Article
Optics
Yayan Huang, Rui Zhao, Wenhao Miao, Dan Liang, Zhiqiang Liu, Xian Wei, Zhongcheng Liang
Summary: This paper proposes a tunable zoom bifocal liquid lens based on selective wettability. The lens consists of immiscible internal and external droplets that can change their curvatures by applying different voltages, resulting in continuous movement of the long and short focal points. Experimental results demonstrate the feasibility and practicability of this concept.
Article
Optics
Jingyu Mo, Xuefeng Chang, Duoji Renqing, Jinpeng Zhang, Longxing Liao, Shanming Luo
Summary: This study presents a novel type of concave lens array on an aspheric convex substrate (CLAACs) composed of an aspheric substrate and a spherical concave subeye array. A method for designing, fabricating, and characterizing the CLAACs is proposed. The results demonstrate the feasibility and effectiveness of this method for designing and fabricating lens arrays with complex discontinuous surfaces.
Article
Optics
Miao Xu, Yating Liu, Senhao LI, Jing LI, Lyudi Zhang, Hongbo Lu
Summary: This study demonstrates a DBA liquid microlens array (LMA) with a tunable focal length, which utilizes the unique deformation of DBA fluid under a direct current electric field to form self-assembled droplet arrays. The DBA LMA has a fast response time, high optical transmittance, and good thermal stability, making it suitable for applications in image processing, portable electronic devices, beam steering, ophthalmology, and 3D displays.
Article
Optics
Yang Shu, Wenchen Zhou, Zhixiong Zhou, Allen Y. Yi
Summary: In this study, a rapid non-isothermal imprinting process for Fresnel lens arrays was proposed, which can be carried out at room temperature to greatly reduce thermal cycle time and energy consumption. The process allows for production of high-quality microlenses with a high precision surface finish.
Article
Optics
Souptik Mukherjee, Zheng-Nan Yuan, Zhi-Bo Sun, An-Ran Li, Chen-Bing Kang, Hoi-Sing Kwok, Abhishek K. Srivastava
Summary: The article introduces a switchable lens device combining a fast FLC-based polarization rotation unit and a passive LC lens, allowing rapid access to multiple focal points, making it a convenient device for VR applications.
Article
Materials Science, Multidisciplinary
Vinay Kumar, Fabrizio Gota, Julien Neyret, Ngei Katumo, Aditya Chauhan, Stephan Dottermusch, Bryce S. Richards, Ian A. Howard
Summary: A phosphor-particle-loaded microlens array on a polymer substrate provides an unclonable anticounterfeiting label design. The random coincidences of light focused by a microlens with a phosphor microparticle create a random pattern of bright emission points. The authentication of these labels using a single smartphone is possible through the smartphone flashlight and camera, with >99% confidence in matching test and reference images and a 1 cm tolerance for smartphone positioning accuracy.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Optics
Hanheng Du, Waisze Yip, Zhiwei Zhu, Sandy To
Summary: A novel two-degree-of-freedom vibration generator (2DOF-VG) is designed for generating optical microstructure arrays, and a detailed multi-physics finite element method is proposed to simulate its working performance accurately. The numerical simulation algorithm successfully predicts the surface topography of microstructure arrays, and two unique microstructure arrays are fabricated, demonstrating the feasibility and flexibility of the 2DOF-VG.
