Article
Materials Science, Multidisciplinary
Nianyao Chai, Yanan Liu, Yunfan Yue, Ping Wei, Xuewen Wang, Junjie Zhao, Qi Zhang, Fuzhi Huang, Zhongle Zeng, Zongsong Gan, Liqiang Mai, Yibing Cheng
Summary: Using preceramic monomers polymerized under ultrafast laser irradiation, complex and arbitrary 3D preceramic polymer structures can be formed. After calcination treatment, these green-body structures can be converted into pure high-dense SnO2 ceramics with feature sizes down to submicron.
SCIENCE CHINA-MATERIALS
(2021)
Article
Optics
Stanislas Grare
Summary: This study presents a low-cost self-referencing digital holography microscope using a Blu-Ray pickup and a Raspberry-Pi computer. The setup is compact and allows for control of hardware components and reconstruction of holograms. The microscope's magnification was estimated and it was successfully tested on microspheres and red blood cells.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Biophysics
Shahrzad Forouzanfar, Nezih Pala, Marc Madou, Chunlei Wang
Summary: The review provides an overview of the progress, fabrication processes, technical challenges, and opportunities of C-MEMS and C-NEMS technologies in biotech applications, as well as outlooks for future developments.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Nanoscience & Nanotechnology
Minsu Kang, Jin Heesoo, Heonsu Jeon
Summary: Projection photolithography using extreme-ultraviolet light source is crucial for fabricating nanoscale patterns for electronic chips, but not necessary for photonics. A cost-effective and high-throughput lithographic technique for submicron pattern generation is in high demand. The maskless digital photolithography (MDPL) technique has shown promise in addressing this demand and has been successfully used to fabricate submicron periodicity photonic crystal patterns.
Article
Multidisciplinary Sciences
Christopher H. Dreimol, Huizhang Guo, Maximilian Ritter, Tobias Keplinger, Yong Ding, Roman Gunther, Erik Poloni, Ingo Burgert, Guido Panzarasa
Summary: The authors introduce an innovative approach called iron-catalyzed laser-induced graphitization (IC-LIG) for engraving large-scale electrically conductive structures on wood with high quality and efficiency. This method overcomes the limitations of conventional techniques and can be done in ambient atmosphere with a single step.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Xuewen Wang, Jianlei Cui, Hailong Yin, Zhijun Wang, Xiaoqiao He, Xuesong Mei
Summary: This paper investigates the mechanism of nanostructure fabrication on Au and Ag nano-film using a laser illuminating a cantilevered scanning near-field optical microscopy (SNOM) tip. The results reveal that the laser is restricted and enhanced within the SNOM tip aperture during illumination, and locally excited surface plasmon polaritons play a significant role in nanostructure fabrication. The effects of several parameters on the substrate surface temperature during fabrication are also studied.
Article
Chemistry, Multidisciplinary
Philipp Taus, Adrian Prinz, Heinz D. Wanzenboeck, Patrick Schuller, Anton Tsenov, Markus Schinnerl, Mostafa M. Shawrav, Michael Haslinger, Michael Muehlberger
Summary: This study demonstrates different approaches for generating sophisticated undercut T-shaped masters suitable for nanoimprint lithography, successfully fabricating single-layer and multilayer undercut T-shaped structures, which can be applied to replicate structural colors on artificial surfaces in the future.
Article
Chemistry, Analytical
Hee Soo Jeong, Seoyoung Hwang, Kyou Sik Min, Sang Beom Jun
Summary: Microelectrode arrays (MEAs) have been a powerful tool for monitoring neural activity over time. The study proposed a simple fabrication method using laser-patterned indium tin oxide (ITO) conductors and SU-8 photoresist insulation. The fabricated MEAs showed similar results to conventional MEAs and are cost-effective.
