Article
Multidisciplinary Sciences
Byeong-Yoon Go, Changhyoup Lee, Kwang-Geol Lee
Summary: This study examines a quantum-enhanced differential measurement scheme using quantum probes and single-photon detectors to measure a minute defect in the absorption parameter of an analyte. The research compares the signal-to-noise ratios (SNRs) of different probe states with a classical imaging scheme and considers typical system imperfections. The study shows that quantum enhancement can be described by specific parameters and can be further improved.
SCIENTIFIC REPORTS
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Scott Dow, Adrian Howansky, Anthony R. Lubinsky, Wei Zhao
Summary: A new analytical framework is proposed to compute and evaluate the DQE performance of EIDs from single X-ray image ensembles, improving the understanding of X-ray imaging systems.
Article
Radiology, Nuclear Medicine & Medical Imaging
Magdalena Dobrzynska, Anna Wysocka-Rabin, Ewa Fabiszewska, Katarzyna Pasicz, Witold Skrzynski
Summary: This study introduces a new software that calculates detective quantum efficiency (DQE) fully compliant with the IEC 62220-1-2 standard. The software, developed using Python, contains modules for inverse conversion function, modulation transfer function (MTF), noise power spectrum (NPS), and DQE calculations, and is user-friendly with a graphical user interface (GUI). The software was validated through testing with DICOM images and comparison with other freely available programs.
JOURNAL OF DIGITAL IMAGING
(2022)
Article
Instruments & Instrumentation
Kento Tabata, Ryota Ohtake, Katsuyuki Takagi, Shailendra Singh, Toru Aoki
Summary: A high-spatial-resolution scintillator-type X-ray detection system with a silicon separator was developed in this study to improve resolution. Indicators for enhancing image detection performance of the silicon separator were obtained through X-ray irradiation experiments and image quality evaluations.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Engineering, Aerospace
Gregory R. Zengilowski, Craig W. McMurtry, Judith L. Pipher, Nicholas S. Reilly, Meghan L. Dorn, Amy K. Mainzer, Andre F. Wong, Lennon Reinhart, Trent Newswander, Ryan Luder
Summary: The modulation transfer function (MTF) is a useful measure for image quality analysis and performance budget determination. This paper presents a modified slanted edge method for determining the MTF in high dark current pixel LWIR detectors for astronomical space telescopes, specifically for the Near-Earth Object Surveyor Mission.
JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Nikta Zarif Yussefian, Jesse Tanguay
Summary: This paper presents a method for experimental analysis of the DQE of SXDs, including the task-based DQE and task-independent DQE. The authors developed a framework to measure the frequency-dependent DQE and showed that it can be measured using existing IEC methods. The results demonstrate a linear relationship between the task-based DQEs and the task-independent DQE.
Article
Optics
Wen-Jie Zhang, Yuchi Zhang, Qi Guo, A-Peng Liu, Gang Li, Tiancai Zhang
Summary: The introduction of an auxiliary cavity enhances steady-state mechanical squeezing and optomechanical entanglement, breaking the 3 dB limit in the resolved-sideband regime. Enhanced entanglement can be achieved in the unresolved-sideband regime, with strong robustness against thermal noise.
Article
Astronomy & Astrophysics
Dimitris Moustos
Summary: In this study, we consider an Unruh-DeWitt detector modeled as a harmonic oscillator coupled to a massless quantum scalar field in (2+1)-dimensional Minkowski spacetime. We find that the dissipation rate and frequency shift of the accelerated detector depend on the acceleration temperature, which is contrary to the cases of inertial motion in a heat bath and other analogous quantum Brownian motion models in open systems.
Article
Engineering, Electrical & Electronic
Wang Gengyun, Xie Lili, Bu Hongbo
Summary: This paper examines the MTF and SNR of CMOS image sensor pixels, finding that the modulation transfer function is fixed at 0.67 at Nyquist frequency, the peak quantum efficiency is 85.8% at 800 nm incident light wavelength, and the peak signal-to-noise ratio is 124 under the same reading noise and dark current.
LASER & OPTOELECTRONICS PROGRESS
(2021)
Article
Materials Science, Multidisciplinary
Zhaohui Huang, Enzhi Zhao, Ping Qi, Aixin Song
Summary: Organic-inorganic metal halides are a promising class of materials with diverse structures and attractive optical properties. In this study, two luminescent metal halides, [AVIm](3)SbCl6 and [AVIm](3)SbBr6, were investigated for their emission properties and the effect of halogen ligands. It was found that the change from Cl- to Br- resulted in different emission colors and shorter luminescence lifetime of [AVIm](3)SbBr6. The superior photophysical performances and stability of [AVIm](3)SbCl6 make it a suitable phosphor for WLED devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Quantum Science & Technology
Joseph A. Valery, Shoumik Chowdhury, Glenn Jones, Nicolas Didier
Summary: By using two-tone flux modulation, a continuum of dynamical sweet spots can be created, greatly expanding the range of achievable qubit frequencies while maintaining robustness against slow flux noise.
Article
Engineering, Biomedical
Dong Sik Kim
Summary: In this paper, a novel dual-layer detector is proposed to acquire X-ray images with high SNR and DQE, especially for high voltages of X-ray tubes. The upper and lower detector layers are aligned through an aligning procedure with minimized layer distance. The optimized convex combination of the images from the layers significantly increases the DQE values. Experimental results show that the aligned dual-layer detector efficiently enhances DQE values compared to single-layer cases.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2023)
Article
Optics
Felix Tebbenjohanns, Andrei Militaru, Andreas Norrman, Fons van der Laan, Lukas Novotny, Martin Frimmer
Summary: In this study, we propose and analyze an optimal measurement scheme for the angular degrees of freedom of an anisotropic scatterer with cylindrical symmetry. The scheme achieves the Heisenberg uncertainty limit and a realistic measurement scheme is proposed. It is shown that measurement-based groundstate cooling of the rotational degrees of freedom for an anisotropic point scatterer levitated in an optical trap is feasible in the absence of spinning motion around the symmetry axis.
