We have developed an amplitude-division type Mach-Zehnder electron interferometer (MZ-EI). The developed MZ-EI is composed of single crystals corresponding to amplitude-division beam splitters, lenses corresponding to mirrors and an objective aperture. The spacings and azimuth angles of interference fringes can be controlled by single crystal materials and their orientations and by diffraction spots selected by the objective aperture. We built the MZ-EI on a 1.2-MV field-emission transmission electron microscope and tested its performance. Results showed that interference fringes were created for various spacings and azimuth angles, which demonstrates the practicability of the MZ-EI as an amplitude-division type electron interferometer.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1093/jmicro/dfaa040 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The cross talk and power consumption of the 2 × 2 optical switch is a key metric in the design of large-scale photonic integrated circuits (PICs). We build a theoretical model of a 2 × 2 Mach-Zehnder interferometer (MZI) optical switch, taking into account both imbalances in the arm loss and the coupler splitting ratio. The splitting ratio imbalance requirement for a given switch cross talk is summarized, which provides a guideline for the switch design.
View Article and Find Full Text PDFPicometre-level surface control of a closed-loop, adaptive X-ray mirror with integrated real-time interferometric feedback.
J Synchrotron Radiat
January 2025
CAEN, Viareggio, Italy.
We provide a technical description and experimental results of the practical development and offline testing of an innovative, closed-loop, adaptive mirror system capable of making rapid, precise and ultra-stable changes in the size and shape of reflected X-ray beams generated at synchrotron light and free-electron laser facilities. The optical surface of a piezoelectric bimorph deformable mirror is continuously monitored at 20 kHz by an array of interferometric sensors. This matrix of height data is autonomously converted into voltage commands that are sent at 1 Hz to the piezo actuators to modify the shape of the mirror optical surface.
View Article and Find Full Text PDFConstraint on an Exotic Parity-Odd Spin- and Velocity-Dependent Interaction with Atom Interferometer.
Phys Rev Lett
November 2024
MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF, and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
Article Synopsis
- A high-precision test of the spin- and velocity-dependent (SVD) interaction between spin-polarized protons and unpolarized nucleons is conducted using a Bragg atom interferometer with ^{87}Rb atoms.
- The experiment enhances the precision of free fall measurements to 9.2×10^{-9}, significantly improving on earlier polarized atom experiments.
- It also provides a new constraint on the SVD interaction coupling, indicating greater sensitivity and opening new avenues for studying physics with polarized-atom interferometers.
Surface characteristics of resin composite cores and bond strength to CAD/CAM resin matrix glass-ceramic restorations after different treatment protocols.
Odontology
December 2024
Department of Occlusion, Fixed Prosthodontics and Dental Materials, School of Dentistry, Federal University of Uberlandia, Av. Pará, 1720, Bloco 4L, Anexo A, sala 4LA-42, Campus Umuarama, Uberlândia, Minas Gerais, 38405-320, Brazil.
The purpose of this study was to evaluate the impact of various mechanical surface treatments on the surface roughness and microtensile bond strength (µTBS) of aged composite resin cores bonded to CAD/CAM restorations. Composite resin specimens (Filtek Z350 XT, 3M-ESPE/Solventum) were thermally aged and subsequently divided into four groups (n = 36) according to surface treatments: UI-cleaning with ultrasonic diamond tip; AO-sandblasting with 50 µm AlO; DB-cleaning with diamond burs; and CG-positive control group, without aging or surface treatment. Surface roughness was assessed using a profilometer and interferometer, with measurements taken on both sides of each specimen (n = 12).
View Article and Find Full Text PDFRespiratory complex II acting as a homeostatic regulatory sensor.
Phys Chem Chem Phys
December 2024
Department of Basic Sciences, University of Health Sciences and Pharmacy, St. Louis, Missouri 63110, USA.
The succinate-ubiquinone oxidoreductase (SQR) complex connects two of the cell's most vital energy-producing metabolic processes: the tricarboxylic acid cycle and the electron transport chain. Hence, the SQR complex is essential in cell metabolism, and its malfunction leads to the progression of multiple metabolic disorders and other diseases, such as cancer. In the current study, we calculated the electron tunneling (ET) pathways between the different redox systems in the SQR complex, including the SQR ligands and the distant heme redox center, using the broken-symmetry semi-empirical ZINDO method.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!