Article
Engineering, Electrical & Electronic
Tianchong Zhang, Futing Yi, Bo Wang, Jing Liu, Xiaoxiao Liang, Mingming Yan, Yusa Wang, Zijian Zhao, Shuang-Nan Zhang
Summary: A method to fabricate spherically curved MSO plates is developed, allowing for reflection and focusing of X-rays. Testing results demonstrate successful curvature of the micro-slots in the MSO plates, showing an obvious focal spot with an angular resolution of about 5 arcmin.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2021)
Article
Optics
Nguyen Nu Hoang Anh, Hyug-Gyo Rhee, Young-Sik Ghim
Summary: In this study, a direct laser lithographic system combined with an auto-focus system and high accuracy rotational system was built to fabricate diffraction pattern arrays on a cylindrical lens, enabling the manufacture of hybrid optical elements with wider field of view. Furthermore, novel designs of linear zone plates and elliptical zone plates on a cylindrical lens were proposed, which demonstrated superior performance in both diffraction efficiency and resolution compared to traditional diffractive optical elements.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Mechanics
J. Scacco, G. Milani, P. B. Lourenco
Summary: This paper presents a numerical approach for predicting the reinforcement performance on curved masonry elements without specific single lap shear tests for the adopted materials. The method involves separate modeling of each constituent material of the reinforcement and the substrate, using the FE-based software Abaqus and addressing non-linear material properties with the CDP constitutive model. Experimental data are used to calibrate and validate the approach, with a discussion on the capabilities of the method based on load-displacement curves obtained. The approach is extended to untested curvatures, suggesting potential future applications.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Physical
Nicolas Crespo-Monteiro, Arnaud Valour, Victor Vallejo-Otero, Marie Traynar, Stephanie Reynaud, Emilie Gamet, Yves Jourlin
Summary: This paper introduces a method for direct micro-nanostructuring of ZrO2 layers using the sol-gel method, and presents a complete and suitable ZrO2 sol-gel method for achieving complex micro-nanostructures.
Article
Optics
E. O. Epifanov, M. A. Tarkhov, E. R. Timofeeva, I. Trofimov, I. M. Asharchuk, D. Obydennov, Weichang Li, S. A. Gonchukov, N. Minaev
Summary: This article demonstrates the fundamental potential of creating microstructures for various functional purposes through the capabilities of the two-photon femtosecond polymerization method, showcasing the technological approach for creating a micro-optical holder for optical fiber matching with sensitive optical elements. The experimental results showed the optical matching of fibers with different optical devices using near infrared-sensitive photopolymerization techniques.
LASER PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Wenchao Sun, Fei Li, Jin Tao, Panyuan Li, Licai Zhu, Jiwei Li, Jinguang Lv, Weibiao Wang, Jingqiu Liang, Haizheng Zhong
Summary: In this study, high resolution patterned PQDs with a pixel size of 2 μm were successfully fabricated using a template with SU8 micropores, demonstrating the promising application of PQDs in micro-LED technology.
Article
Automation & Control Systems
Young-Gwang Kim, Hyug-Gyo Rhee, Young-Sik Ghim
Summary: To simplify complex optical systems, a next-generation optical component combining a refractive element and a diffractive element is desired. Maintaining the focal point on a curved surface is crucial for fabricating these components, which poses challenges for laser processes and metrology systems. By utilizing a coaxial confocal microscopic displacement sensor, it was demonstrated that precise patterns can be fabricated on curved surfaces for diffractive optical elements, with promising optical performance matching mathematical modeling.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Elmina Kabouraki, Vasileia Melissinaki, Amit Yadav, Andrius Melninkaitis, Konstantina Tourlouki, Theodoros Tachtsidis, Nikolaos Kehagias, Georgios D. Barmparis, Dimitris G. Papazoglou, Edik Rafailov, Maria Farsari
Summary: A series of organic-inorganic hybrid photoresists with enhanced laser-induced damage threshold have been developed for the fabrication of micro-optical elements. These photoresists are suitable for three-dimensional multiphoton lithography and nanoimprint lithography, showing potential for future mass production of MOEs.
Article
Chemistry, Physical
Lei Wu, Yewei Ren, Huaicheng Zhou, Yu Lin, Renxing Liu, Linmao Qian, Bingjun Yu
Summary: This study proposed a novel double-layer rotational symmetry cantilever (DRSC)-based probe lithography for the facile and cost-effective fabrication of large-area, sensitive, and reproducible SERS substrates. The DRSC architecture was optimized and its strength and fatigue were assessed using finite element simulation. The proposed lithography exhibited identical stiffness in all horizontal directions and achieved high-precision fabrication under high-speed reciprocating processes. SERS spectra of malachite green (MG) showed impressive enhancement, excellent stability, and high reproducibility, and practical applications of the prepared SERS substrates were demonstrated.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Zuoqin Ding, Han Wang, Taige Li, Xia Ouyang, Yaocheng Shi, A. Ping Zhang
Summary: This paper presents the design, fabrication, and characterization of polymer optical waveguides using digital UV lithography. Nonlinear compensation and proximity effects compensation are applied to minimize stitching loss and improve the accuracy of the fabrication process. The experimental results demonstrate the feasibility of the lithography technology in producing waveguides and other related devices with low bending loss and propagation loss.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Takashi Yanagishita, Takchiu Sou, Hideki Masuda
Summary: Flexible molds with micro-nano hierarchical structures were made using anodic porous alumina. These molds were used to create superhydrophobic micro-nano hierarchical surfaces on substrates with different curvatures using photo-nanoimprinting. The surfaces exhibited water contact angles exceeding 150 degrees.
