Article
Engineering, Electrical & Electronic
Hongtu Cheng, Ju Tang, Yin Zhang, Xiaoxing Zhang, Fuping Zeng
Summary: This study analyzed the influence of the focal length of the convex lens, the distance between the convex lens and the PA cell window, and the distance between the convex lens and the laser head on the intensity of photoacoustic signals. The results showed that the strongest signals were obtained when the focal length was 20 mm, the distance between the convex lens and the PA cell window was 0 mm, and the distance between the convex lens and the laser head was 9 mm. The findings provide insights for improving the stability and sensitivity of PAS gas detection devices.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Analytical
Aihui Sun, Tingting Li, Tian Jin, Yaxi Li, Kai Li, Chaolong Song, Lei Xi
Summary: A novel acoustic standing wave aided multiparametric photoacoustic imaging flow cytometry system is proposed, which can accurately identify multiple types of cells and image and capture melanoma cells at a lowest concentration of 100 cells mL-1 in pure blood. The system shows great potential for precise and efficient cell detection, manipulation, and elimination in both fundamental and clinical studies.
ANALYTICAL CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Jiaxuan Li, Weiqiang Zhu, Ettore Biondi, Zhongwen Zhan
Summary: Earthquake focal mechanisms are crucial for understanding subsurface faulting and stress state. The emerging DAS technology has the potential to fill in the incomplete azimuthal coverage of traditional seismic networks and improve constraints on the nodal plane orientation. However, determining first-arrival polarities on DAS is challenging due to its technical limitations.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Rui Cao, Jingjing Zhao, Lei Li, Lin Du, Yide Zhang, Yilin Luo, Laiming Jiang, Samuel Davis, Qifa Zhou, Adam de la Zerda, Lihong Wang
Summary: Optical-resolution photoacoustic microscopy can visualize wavelength-dependent optical absorption at the cellular level. However, it has a limited depth of field. To overcome this limitation, needle-shaped beam photoacoustic microscopy is proposed. This approach extends the depth of field and provides new perspectives for slide-free intraoperative pathological imaging and in vivo organ-level imaging.
Article
Optics
Di Wang, Jin-Bo Xu, Rong-Ying Yuan, You-Ran Zhao, Chao Liu, Qiong-Hua Wang
Summary: This paper presents a high stability liquid lens with optical path modulation function, which has a structure with three annular anchoring layers to provide six anchored precision optical path modulation gears. The feasibility of this structure is verified by simulation and practice, and the liquid lens can achieve zoom imaging and optical path modulation.
Article
Engineering, Electrical & Electronic
Yang Cheng, Xi Wang, Yuandan Dong
Summary: This article proposes a wideband dual-polarized metal lens for millimeter-wave applications. The lens features adjustable focal length, reduced fabrication cost through metal 3-D printing technology, and phase compensation control. It supports different dual-polarized radiation and exhibits stable patterns and wide 3 dB gain bandwidth. Measurements demonstrate high peak gain and aperture efficiency, making it suitable for mm-wave wireless applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Physics, Applied
Wentian Chen, Chao Tao, Zizhong Hu, Xiaojun Liu
Summary: This study proposes a photoacoustic microscopy scheme based on an aspheric acoustic mirror group to achieve subwavelength resolution and enhance spatial isotropy.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
A. Prabhakara Rao, Saugata Sinha
Summary: The acoustic lens based reconstruction technique presented in this study can generate 2D PA images in real time with qualities comparable to algorithm based reconstruction techniques, potentially reducing the data acquisition requirements and computational/memory needs.
Article
Optics
Jiaying Xiao, Jinsheng Jiang, Jiaxi Zhang, Yongjun Wang, Bo Wang
Summary: The study of molecular photoacoustic endoscopic imaging in deep tissues is limited due to technical difficulties. In this work, a multimodal acoustic-resolution-based PAE system was set up to image the rabbit rectum and explore the potential of molecular PAE for deep-seated targets. The results show that the system has achieved high resolution and signal-to-noise ratio at an imaging depth of 1.4 cm, and can distinguish the rectum wall and indocyanine green.
Article
Biochemical Research Methods
Binggyang Liang, Shaomeng Wang, Fei Shen, Qing Huo Liu, Yubin Gong, Junjie Yao
Summary: This study investigated the impact of the human skull on photoacoustic wave propagation and PAT image reconstruction. Results showed that different transcranial PAT implementations were affected differently by the skull, with ring-shaped transducer array PACT showing better tolerance to the adverse effects.