Article
Materials Science, Multidisciplinary
Yueqi Zhai, Jiaqi Niu, Jingquan Liu, Bin Yang
Summary: A large-scale artificial compound eye with a wide field of view and high sensitivity was fabricated using a low-cost strategy. The collaboration of the compound eye and CMOS sensor enables capturing multiple images of human organs. This micro-based imaging system has significant potential in medical applications and drone navigation.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Nanoscience & Nanotechnology
Houchao Zhang, Tianyu Qi, Xiaoyang Zhu, Longjian Zhou, Zhenghao Li, Yuan-Fang Zhang, Wenchao Yang, Jianjun Yang, Zilong Peng, Guangming Zhang, Fei Wang, Pengfei Guo, Hongbo Lan
Summary: The study introduces a method for efficiently manufacturing CMLAs with a high fill-factor using electric-field-driven microscale 3D printing of PDMS. By adjusting printing parameters, the profile and fill-factor of CMLAs can be controlled to enhance their optical performance. The results show good morphology and optical properties of the prepared CMLAs, suggesting a potential cost-effective route for manufacturing large-area CMLAs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
Chang-Mo Kang, Simone Bianconi, Travis Hamilton, Jacob Rabinowitz, Skyler Wheaton, Lining Liu, Melville Ulmer, Hooman Mohseni
Summary: Solid immersion microlens arrays can improve the sensitivity of infrared focal plane arrays by focusing light into the most sensitive part of each pixel. This research presents an all-in-one solution for producing solid immersion microlens arrays compatible with various infrared FPAs, regardless of their substrate material. The implementation of this method in short-wavelength infrared FPAs demonstrated a 7.4 times improvement in quantum efficiency.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Optics
Farid Khoshkhati, Mohammad Mohammadimasoudi, Seyedeh Nastaran Hosseini, Isa Ahmadalidokht, Hosna Tajvidisafa
Summary: Tunable liquid crystal (LC) lenses have attracted significant attention for their lightweight, low cost, and versatility in various applications. The thickness of the LC cell is a critical design parameter, and the introduction of the Fresnel structure can achieve a higher focal length dynamic range without increasing the cell thickness.
Article
Optics
Rong-Ying Yuan, Xiao-Li Ma, Fan Chu, Guang-Xu Wang, Min-Yang He, Chao Liu, Qiong-Hua Wang
Summary: This paper proposes an optofluidic lenticular lens array (OLLA) for a switchable 2D/3D display. By filling different mediums, it can achieve 2D and 3D displays respectively, and experiments confirm high-resolution display on smartphones.
Article
Engineering, Electrical & Electronic
Xiao-Feng Liu, Rui Wang, Guo-Dong Wang, Teng-Feng Yao, Hua Miao, Rong Sun
Summary: A novel fabrication method combining thermal reflow process was developed to prepare highly desired optical polymer waveguides. The influence of processing parameters on the profiles of the resultant polymer waveguides was systematically investigated and the mode-of-action of thermal reflow process was proposed. The as-fabricated waveguides exhibited better optical performance than those of polymer waveguides fabricated via photolithography.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Multidisciplinary
Saba Zafar, Dong-Wei Li, Acner Camino, Jun-Wei Chang, Zuo-Qiang Hao
Summary: High power supercontinuum is generated by focusing 800 nm and 400 nm femtosecond laser pulses in fused silica. The spectral energy density between the two fundamental laser wavelengths is significantly increased by optimizing the phase matching angle, overcoming the disadvantage of lower power in ranges far from the fundamental wavelength.
Article
Engineering, Manufacturing
Chunxin Liu, Taras Oriekhov, Cherrie Lee, Clarissa M. Harvey, Michael Fokine
Summary: This study demonstrates that rapid manufacturing of high purity fused silica glass micro-optics can be achieved using a filament-based glass 3D printer, resulting in fully dense lenses with uniform focal lengths and good imaging performance.