Article
Optics
Hadi Amata, Qiang Fu, Wolfgang Heidrich
Summary: Ultra-thin optical components with high design flexibility are in high demand for optical and imaging systems. However, conventional etching-based methods used for fabrication of these components result in high surface roughness and aspect ratio-dependent etching rate. In this study, an alternative method using plasma-enhanced chemical vapor deposition (PECVD) is proposed to overcome these drawbacks and achieve improved surface smoothness.
Article
Polymer Science
Eun Seon Kim, Sung Hyun Kim, Sang-Jin Lee, Jae Heung Lee, Minseon Byeon, Dong Hack Suh, Woo Jin Choi
Summary: This study demonstrates a convenient technique for creating multiscale wrinkles on fluorocarbon thin films deposited on soft and stiff PDMS substrates by regulating the elastic properties of the substrates. The wrinkling structures were strongly influenced by the elastic properties of the substrate during a fluorocarbon polymer sputtering process, leading to different patterns on stiff and soft PDMS substrates.
Article
Chemistry, Multidisciplinary
Jia-Ahn Pan, Zichao Rong, Yuanyuan Wang, Himchan Cho, Igor Coropceanu, Haoqi Wu, Dmitri Talapin
Summary: This work demonstrates the direct optical patterning of oxide nanoparticles, allowing for micron resolution patterning of materials like ZrO2, TiO2, HfO2, and ITO. By mixing the nanoparticles with a photosensitive compound and irradiating with 405 nm light, the researchers were able to achieve precise patterning and control of material properties for use in photonic applications. The fabricated structures showed excellent optical transparency, high refractive index, and good thermal stability, making them suitable for diffractive optical elements and other photonic devices.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Emilia Pruszynska-Karbownik, Daniel Jandura, Maciej Dems, Lukasz Zinkiewicz, Artur Broda, Marcin Gebski, Jan Muszalski, Dusan Pudis, Jan Suffczynski, Tomasz Czyszanowski
Summary: This article introduces a compact, single-layer inverted refractive index-contrast grating (ICG) as an alternative to bulky multi-layered distributed Bragg reflectors. The ICG offers nearly total optical power reflectance and polarization discrimination, as well as phase tuning of the reflected and transmitted light.
Review
Chemistry, Analytical
Gergely Hantos, David Flynn, Marc P. Y. Desmulliez
Summary: A novel taxonomy of built-in self-test (BIST) methods for testing micro-electro-mechanical systems (MEMS) is presented in this study. With MEMS testing accounting for 50% of total costs, cost-effective and non-intrusive BIST solutions are actively sought after. A classification table benchmarks different testing methods based on ease of implementation, usefulness, test duration, and power consumption, providing insights into their domain of application.
Article
Optics
Yuanyuan Wang, Chengyong Shi, Huangrong Xu, Yuanjie Zhang, Weixing Yu
Summary: A bionic compound eye camera is developed by 3-D printing technology, with a hemispherical surface for mounting compound lens array and an optical relay system to integrate with a CMOS imaging sensor. The optical relay system successfully solves the focal plane mismatch problem between the curved compound eye and the CMOS imaging sensor. The compact bionic compound eye imaging system shows great potential and value in military, medical, and engineering applications.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Tian Xia, Shubo Cheng, Weixing Yu, Shaohua Tao
Summary: The study introduces a modified fractal spiral forked plate (MFSFP) that can generate three coplanar optical vortices at multiple focal planes, including two off-axis vortices and one axial vortex. By designing a proper filter, the axial vortex and off-axis vortex can have equal intensity, exhibiting self-similar optical vortices.
Article
Materials Science, Multidisciplinary
Tian Xia, Shubo Cheng, Weixing Yu, Shaohua Tao
Summary: The study proposes a modified spiral petal-like zone plate (MSPZP) to generate polygon-like beams with tailorable shape, size, and topological charge. By adjusting different parameters, the shape, size, and topological charge of the polygon-like beam can be customized, demonstrating high flexibility in beam generation.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Xiaojun Zhou, Aiguo Song, Depeng Kong, Weixing Yu
Summary: This study proposes a method for fabricating precise high-efficiency 2D multi-mode fiber array coupler, which can achieve an average coupling efficiency of 57.51% by improving the design and coupling with a microlens array. It demonstrates the potential of this coupler in various applications such as LIDAR, optical communication systems, and microwave photonics systems.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Gergely Hantos, Marc P. Y. Desmulliez
Summary: This article investigates the root causes of failures affecting the low-frequency response of MEMS microphones and proposes methods to induce these failures. The information obtained from the frequency response of the devices is insufficient to separate the root causes of failures, but additional information about the circumstances regarding the onset of defects is sufficient for root cause identification.