BIOMEDICAL OPTICS EXPRESS
(2021)
Article
Acoustics
Shang Gao, Ryosuke Tsumura, Doua P. Vang, Keion Bisland, Keshuai Xu, Yasuyuki Tsunoi, Haichong K. Zhang
Summary: The research introduced a low-cost sensor actuation device to reduce the size and cost of AR-PAM while maintaining image quality. Through simulation and experimental evaluation, the low-cost delta configuration actuators demonstrated applicability for AR-PAMs, with advanced reconstruction algorithms compensating for actuator motion errors.
Article
Optics
Xiaohan Du, Camilo Florian, Craig B. Arnold
Summary: In this Letter, the authors introduce a fast and versatile variable focal system using a tunable acoustic gradient of index lens for multi-focal laser processing. They demonstrate its application in femtosecond laser-induced volumetric modification in glass and laser machining on both surfaces of a transparent glass slide.
Article
Acoustics
Jaeyub Hyun, H. Alicia Kim
Summary: This study develops a transient topology optimization formulation to design a planar acoustic lens effective for short-duration pulses, using a level-set method for optimal combination and distribution of two materials with a crisp interface. The design is based on transient acoustic responses calculated from a time-dependent acoustic model solved by the Newmark method, and a localizing time-window function is introduced to focus acoustic energy within a desired time range. The proposed method provides optimum design solutions for planar acoustic lenses and verifies their effectiveness through numerical investigations.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Chemistry, Analytical
Hai Bi, Chao Jing, Peter Hasch, Yuxiang Gong, Daniel Gerster, Johannes Barth, Joachim Reichert
Summary: By combining optical near-field technique, an analytical method has been developed to investigate single-molecule junctions in strong optical fields, enabling the understanding of chemical bonds, geometry, and intramolecular strain through multiparameter studies.
ANALYTICAL CHEMISTRY
(2021)
Article
Computer Science, Artificial Intelligence
Linh Nguyen, Markus Haltmeier, Richard Kowar, Ngoc Do
Summary: This paper studies the mathematical foundations of using variable sound speed in full-field photoacoustic tomography (PAT), and settles the uniqueness and stability of the problem. An exact inversion method using time-reversal is introduced, and its convergence is studied. The results demonstrate the suitability of both the full-field approach and the proposed time-reversal technique for high-resolution photoacoustic imaging.
SIAM JOURNAL ON IMAGING SCIENCES
(2022)
Article
Biochemical Research Methods
Heng Guo, Qin Wang, Weizhi Qi, Xun Sun, Bowen Ke, Lei Xi
JOURNAL OF BIOPHOTONICS
(2019)
Article
Physics, Applied
Yingdong Luo, Jinwu Yang, Xin Tu, Tianye Huang, Zhizhao Che, Chaolong Song
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Optics
Ruopeng Yan, Jinwu Yang, Yunran Yang, Xin Tu, Tianye Huang, Ming-Feng Ge, Yangjie Liu, Chaolong Song
Article
Optics
Xiang Zhao, Zhuo Cheng, Ming Zhu, Tianye Huang, Shuwen Zeng, Jianxing Pan, Chaolong Song, Yuhan Wang, Perry Ping Shum
Article
Engineering, Electrical & Electronic
Chaolong Song, Yuxuan Yang, Xin Tu, Zhe Chen, Jing Gong, Congyao Lin
Summary: A handheld smartphone-based fluorescence microscope was developed for easy detection of glucose concentration, enabling early diagnosis of diabetes. The technology has advantages of low cost, portability, and high detection sensitivity.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Xin Tu, Wansheng Xie, Zhenmin Chen, Ming-Feng Ge, Tianye Huang, Chaolong Song, H. Y. Fu
Summary: By utilizing deep neural networks and finite-difference time-domain solver, efficient design of silicon photonic devices can be achieved; the study shows that both forward and inverse design methods can result in high prediction accuracy for the coupler, reaching up to 91.7%.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Review
Chemistry, Analytical
Xinqi Zheng, Xiudong Duan, Xin Tu, Shulan Jiang, Chaolong Song
Summary: Microalgae play crucial roles in food, agriculture, and medicine industries, with potential as a renewable energy source. Current technologies for microalgae detection and analysis are costly and limited, leading to the emergence of microfluidic chips with optical components. These optofluidic systems offer high specificity, sensitivity, and throughput for microalgae analysis, promising advancements in research and development.