Article
Physics, Multidisciplinary
Wang Ya-Jun, Wang Jun-Ping, Zhang Wen-Hui, Li Rui-Xin, Tian Long, Zheng Yao-Hui
Summary: Optical resonators can be used to suppress noise in optical fields by influencing the noise evolution characteristics of output signals. Different types of resonators have different impedance matching factors, which affect the transmission characteristics of noise. Over-coupled cavities play an important role in processing phase noise of light fields and frequency filtering.
ACTA PHYSICA SINICA
(2021)
Article
Energy & Fuels
Feng Wen, Chen Han, Wenhan Zhao, Kesong Ji, Zhoujian Chu
Summary: This paper presents a GIS switch state detection platform based on image recognition technology and wireless power transfer (WPT) technology, effectively addressing the difficulty of judging the switch state or defect type through manual observation. Through the analysis of the stability and anti-offset ability of the WPT system, the effectiveness of the proposed method is demonstrated.
Article
Microscopy
C. Gao, C. Hofer, T. J. Pennycook
Summary: Ptychography provides high dose efficiency images that can reveal light elements next to heavy atoms. However, contrast reversals can occur when the projected potential becomes strong. Recent research has shown that these reversals can be counteracted by adapting the focus. This study explains why the best contrast is often found with the probe focused to the middle of the sample and highlights the importance of convergence angle in thin samples to remove contrast reversals.
Article
Microscopy
J. Lindner, U. Ross, T. Meyer, V. Boureau, M. Seibt, Ch. Jooss
Summary: Phase-shifting electron holography is an excellent method with high phase sensitivity to reveal electron wave phase information. An advanced drift correction scheme is proposed in this study, which exploits the interface of the TEM specimen and the vacuum area in the hologram. This method allows for obtaining reliable phase information.
Article
Microscopy
Ali Jaberi, Nicolas Brodusch, Jun Song, Raynald Gauvin
Summary: This study investigates knock-on damage in lithium-ion batteries (LIBs) by computing threshold displacement energies (TDEs) and performing Monte Carlo simulation. The results indicate that Li is most sensitive to knock-on damage at moderate electron energies, and TDE is the principal parameter for assessing Li sensitivity to knock-on damage across similar structures.
Article
Microscopy
Alexander Schroeder, Christopher Rathje, Leon van Velzen, Maurits Kelder, Sascha Schaefer
Summary: This study utilizes novel event-based electron detector platforms to extend the temporal resolution of electron microscopy. By training a neural network to predict electron arrival time, the researchers were able to improve the timing accuracy and achieve a promising solution for enhancing electron timing precision in various electron microscopy applications.
Article
Microscopy
Avi Auslender, Nivedita Pandey, Amit Kohn, Oswaldo Dieguez
Summary: This article describes a faster implementation based on DFT for computing the mean inner potential of crystals, providing quantum-mechanical calculations beyond the independent-atom approximation. The study also reveals the dependence of the mean inner potential on sample boundary conditions, mass density, and magnetic susceptibility, highlighting its correlation with various material properties.
Article
Microscopy
Zhidong Yang, Dawei Zang, Hongjia Li, Zhao Zhang, Fa Zhang, Renmin Han
Summary: In this work, we propose a self-supervised deep learning model for cryo-ET volumetric image denoising based on noise modeling and sparsity guidance. Experimental results demonstrate that our method can achieve reliable denoising by training on single noisy volume and outperform existing methods.
Article
Microscopy
J. Kuttruff, J. Holder, Y. Meng, P. Baum
Summary: In this study, a robust clustering algorithm is proposed that can find clusters in a continuous stream of raw data in real time. This algorithm converts pixel hits measured by hybrid pixel detectors to real single-electron events. By continuously comparing with previous hits, the algorithm efficiently identifies the merging of new and old events.
Article
Microscopy
D. G. Senturk, C. P. Yu, A. De Backer, S. Van Aert
Summary: This article presents a statistics-based method for accurately counting the number of atoms in nanostructures, especially for images acquired with low electron doses and multiple element structures.
Article
Microscopy
Mauricio J. Prieto, Lucas de Souza Caldas, Liviu C. Tanase, Thomas Schmidt, Oscar Rodriguez de la Fuente
Summary: This study presents a synchrotron-based investigation of the synthesis process of a magnetite/hematite bilayer. Ion bombardment gradually transforms hematite into magnetite, and the growth of magnetite leads to the formation of stable boundaries. These findings are significant for understanding novel oxide heterostructures.
Article
Microscopy
Emre Yoruk, Holger Klein, Stephanie Kodjikian
Summary: Beam sensitive nanomaterials pose challenges for crystallographic structure determination. A dose symmetric electron diffraction tomography (DS-EDT) method is developed to reduce beam damage and obtain complete data sets by merging individual datasets from multiple crystals.
Article
Microscopy
A. Pofelski, Y. Zhu, G. A. Botton
Summary: The precision and sensitivity of the GPA method for strain characterization is a widely discussed topic. This study introduces the concept of phase noise and analyzes the parameter of sampling to improve the precision of GPA. Experimental and theoretical results demonstrate that using a larger pixel spacing in STEM can enhance the precision and sensitivity of the GPA method.
Article
Microscopy
Sangjun Kang, Di Wang, Christian Kuebel, Xiaoke Mu
Summary: Transmission electron microscopy is a valuable tool for assessing strain fields within materials. However, using thin specimens in TEM analysis can affect atomic configuration and deformation structure.