Article
Materials Science, Multidisciplinary
Quentin Kirscher, Samar Hajjar-Garreau, Fabien Grasset, Dominique Berling, Olivier Soppera
Summary: Micro- and nanopatterning of metal oxide materials is crucial for the development of electronic or optoelectronic devices. This study focuses on the direct writing laser patterning in the Deep-UV (DUV) range to create photoluminescent microstructures of ZnO at room temperature. By synthesizing colloidal ZnO nanocrystals (NCs) with carefully selected ligands, the process ensures stability of the colloids, redissolution of non-insolated parts, and cross-linking of DUV-insolated parts. This room temperature process preserves the photoluminescence properties of the NCs and offers a sub-micrometer resolution for the integration of microstructures on flexible substrates for optoelectronic applications.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ruyi Liu, Chuanhao Liu, Caixia Fu, Zhenzhen Zhu, Kuan Chen, Chuan Li, Lingjie Wang, Yan Huang, Zhiyun Lu
Summary: This study presents a solution to the limited availability of purely organic compounds with ambient phosphorescence. By constructing an ortho-linked donor-acceptor dyad, the researchers achieved long lifetime and high efficiency phosphorescence in different matrix. The new phosphor OF-BCz showed promising potential as a photocuring initiator and quality indicator in photolithographic patterning.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Anton E. E. Egorov, Alexey A. A. Kostyukov, Denis A. A. Shcherbakov, Danila A. A. Kolymagin, Dmytro A. A. Chubich, Rilond P. P. Matital, Maxim V. V. Arsenyev, Ivan D. D. Burtsev, Mikhail G. G. Mestergazi, Elnara R. R. Zhiganshina, Sergey A. A. Chesnokov, Alexei G. G. Vitukhnovsky, Vladimir A. A. Kuzmin
Summary: Micron- and submicron-scale 3D structure realization is now possible through two-photon photopolymerization (TPP) direct laser writing photolithography (DLW photolithography) method. To fabricate micro-optical elements with high curvature values, including X-ray microlenses, lithographic features with dimensions less than 100 nm are in demand. A photoinitiator (PI) based on a methyl methacrylate derivative of 2,5-bis(4-(dimethylamino)benzylidene) cyclopentanone was studied spectroscopically and photochemically. The enhanced intersystem crossing in the methyl methacrylate derivative leads to increased radical generation for polymerization initiation. A comprehensive study was conducted on the new photocompositions, focusing on photochemical constants, photopolymerization degree, and topology. Optimal parameters for mechanically stable structure fabrication were determined, including threshold dose parameters for lithography and sub-100 nm feature fabrication. X-ray lens microstructures were also successfully fabricated.
Article
Optics
Xuewen Wang, Jianlei Cui, Hailong Yin, Zhijun Wang, Xiaoqiao He, Xuesong Mei
Summary: In this paper, the mechanism of nanopatterning on noble metal nano-films by laser irradiating cantilevered scanning near-field optical microscopy (SNOM) probe is investigated. The main mechanism of this phenomenon is proposed to be the melt and reshaping of the nano-film under the SNOM tip, caused by the surface plasmon polariton-assisted enhancement and restriction within the SNOM tip aperture. The impacts of the gap g between the tip and substrate and the polarization of the laser are further analyzed.
Article
Optics
Zhong Wang, Weihua Zhang
Summary: The study demonstrates that the sub-micrometer Si hemispherical nanolens has excellent focusing capabilities at 405 nm wavelength, offering a low-cost alternative in the field of super-resolution photolithography and optical microscopy.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Yong-Sin Syu, Yung-Chun Lee
Summary: This study introduces an analytical collimating lens design method, which effectively optimizes the divergent angles of UV LEDs and is suitable for mass production.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Konstantinos Kallitsis, Damien Thuau, Cyril Brochon, Eric Cloutet, Georges Hadziioannou
Summary: Fluorinated electroactive polymers (FEPs) are emerging as important insulating materials in organic electronic devices, but their fixed electronic properties are difficult to adjust. This review discusses the need for adjusting the electronic properties of FEPs and proposes different solutions, such as stabilizing dielectric properties and compatibility with photolithography.
COLLOID AND POLYMER SCIENCE
(2021)
Article
Optics
Yin Xiao, Lina Zhou, Wen Chen
Summary: This paper introduces a correspondence imaging approach for reconstructing high-quality objects through complex scattering media. By deriving a rectified theory and introducing temporal correction, the proposed method eliminates the effect of dynamic scaling factors. Experimental results demonstrate the advantages of the proposed method over conventional methods in complex scattering environments, and it can also be combined with other methods to further enhance the quality of reconstructed objects.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Zengxuan Jiang, Minghao Chao, Qingsong Liu, Bo Cheng, Guofeng Song, Jietao Liu
Summary: In this paper, a multi-focal metalens with high focusing efficiency controlled by circular polarization multiplexing is demonstrated. The metalens can generate four transversely distributed focal points under normal incidence of linearly polarized light, supporting both left-circularly polarized and right-circularly polarized conversion. Furthermore, an oblique incidence metalens is designed to achieve high total focusing efficiency for terahertz waves and provides potential new applications for polarization imaging and detection.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Yiran Wang, Yu Ji, Xuyang Zhou, Xiu Wen, Yutong Li, Zhengjun Liu, Shutian Liu
Summary: This work presents a new reconstruction framework for structured illumination microscopy (SIM), which only requires four raw images and avoids extensive iterative computation. By using checkerboard pattern illumination modulation instead of sinusoidal fringe illumination, the proposed method significantly reduces image acquisition time and achieves higher image reconstruction rate. Additionally, the reconstruction process is non-iterative and not limited by the field of view size.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Qian He, Li Pei, Jianshuai Wang, Jingjing Zheng, Tigang Ning, Jing Li
