Article
Physics, Multidisciplinary
Christian Dwyer
Summary: New-generation transmission electron microscopes (TEMs) have detectors that approach the shot-noise limit. This study explores the quantum limits of electron scattering experiments in TEMs and provides quantitative answers using quantum estimation theory. It shows that achieving the quantum limit is possible under conditions of weak scattering, but not strong multiple scattering. The implications for structure determination of radiation-sensitive materials are discussed.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Philjun Jeon, Jongwu Kim, Heejung Lee, Hyuk-Sang Kwon, Dug Young Kim
Summary: FINCH and SIM are two promising microscopy techniques for resolution enhancement. In this study, the combination of SIM and FINCH, known as SI-FINCH, was successfully applied to fluorescent microscopy, demonstrating resolution enhancements through comparisons of PSFs of different imaging systems.
Article
Chemistry, Multidisciplinary
Jong Chan Yoon, Zonghoon Lee, Gyeong Hee Ryu
Summary: The study reports the structural merging behavior and atomic arrangement of zinc oxide nanosheets transferred onto monolayer graphene, providing insights into atomic alignments and rearrangements when transitioning into a graphene-like layered structure.
Article
Multidisciplinary Sciences
Siewert Hugelier, Wim Vandenberg, Tomas Lukes, Kristin S. Grussmayer, Paul H. C. Eilers, Peter Dedecker, Cyril Ruckebusch
Summary: In this research, the use of Whittaker smoothing is proposed to enhance SOFI signals by correcting photodestruction, particularly when it occurs rapidly. This method results in higher contrast images, strongly suppressed background, and more detailed visualization of cellular structures. Additionally, it is parameter-free, computationally efficient, and applicable to both two-dimensional and three-dimensional data.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Zhaoxin Li, Fan Wang, Pengju Jin, Haoyang Zhang, Bin Feng, Rongli Guo
Summary: A precise method based on a data-driven phase aberrations compensations network is proposed to remove the effects of aberrations on quantitative phase images in digital holographic microscopy.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Chemistry, Physical
F. Giannazzo, S. E. Panasci, E. Schiliro, G. Greco, F. Roccaforte, G. Sfuncia, G. Nicotra, M. Cannas, S. Agnello, E. Frayssinet, Y. Cordier, A. Michon, A. Koos, B. Pecz
Summary: In this paper, the growth of ultrathin MoS2 films on homoepitaxial n(-)-GaN on n(+) bulk substrates was reported, which demonstrated highly uniform and conformal coverage of the GaN surface. The Raman mapping and electron microscopy analysis revealed the low tensile strain and p(+)-type doping of MoS2, and a nearly-ideal van der Waals interface between MoS2 and Ga-terminated GaN. The nanoscale current-voltage analysis showed a rectifying behavior at the 2D/3D heterojunction.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Sol Lee, Yangjin Lee, Li Ping Ding, Kihyun Lee, Feng Ding, Kwanpyo Kim
Summary: This research investigates the edge structures of bilayer phosphorene and discovers reconstruction behavior in edge configurations. Through experimental observation and computational analysis, the stability of closed bilayer zigzag edges under e-beam irradiation is confirmed. These findings are crucial for understanding the synthesis, degradation, reconstruction, and applications of phosphorene and related structures.
Article
Physics, Applied
Wangqiao Chen, Hanbo Jiang, Xun Huang
Summary: This work presents a super-resolution acoustic imaging method that can invert the distribution, strength, and structure of sources in three-dimensional space. By utilizing the nonlinear coupling process between a low-frequency sound field and a high-frequency plane wave, this method overcomes the resolution limit. The reconstructed results with different source strengths and frequencies demonstrate the effectiveness of the proposed method, particularly for low-frequency source imaging. This method enhances the super-resolution analysis capability of acoustic imaging tests and provides deeper physical insights into various propulsion systems in underwater and aerospace systems.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Jingyi Wang, Wu You, Yuheng Jiao, Xiaojun Liu, Xiangqian Jiang, Wenlong Lu
Summary: This paper proposes a rotation-free method for phase imaging, which can robustly reconstruct 2D phase information and has been successfully applied to different types of samples.
Article
Physics, Multidisciplinary
Zhong-Hua Qian, Zi-Han Ding, Ming-Zhong Ai, Yong-Xiang Zheng, Jin-Ming Cui, Yun-Feng Huang, Chuan-Feng Li, Guang-Can Guo
Summary: Bayesian optimization is proposed for phase retrieval, showing high accuracy for small aberration and insensitivity to initial phase for large aberration. The method's high accuracy and robustness make it promising for optical systems with static aberration.
CHINESE PHYSICS LETTERS
(2021)
Article
Physics, Applied
Faruk Krecinic, Ralph Ernstorfer
Summary: The coherence of electron sources has a significant impact on the imaging capabilities of modern electron microscopes. Conventional electron source models have limitations in dealing with highly coherent field-emission sources, leading to the development of models inspired by light optics treatments. By applying wave-mechanical electron optics, a physically consistent treatment of the wave-mechanical properties of electron sources can be achieved, which is crucial for improving spatial resolution limits in electron holography and microscopy.
PHYSICAL REVIEW APPLIED
(2021)
Article
Acoustics
Rehman Ali, Thurston Brevett, Dongwoon Hyun, Leandra L. Brickson, Jeremy J. Dahl
Summary: Phase aberration is a major cause of image degradation in ultrasound imaging. Traditional correction techniques are unable to handle distributed aberrations, but our proposed sound speed estimator and aberration correction techniques show promising results in improving image resolution and contrast.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Environmental Sciences
Chagai Levy, Monika Pinchas, Yosef Pinhasi
Summary: Phase noise causes instability in radar systems, affecting the accurate identification of target location and velocity. Nonstationary phase noise leads to significant degradation in time-frequency coherent integration for short-range moving targets, highlighting the importance of considering these effects in radar system design.
Article
Chemistry, Multidisciplinary
Yue Wang, Haoran Meng, Xinyue Liu, Jiahao Liu, Xu Cui
Summary: Parallel phase-shifting digital holography with a polarization image sensor can suppress noise and measure complex-valued dynamic objects in a single exposure, and has broad applications. We propose an oversampled super-pixel image reconstruction method to improve imaging resolution.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Yuxuan Qiu, Yuran Huang, Xin Liu, Yusen Zhang, Xiang Hao, Cuifang Kuang, Xu Liu
Summary: Modulated pattern scanning microscopy (MPSM) is proposed to achieve super-resolution imaging by modulating the phase of the illumination beam to reassign the effective optical transfer function (OTFeff) and obtain rich high-frequency components. Simulation and experiment show that MPSM improves the resolution approximately 1.3 times better than confocal microscopy and exhibits a higher signal-to-noise ratio compared to conventional deconvolution.