Article
Chemistry, Analytical
Chaolong Song, Zhe Chen, Xinqi Zheng, Shimin Yang, Xiudong Duan, Yongguang Jiang, Xin Tu, Jinqiang Gan, Shulan Jiang
Summary: A simple and cost-effective method using digital in-line holographic flow cytometry was proposed to measure the growth characteristics of Haematococcus pluvialis in a microfluidic chip. The modified angular spectrum method and digitally extended depth-of-focus of the imaging system were utilized to accurately measure the biomass, morphology, and size of H. pluvialis.
ANALYTICAL CHEMISTRY
(2022)
Article
Energy & Fuels
Xiaogang Dong, Jinqiang Gan, Hao Wu, Changchang Deng, Sisheng Liu, Chaolong Song
Summary: This paper investigates the secondary control problems of AC microgrids with constrained physical states. A distributed secondary control algorithm based on model predictive control (MPC) is proposed to solve the problems of voltage and frequency recovery and power allocation. The algorithm also incorporates rolling optimization and self-triggered control mechanisms to reduce communication cost and control complexity. The stability and effectiveness of the algorithm are verified through theoretical derivation and simulation.
Article
Nanoscience & Nanotechnology
Xin Tu, Jianjun Wang, Yunran Yang, Ruopeng Yan, Xiudong Duan, Chaolong Song
Summary: This paper introduces a novel chemical microreactor with a tunable optofluidic Y-branch waveguide for monitoring sucrose hydrolysis reaction. The use of this integrated optofluidic device has shown great potential for chemical reaction monitoring and quantification of molecular interactions.
MICROFLUIDICS AND NANOFLUIDICS
(2022)
Article
Engineering, Electrical & Electronic
Xiudong Duan, Bin Xu, Xinqi Zheng, Zhou Zheng, Yingdong Luo, Xingyue Liu, Xin Tu, Chaolong Song
Summary: This article presents a digital holography-based technique for on- chip measurement and visualization of magnetic field distribution, providing a solution to the challenge of determining the real field distribution within microchips with high precision using conventional magnetometers.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Analytical
Yingdong Luo, Zhou Zheng, Xinqi Zheng, Yani Li, Zhizhao Che, Jiakun Fang, Lei Xi, Nam-Trung Nguyen, Chaolong Song
Summary: Droplet-based microfluidics has become a powerful tool for high-throughput assays in various fields. The precise and effective generation of droplets is crucial for practical applications. This study proposes and demonstrates a new method for on-demand droplet generation, using a model-based feedback control system with a dual-pressure-pulse (DPP) driving mechanism.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Automation & Control Systems
Xiudong Duan, Zhou Zheng, Yingdong Luo, Tianshu Dong, Yuanyuan Huang, Yani Li, Xin Tu, Chaolong Song
Summary: Droplet-based microfluidics is an emerging interdisciplinary field that has broad applications. This article proposes the usage of real-time quantitative phase imaging technique for the 3-D detection of flowing droplets to provide a precise measurement of droplet volume. Comparative experiments confirm that our proposed method offers higher accuracy and monodispersity of on-demand droplet generation, with enhanced stability and anti-interference. This method promises predictable outcomes in many microfluidics-based systems.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Biochemical Research Methods
Yingdong Luo, Yuanyuan Huang, Yani Li, Xiudong Duan, Yongguang Jiang, Cong Wang, Jiakun Fang, Lei Xi, Nam-Trung Nguyen, Chaolong Song
Summary: Biomolecular imaging is used for imaging and screening of intracellular structures of a single cell in metabolic engineering. However, current methods are limited to population-scale identification of cell phenotyping. To address this challenge, we propose to use dispersive phase microscopy combined with a droplet-based microfluidic system to achieve high-throughput screening of cells with an identified phenotype. The system has been validated for single-cell imaging and droplet manipulation, showing great potential for various biofactory scenarios.
Article
Biochemical Research Methods
Yingdong Luo, Jinwu Yang, Xinqi Zheng, Jianjun Wang, Xin Tu, Zhizhao Che, Jiakun Fang, Lei Xi, Nam-Trung Nguyen, Chaolong Song
Summary: Recent years have seen the development of droplet-based microfluidics as a valuable tool for high-throughput analysis in various scientific fields. Despite the challenges in real-time label-free quantitative inspection of flowing droplets in microchannels, a real-time quantitative phase microscopy technique has been proposed and demonstrated for 3-D visualization of droplets and measurement of analyte concentration distribution.
