Article
Optics
Zhen Pan, Lianzhong Deng, Long Cheng, Yunhua Yao, Dalong Qi, Wenjing Cheng, Zhenrong Sun, Shian Zhang
Summary: We experimentally demonstrate that trivalent samarium ions in BaFCl nanocrystals can be efficiently converted into divalent ions under the influence of an 800 nm fs laser field. We investigate the dependence of the luminescence intensity of the photoinduced divalent ions on the femtosecond laser power, central wavelength, and polarization. Theoretical fits suggest that a resonance-mediated (2 + 2) four-photon absorption is most likely involved in the multiphoton induced photoreduction process.
JOURNAL OF LUMINESCENCE
(2023)
Article
Materials Science, Multidisciplinary
Yong Wang, Yunlong Li, Jiao Geng, Zhiming Hu, Fengjiang Liu, Liping Shi, Jiu-an Lv, Min Qiu
Summary: This study reports a method of constructing cross-linked liquid crystal polymer microstructures using femtosecond laser direct writing (FsLDW) and systematically investigates their light-driven behaviors. The arbitrary pattern machining of microstructures is achieved through optimization of processing parameters, and a micromirror system capable of controllable swing and rotation is demonstrated.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Shiru Jiang, Chul-Soon Park, Woo-Bin Lee, Sang-Shin Lee
Summary: By utilizing multistep fs-laser writing with a low repetition rate, photoreduction-insensitive GO/rGO patterning is achieved, maintaining a minimum linewidth and optimizing device performance without compromising feature size.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Ceramics
Weijie Zhou, Rao Li, Min Li, Pan Tao, Xunsi Wang, Shixun Dai, Baoan Song, Wei Zhang, Changgui Lin, Xiang Shen, Tiefeng Xu, Peiqing Zhang
Summary: This paper presents the fabrication of microlens arrays with good optical quality using wet-etching assisted femtosecond laser direct writing technology. The microlenses exhibit a wide range of diameters and achieve uniform dense stacking in the mid-infrared wavelength range. The fabricated microlens arrays have significant applications in cutting-edge mid-infrared fields.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Qi Hu, Haomin Guo, Haiwen Liu, Runmin Wu, Chengyun Zhang
Summary: The letter proposes a processing method based on laser-induced backward transfer (LIBT) technique, where the sample is placed in a bound state to achieve equal-thickness interference, and laser direct writing (LDW) ablation and interference effect are combined to induce 2D biperiodic microstructures. The effects of laser power and interference pattern on the microstructures are studied.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Xiaochuan Ding, Yao Zhao, Ali Hassan, Yunlu Sun, Zhishan Hou, Wei Xue, Yu Cao
Summary: With the increase in information density, signal crosstalk and crossover pose challenges to the further development of chip integration and packaging density. This study proposes a novel waveguide structure, the photonic jumper wire, to overcome technical restrictions in waveguide crossing and parallel line wrapping, thereby enabling improved integration of photonic chips.
Article
Chemistry, Physical
Stoffel D. Janssens, David Vazquez-Cortes, Burhannudin Sutisna, Eliot Fried
Summary: This novel approach presents a method for creating durable nanochannels by using a femtosecond laser to directly write optically accessible nanochannels. The dimensions of these nanochannels can be tuned by adjusting the laser pulse energy. The mechanism of nanostrip formation and the patterning of the film through laser writing are also investigated. The applicability of the laser-written nanochannels is demonstrated by fabricating a nanofluidic device that fills with water via capillary action.
Article
Chemistry, Analytical
Siddihalu Lakshitha Madunil, Totaro Imasaka, Tomoko Imasaka
Summary: This study developed a technique based on multiphoton ionization mass spectrometry for the reliable identification of barbiturates. By adjusting the laser wavelength, optimal ionization of both molecular ion and large fragment ions was achieved. Different barbiturates exhibited different optimal ionization spectral regions.
ANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Yi-Jui Chen, Wen-Huei Chang, Chia-Ying Li, Yi-Chun Chiu, Chih-Chia Huang, Chun-Hung Lin
Summary: The study proposes a novel method for synthesizing a gold nanoparticle monolayer directly on the surface of SU-8, investigating the effects of different polymer surfaces and photoinitiator concentrations on photoreduction ability, as well as the influence of SU-8 initial curing time and reduction repetition times on nanoparticle sizes and densities.
MATERIALS & DESIGN
(2021)
Article
Optics
Yujie Xiong, Shixiang Wang, Zhixiang Chen, Xiaoli Sun, Hongliang Liu, Yuechen Jia, Feng Chen
Summary: Waveguide lasers with compact packages have gained significant interest in recent years due to the development of integrated photonics and demand for miniaturized photonic devices. This study utilizes femtosecond laser direct writing (FsLDW) technology to fabricate cladding waveguides in Tm:YLF crystal. A low-threshold waveguide laser at 1877 nm is achieved using a Ti:sapphire laser pump at 779 nm. In addition, a pulsed Q-switched Tm:YLF waveguide laser is demonstrated by employing a Bi2Se3-based saturable absorber (SA) element. The experimental results highlight the potential of Tm:YLF and FsLDW in constructing compact mid-infrared lasers.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Xiaoyan Sun, Zikun Chang, Li Zeng, Xinran Dong, Youwang Hu, Ji'an Duan
Summary: The resonant wavelength of FBG can be fine-tuned through stress annealing, improving its temperature sensing properties and high-temperature stability.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Tatiana Lipateva, Alexey Lipatiev, Sergey Lotarev, Georgiy Shakhgildyan, Sergey Fedotov, Vladimir Sigaev
Summary: In this study, a simple laser-assisted metallization technique was proposed for fabricating gold micropatterns on a glass substrate. The technique allows for selective laser-assisted deposition of metals and has potential applications in microelectronic components and lab-on-a-chip devices.
Review
Chemistry, Multidisciplinary
Shuai Xu, Yangfan Zhang, Ting Wang, Le Zhang
Summary: Micro-optics based on artificial adjustment of physical dimensions, such as phase, polarization, and wavelength, play a vital role in contemporary information optoelectronic technology and offer an important approach to overcome the future bottleneck of microelectronic technology. Geometric phase optical components, achieved through nanometer-scale unit structure arrangement, allow precise control of the properties of the light field, including polarization, phase, and amplitude, at the sub-wavelength scale. These components have gained extensive attention in the fields of holographic imaging and polarization optics. This paper reviews the physical mechanisms and research progress of various methods for preparing polarization converters and geometric phase optics using femtosecond laser technology, while discussing the challenges associated with fabricating ultrafast optical devices.
Article
Chemistry, Physical
Muhammad Qadir, Jonathan Albo, Imanol de Pedro, Miroslav Cieslar, Ignacio Hernandez, Philipp Bruener, Thomas Grehl, Marcus Castegnaro, Jonder Morais, Paulo R. Martins, Cristiane G. Silva, Muhammad Nisar, Jairton Dupont
Summary: Efficient and robust photocatalysts have been developed by combining bimetallic CuNi nanoparticles and TiO2. The CuNi NPs decorated TiO2 significantly promote the generation of CH3OH and syngas under visible light irradiation, achieving high yields and quantum efficiency.
MOLECULAR CATALYSIS
(2022)
Article
Optics
Deming Hu, Yang Zhang, Yuan-Yuan Zhao, Xuan-Ming Duan
Summary: This study proposes a dual-band grating coupler on a Ge-on-SOI platform, covering the 4.95 μm and 8.5 μm bands, with the introduction of Bragg gratings for crosstalk suppression. The simulated coupling efficiencies for the two bands are respectively high, indicating the potential applications in defense and environmental monitoring.