IEEE TRANSACTIONS ON SEMICONDUCTOR MANUFACTURING
(2021)
Article
Optics
Chenyang Li, Qifa Wang, Hang Diao, Zhen Hao, Weixing Yu, Kaihui Liu, Xuetao Gan, Fajun Xiao, Jianlin Zhao
Summary: Two-dimensional transition metal dichalcogenides show remarkable optical properties, but face limitations in electronics and photonics due to low absorption and emission rates. By integrating monolayer MoSe2 into an Ag nanowire-on-mirror nanocavity, photoluminescence (PL) enhancement is achieved through Fano resonance. The nanocavity with multiple resonances enables spatial mode overlap, resonantly enhancing absorption and PL quantum yield. The combination of Fano resonance and mode matching leads to over 1800-fold PL enhancement, offering a promising approach for highly efficient optoelectronic devices.
LASER & PHOTONICS REVIEWS
(2022)
Article
Engineering, Electrical & Electronic
Tian Xia, Shubo Cheng, Weixing Yu, Wenke Xie, Shaohua Tao
Summary: A polygon-like light-arm zone plate (PLZP) is proposed to generate polygon-like light-arm beams, where the arms can be identified clearly by using the appropriate transverse azimuthal shift phi. The proposed zone plates can be used to trap particles into different shapes and are applicable for optical communication.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Engineering, Manufacturing
Gergely Hantos, Gergely Simon, Marc P. Y. Desmulliez
Summary: This article presents a framework for detecting failures in mobile phone microphones, using frequency response analysis and acoustic measurements with new techniques. It demonstrates a high success rate for non-invasive fault detection.
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2022)
Article
Optics
Tian Xia, Shubo Cheng, Weixing Yu, Shaohua Tao
Summary: A modified generalized composite kinoform Fibonacci lens (MGCKFiL) is proposed to produce two foci with the same resolution and long focal depths. The phase generated by the weighted Gerchberg-Saxton algorithm expands the focal depths of two foci for the MGCKFiL.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Assel Ryspayeva, Adilet Zhakeyev, Marc P. Y. Desmulliez, Jose Marques-Hueso
Summary: The article presents a 3D printing technique that enables the manufacturing of selectively plated polymer objects using photopolymer printing and copper metallization. The method eliminates the sensitization step and involves the inclusion of silver seeds in the printing process to enable direct electroless copper metallization.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Engineering, Multidisciplinary
Falk Tauber, Marc Desmulliez, Olivier Piccin, Adam A. Stokes
Summary: Since the 1960s, soft robotics has been steadily growing, and recent innovations in rapid prototyping and flexible materials have enabled the development of fully flexible and untethered soft robotic systems. The integration of novel sensors and manufacturing processes shows promise for the future of soft robotics, with a focus on manufacturing techniques and tactile sensors for better interaction with the environment. The article highlights the potential of embodied intelligence in soft robots for autonomous computation from sensory inputs.
BIOINSPIRATION & BIOMIMETICS
(2023)
Proceedings Paper
Optics
Jinheng Liu, Yuanjie Zhang, Huangrong Xu, Weixing Yu
Summary: In this study, a bionic curved compound-eye camera (BCCEC) was analyzed for its potential in 3D detection through detailed examination of overlapping field of view (FOV) among the ommatidia and design of a new experiment. Results showed that more than 95% of FOV can be reconstructed in 3D when object distance exceeds 32 cm. Furthermore, an addressing algorithm and a new 3D detection experiment were proposed to achieve automatic calibration of all ommatidia, demonstrating the capability of BCCEC to obtain multi-dimensional information with high application potential in obstacle avoidance and navigation.
AOPC 2021: OPTICAL SENSING AND IMAGING TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Sadeque Reza Khan, Srinjoy Mitra, Marc P. Y. Desmulliez
Summary: Capsule endoscopy is considered a technological breakthrough in the diagnosis and treatment of gastrointestinal pathologies. Accurately determining the capsule's location is crucial for surgical intervention or drug delivery, necessitating further research to improve localization techniques. The dual use of wireless power transfer as a method for determining capsule location shows promising results with a maximum error of 12%.
Article
Biochemical Research Methods
Gergely Simon, Caroline Busch, Marco A. B. Andrade, Julien Reboud, Jonathan M. Cooper, Marc P. Y. Desmulliez, Mathis O. Riehle, Anne L. Bernassau
Summary: This paper introduces an acoustic bandpass method that overcomes traditional limitations, utilizing a single transducer pair for stable continuous flow sorting of blood cells. The method demonstrates high purity and efficiency coefficients when sorting particles of various sizes, and is further validated for separating red blood cells, white blood cells, and smaller particles.