Summary: This paper proposes a 3D refractive index profile visualization method to demonstrate mode activation and evolution in fiber fusion splicing. The method is validated through experimental results and provides support for various fiber splicing operations and mode coupling modulation.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Qiwei Li, Qiyu Wang, Fang Lu, Yang Cao, Xu Zhao
Summary: LSHIP is a lenslet-array-based snapshot hyperspectral imaging polarimeter that combines spectral polarization modulation with integral field imaging spectrometry. It can simultaneously acquire three-dimensional spatial and spectral data-cubes for linear Stokes parameters in a single snapshot.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Huicong Li, Bing Lv, Meng Tian, Wenzhu Huang, Wentao Zhang
Summary: This study proposes a temperature compensation scheme for unbalanced interferometers using sensing fibers with different temperature coefficients, aiming to resolve the temperature disturbance and achieve high strain resolution. The experimental results confirm the effectiveness of the proposed scheme in high-resolution, long-term, low-frequency, and static strain sensing.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Hongxiang Chang, Rongtao Su, Yuqiu Zhang, Bowang Shu, Jinhu Long, Jinyong Leng, Pu Zhou
Summary: High-speed variable-focus optics provides new opportunities for fiber laser applications in various fields. This paper investigates a non-mechanical axial focus tuning method using coherent beam combining (CBC) technique and proposes a tilt modulation assisted method to extend the tuning range.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Yubo Ni, Shuai Fu, Chaoyang Su, Zhaozong Meng, Nan Gao, Zonghua Zhang
Summary: This paper proposes a surface adaptive fringe pattern generation method to accurately measure specular surfaces, eliminating the out-of-focus effect and improving measurement accuracy and reliability.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Zifan Wang, Tianfeng Zhou, Qian Yu, Zihao Zeng, Xibin Wang, Junjian Hu, Jiyong Zeng
Summary: Fast-axis collimation (FAC) lens arrays are crucial in laser systems, and their precision can be improved through the development of an optical collimation system and the use of thermal compensation to correct for non-uniform thermal expansion.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Jincheng Chen, Qiuyu Fang, Li Huang, Xin Ye, Luhong Jin, Heng Zhang, Yinqian Luo, Min Zhu, Luhao Zhang, Baohua Ji, Xiang Tian, Yingke Xu
Summary: This study developed a novel deep learning accelerated SRRF method that enables super-resolution reconstruction with only 5 low SNR images, and allows real-time visualization of microtubule dynamics and interactions with CCPs.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Pan Liu, Yongqiang Zhao, Ning Li, Kai Feng, Seong G. Kong, Chaolong Tang
Summary: This article presents a technique for inverse design of multilayer deep-etched gratings (MDEG) using a deep neural network with adaptive solution space. The proposed method trains a deep neural network to predict the probability distribution across the discretized space, enabling evaluation of an optimal solution. The results show improved efficiencies using only a reduced dataset and avoiding one-to-many mapping challenges.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Evelina Bibikova, Nazar Al-wassiti, Nataliya Kundikova
Summary: Light beams possess three types of angular momentum, namely spin angular momentum, extrinsic orbital angular momentum, and intrinsic orbital angular momentum. The interaction between these momenta leads to the spin-orbit interaction of light and topological effects. This study predicts a new topological effect resulting from the influence of extrinsic orbital angular momentum on spin angular momentum in converging asymmetrical light beams. It manifests as the transformation of linear polarized light into elliptically polarized light when an asymmetrical beam passes through the left or right half of the focal plane. The measured value of the topological circular amplitude anisotropy R was found to be R = +/- (0.60 +/- 0.08) x 10(-3). This new effect contributes to our understanding of light and has potential applications in developing sensors in optics.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Hamdy H. Wahba
Summary: This study combines multiple-beam Fizeau interference and single-shot digital holographic interferometry to study thick phase objects. By collecting optical phase at different focal planes, the angular spectrum method is used for the first time to retrieve optical phase maps through the focal depth. The proposed method proves to be effective in providing accurate numerical focusing and phase maps reconstruction.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Mohammed A. Isa, Richard Leach, David Branson, Samanta Piano
Summary: Due to the complexity of resolving object form and pose in images, new vision algorithms prioritize identification and perception over accurate coordinate measurement. However, the use of planar targets for coordinate measurement in vision systems has several drawbacks, including calibration difficulties and limited viewing angles. On the other hand, the use of sphere targets is infrequent in vision-based coordinate metrology due to the lack of efficient multi-view vision algorithms for accurate sphere measurements.
OPTICS AND LASERS IN ENGINEERING
(2024)
Article
Optics
Ildar Rakhmatulin, Donald Risbridger, Richard M. Carter, M. J. Daniel Esser, Mustafa Suphi Erden
Summary: This paper reviews the application of machine learning in laser systems. While machine learning has been widely used in general control automation and adjustment tasks, its application in specific tasks requiring skilled workforces for high-precision equipment assembly and adjustment is still limited. The paper presents promising research directions for using machine learning in mirror positional adjustment, triangulation, and optimal laser parameter selection, based on the recommendations of PRISMA.
OPTICS AND LASERS IN ENGINEERING
(2024)