Article
Optics
Ming-Jie Deng, Yuan-Yuan Zhao, Zi-Xin Liang, Jing-Tao Chen, Yang Zhang, Xuan-Ming Duan
Summary: In DMD-based projection photolithography, optimizing the diffraction efficiency of DMD can improve the laser energy utilization. This study calculates and experimentally verifies the optimization of diffraction efficiency for different wavelengths and DMD pitch sizes.
Article
Optics
Hong-Zhon Cao, Liang-Chen Cao, Gan Fang, Yuan-Yuan Zhaoc, Guo-Juan Xud, Zhong-Yun Chen, Xuan-Ming Duanc
Summary: This research utilized laser trapping of gold nanoparticles in an aqueous solution to fabricate gold micro/nanostructures, achieving a high spatial resolution. A new additive and subtractive hybrid manufacturing technology was proposed and realized to improve the spatial resolution of the fabricated structures. The technology has great application prospects in the fabrication of high spatial resolution nanostructures, with a gold microring of line width 37 nm successfully fabricated through precise control of fabrication parameters.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Feng Jin, Jie Liu, Yuan-Yuan Zhao, Xian-Zi Dong, Mei-Ling Zheng, Xuan-Ming Duan
Summary: In this study, the high-resolution fabrication of hydrogen silsesquioxane (HSQ) using femtosecond laser direct writing (FsLDW) was demonstrated. A feature size of 26 nm in HSQ was achieved using a 780 nm femtosecond laser. The HSQ microstructures fabricated by FsLDW showed nanoscale resolution, smooth surface, and high thermal stability, indicating potential application in the fabrication of micro-nano devices.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Jian-Yu Wang, Feng Jin, Xian-Zi Dong, Jie Liu, Mei-Ling Zheng
Summary: Inspired by the intelligent response of flytrap, a smart hydrogel microactuator based on a bionic asymmetric structure is demonstrated. The grasping and releasing behavior of the microactuator for micro-objects can be realized and tuned by using pH-triggered shape changes, demonstrating its potential for applications, such as flexible robotics, smart sensors, and microscopic manipulation.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Physics, Applied
Xiaodi Zhang, Jundong Chen, Weihua Han, Yandong Ge, Yangyan Guo, Xianzi Dong, Xuanming Duan, Meiling Zheng, Fuhua Yang
Summary: This article introduces the study of using arrays of dopant-induced quantum dots as quantum bit platforms. A junctionless silicon nanowire transistor with dual physical channels with a diameter of 10 nm was fabricated using novel femtosecond laser projection exposure together with thermal oxidation. Quantum transport spectroscopy was conducted to demonstrate the evolution of the quantum transport process.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Rong-Rong Wang, Mei-Ling Zheng, Wei-Cai Zhang, Jie Liu, Teng Li, Xian-Zi Dong, Feng Jin
Summary: With the development of device miniaturization, there is a demand for a flexible and fast method to prepare microstructures with desired patterns. In this study, a novel photoreduction-polymerization method is developed for preparing conductive metal-polymer patterns. Ag/polyaniline nanocomposites are synthesized using maskless optical projection lithography technology, which demonstrates the surface-enhanced Raman scattering effect on the microstructures. This preparation method opens up new avenues for the fabrication of micro-nano devices such as sensors and detectors.
Article
Physics, Applied
Xiang-Yang Liu, Xian-Zi Dong, Min Guo, Feng Jin, Tian-Wei Wang, Xuan-Ming Duan, Zhen-Sheng Zhao, Mei-Ling Zheng
Summary: We propose a strategy to achieve narrow gaps in micro-nano structures using the femtosecond laser maskless optical projection lithography (MOPL) technique. Simulation predicts the trend of factors affecting the gap width, in agreement with experimental results. A narrow gap of 243 nm is obtained by optimizing the structure design and processing parameters. Furthermore, large-area functional micro-nano structures with narrow gaps are successfully fabricated. The strategy of optimizing gap width in MOPL is flexible and effective, providing wide application prospects in nanophotonics and semiconductor micro-nano device fabrication.
