wang,&nbsp;BaoLiang Yi,&nbsp;Shengyao Xu","doi":"10.1016/j.optlastec.2025.112926","DOIUrl":"10.1016/j.optlastec.2025.112926","url":null,"abstract":"<div><div>Incoherent optical spatial differentiation may allow high speed, low computational power and low latency image processing. However, it is a great challenge to directly design an optical convolutional kernel containing negative values for image differentiation. Therefore, polarization or wavelength-multiplexed bipolar point spread functions (PSFs) followed by digital subtraction is proposed to achieve incoherent optical edge detection. Unfortunately, these methods will increase the device design complexity and only support single isotropic edge detection. Here we proposed and experimentally demonstrated a single-shot incoherent multifunctional image differentiation with spatial tiling optical convolution. As a proof of concept, we specially designed four spatial tiling non-negative optical convolutional kernels based on 4<em>f</em> system through inverse design method, and simultaneously realized three types of spatial differential operators. The x and y directions spatial differentiation and isotropic edge detection can be experimentally demonstrated simultaneously after digital subtraction. Our solution is capable of relaxing device complexity, increasing scalability and facilitating intelligent design, which is of great significance for accelerating machine vision tasks under incoherent illumination.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"188 ","pages":"Article 112926"},"PeriodicalIF":4.6,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}