3D PRINTING AND ADDITIVE MANUFACTURING
(2022)
Review
Chemistry, Multidisciplinary
Shao-Feng Liu, Zheng-Wei Hou, Linhan Lin, Zhengcao Li, Hong-Bo Sun
Summary: 3D laser nanoprinting revolutionizes manufacturing by allowing maskless fabrication of 3D nanostructures at a resolution beyond the optical diffraction limit. It offers printed structures with unique physical, chemical, or mechanical properties not seen at the macro scale. However, its reliance on photopolymerization limits its usability to certain materials and functionalities. The ability to print diverse functional materials and the development of laser nanoprinting techniques beyond photopolymerization open up exciting new applications in nanophotonics and microelectronics.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shun-Xin Li, Hong Xia, Tian-Yu Liu, He Zhu, Jia-Cheng Feng, Yang An, Xu-Lin Zhang, Hong-Bo Sun
Summary: Nanostructures offer a cost-effective method to enhance the light-trapping capability of optoelectronic devices. However, the instability of perovskite materials restricts the practical application of nanostructured optoelectronic devices. In this study, in situ encapsulated moire lattice perovskite photodetectors were fabricated using nanograting-structured soft templates with relative rotation angles. The moire lattice structure improved the light-harvesting ability of the perovskite crystal, resulting in enhanced device performance and long-term stability.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Shuo Zhao, Zheyu Li, Suyao Yin, Qi-dai Chen, Hong-bo Sun, Liping Wen, Lei Jiang, Kai Sun
Summary: Biomimetic materials that mimic competitive interactions in ecosystems offer a promising solution to address bacterial resistance. This study demonstrates the feasibility of using spiny particles to compete with bacteria for nutrients and inhibit their growth without inducing bacterial resistance. The material also shows good biocompatibility, making it a potential candidate for applications in reducing bacterial resistance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Guan-Yao Huang, Linhan Lin, Shuang Zhao, Wenbin Li, Xiaonan Deng, Simian Zhang, Chen Wang, Xiao-Ze Li, Yan Zhang, Hong -Hua Fang, Yixuan Zou, Peng Li, Benfeng Bai, Hong -Bo Sun, Tairan Fu
Summary: Excitons are quasi-particles composed of electron-hole pairs and play a crucial role in determining the optical properties of monolayer TMDs. Manipulating their charge states in a reversible manner remains challenging. By utilizing femtosecond-laser-driven atomic defect generation, electron transfer, and surface molecular desorption/adsorption, we have developed an all-optical approach to control the charge states of excitons in monolayer MoS2, enabling reconfigurable optical encoding.
Article
Nanoscience & Nanotechnology
Ming-Yu Ma, Nian-Ke Chen, Dan Wang, Dong Han, Hong-Bo Sun, Shengbai Zhang, Xian-Bin Li
Summary: Using first-principles calculations, this study systematically investigates the properties of intrinsic defects and extrinsic dopants in monolayer AgI, revealing that Ag vacancy (VAg) and Be substitution on Ag site (BeAg) are the most promising p-type and n-type doping candidates, respectively, laying the foundation for the development of 2D electronic devices.
MATERIALS TODAY NANO
(2023)
Article
Chemistry, Multidisciplinary
Shu-Yu Liang, Yue-Feng Liu, Zhi-Kun Ji, Shen-Yuan Wang, Hong Xia, Hong-Bo Sun
Summary: Researchers have developed a femtosecond laser-induced forward transfer (FsLIFT) technology for programmable fabrication of high-resolution full-color perovskite quantum dot (PQD) arrays and arbitrary micropatterns. This technology does not require chemical reagent treatment or mask contact, ensuring the preservation of the photophysical properties of PQDs. The high-resolution PQD array achieved using FsLIFT can facilitate the development of diverse practical applications based on patterned PQDs.
Article
Chemistry, Multidisciplinary
Xiao-Jie Wang, Shuang Zhao, Hong-Hua Fang, Renhao Xing, Yuan Chai, Xiao-Ze Li, Yun-Ke Zhou, Yan Zhang, Guan-Yao Huang, Cong Hu, Hong-Bo Sun
Summary: Laser-induced quantum emitters in aluminum nitride demonstrate robust emission with strong zero phonon line, narrow line width, and weak phonon side bands. These results illustrate the potential of laser writing to create high-quality quantum emitters for quantum technologies and provide further insight into laser writing defects in relevant materials.
Article
Chemistry, Multidisciplinary
Jian-Guan Hua, Hang Ren, Jiatai Huang, Mei-Ling Luan, Qi-Dai Chen, Saulius Juodkazis, Hong-Bo Sun
Summary: Femtosecond lasers enable flexible and thermal-damage-free ablation of solid materials, but true 3D nano-sculpturing has not been achieved due to technical challenges. This article proposes a new technique using cavitation dynamics and backside ablation to achieve stable material removal for precise 3D fabrication. With this technique, 3D devices with surface roughness less than 10 nm can be produced, enabling novel structural and functional micro-nano optics and non-silicon micro-electro-mechanical systems.