APPLIED PHYSICS EXPRESS
(2023)
Article
Optics
Duo Miao, Yuan-Yuan Zhao, Shun-Cheng Cai, Zhi-Xiang Li, Jing-Tao Chen, Jia-Ning An, Xuan-Ming Duan
Summary: This study proposes a new hybrid Dammann grating structure that can effectively generate an engineering-grade M2 x N2 spot array with a simple structural design. The hybrid Dammann grating exhibits high efficiency and low non-uniformity at a wavelength of 532 nm and can be fabricated through maskless projection lithography for large-scale, low-cost production.
Article
Chemistry, Physical
Chun Du, Ziyi Yang, Anzhen Mo, Xuanming Duan, Guowei Yang
Summary: In order to improve the performance of solar energy-driven water generation, optimization strategies such as alloying and combination of plasmonic and defect modulation are required for two-dimensional (2D) photothermal materials. However, the complex preparation process and insufficient solar spectrum absorption pose challenges in practical utilization. This study proposes a self-enhancing photothermal performance strategy induced by topological surface states (TSSs). By fabricating 2D WTe2 on mixed cellulose ester (MCE), a photothermal device with WTe2 @MCE exhibits an excellent photothermal evaporation rate, 1.09 kg·m(-2)·h(-1), which is 6.1 and 3.1 times higher than MCE and pure water, respectively. This improvement can be attributed to the characteristics of 2D Weyl semimetal WTe2 with TSSs, including high optical absorption capacity, low thermal diffusivity, specific heat capacity, and high carrier density, which are supported by experiments and calculations. The contribution of TSSs to the enhancement of optical absorption for efficient solar water generation is revealed through comparative experiments. Furthermore, the photothermal conversion mechanism is explored, revealing that the photoexcited electrons recombine with the holes through nonradiative mode, releasing thermal energy through phonon emission via multiple pathways. This work promotes the application of Weyl semimetal material with TSSs in solar water evaporation.
Article
Materials Science, Multidisciplinary
Bao-Xin Zhang, Feng Jin, Xian-Zi Dong, Jie Liu, Mei-Ling Zheng
Summary: Switchable lasing emission is achieved in this study using solvent responsive photonic crystals and dye doped polymer films. The lasing wavelength can be flexibly switched by tuning the stopband of the photonic crystals and the corresponding dye molecules. This study presents an innovative approach to develop multi-wavelength all solid-state organic lasers.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Optics
Zhao Yuanyuan, Luo Haichao, Liang Zixin, Deng Mingjie, Duan Xuanming
Summary: Micro-nano 3D printing based on photopolymerization has significant advantages in manufacturing high-precision and complex micro-nanostructures, and has huge industrial application needs in various fields. The research and development of micro-nano 3D printing technology has received widespread attention and is considered one of the most frontier advanced manufacturing fields in the world.
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG
(2022)
Article
Engineering, Electrical & Electronic
Zhou Ziyi, Dong Xianzi, Zheng Meiling
Summary: This paper provides a detailed introduction to the optical projection lithography based on digital micromirror devices, emphasizing the strategies for improving resolution and breaking the optical diffraction limit, as well as discussing the unique advantages of this technology in micro devices and novel processing fields.
LASER & OPTOELECTRONICS PROGRESS
(2022)
Article
Engineering, Electrical & Electronic
Liang Zixin, Zhao Yuanyuan, Duan Xuanming
Summary: This article introduces the complexity and cost of current photolithography technology used in the semiconductor industry, and proposes the need for lithography methods that break the diffraction limit. It discusses the principles and methods of super-diffraction lithography technology, reviews the progress and current status of laser super-diffraction lithography, and discusses the existing problems and prospects for future development.
LASER & OPTOELECTRONICS PROGRESS
(2022)