Article
Optics
Ze-Zheng Li, Zhen-Nan Tian, Zhong-Tian Li, Yang Ouyang, Qi-Dai Chen, Hong-Bo Sun
Summary: The composite waveguide method is proposed to increase the range of photon propagation constant beta, which significantly expands the variation range of beta. With this method, the researchers successfully constructed the most compact FsLDW directional couplers and achieved the reconstruction of the Hamiltonian of a Hermitian array. This study represents a further step towards fine control of waveguide coupling and compact integration of FsLDW photonic integrated circuits.
PHOTONICS RESEARCH
(2023)
Article
Physics, Applied
Xiao-Jie Wang, Jia-Tai Huang, Hong-Hua Fang, Yun Zhao, Yuan Chai, Ben-Feng Bai, Hong-Bo Sun
Summary: By using dielectric microspheres for laser focusing, we have successfully created high brightness single-photon emitters in hexagonal boron nitride and enhanced the emission via photonic coupling. This approach provides a feasible way to generate high-performance single-photon emitters while enabling precise coupling with optical resonators.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Dong-Dong Han, Ye-Can Zhang, Ji-Chao Li, Hao Zhou, Jiang-Wei Mao, Yong-Lai Zhang, Hong-Bo Sun
Summary: This study presents a conformal active-material loading strategy using laser-induced graphene (LIG-O) electrodes for high-performance planar microsupercapacitors (MSCs). The planar MSCs showed a 10-fold improvement in areal capacitances and functioned as energy storage devices for a flexible ink display system.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Optics
Xue-Peng Pan, C. A. Sun, Shan-Ren Liu, B. O. Wang, Meng-Meng Gao, Q. Guo, Qi-Dai Chen, Hong-Bo Sun, Yong-Sen Yu
Summary: This paper proposes and demonstrates a novel high-sensitivity temperature sensor based on a chirped thin-core fiber Bragg grating Fabry-Perot interferometer (CTFBG-FPI) and the Vernier effect. Two CTFBG-FPIs with different interferometric cavity lengths are inscribed inside a thin-core fiber using femtosecond laser direct writing technology to form a Vernier effect system. The measured temperature sensitivity of this sensor is -1.084 nm/degrees C in a range of 40-90 degrees C. This sensor is expected to play a crucial role in precision temperature measurement applications.
Article
Chemistry, Physical
Monan Liu, Qing Wang, Ai-Wu Li, Hong-Bo Sun
Summary: This article summarizes recent research and proposes an all-light solution using graphene-oxide-based soft robots. The study demonstrates that lasers can precisely define actuators to form joints and facilitate efficient energy storage and release, enabling complex motion control.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Optics
Dong-Dong Han, Yong -Lai Zhang, Zhao-Di Chen, Ji-Chao Li, Jia-Nan Ma, Jiang -Wei Mao, Hao Zhou, Hong -Bo Sun
Summary: This article reports a moisture responsive shape-morphing slippery surface that enables simultaneous moisture responsive shape-morphing and oil-lubricated water repellency. It is prepared by creating biomimetic microstructures on graphene oxide membrane and subsequent lubricating with a thin layer of oil on the laser structured reduced GO surface. The integration of this surface with an LRGO/GO bilayer actuator enables droplet sliding ability and enhanced moisture deformation performance, demonstrating versatility for active/passive trapping, droplet manipulation, and sensing.
OPTO-ELECTRONIC ADVANCES
(2023)
Article
Engineering, Electrical & Electronic
Xiao-Liang Ge, Jun-Hao Yang, Hang Ren, Zhi-Jun Qin, Qi-Dai Chen, Dong-Dong Han, Yong-Lai Zhang, Su Xu, Hong-Bo Sun
Summary: This study demonstrates the first experimental application of self-superhydrophobic antennas, which can maintain stability in terms of return loss, radiation pattern, and efficiency across multiple frequency bands. The compatibility of writing hydrophobic nanostructures on both dielectrics and metals with commercial printed circuitry techniques makes this technique a powerful and generalized solution for all-weather wireless communication systems.
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER
(2023)