Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
In this paper, we present a laser source designed specifically for time- and angle-resolved photoemission spectroscopy (TR-ARPES) investigations of light-induced electron dynamics in quantum materials. Our laser source is based on a ytterbium-doped laser that seeds an optical parametric amplifier (OPA) followed by a difference frequency generation (DFG) stage. This configuration enables the generation of tunable near-infrared and mid-infrared laser pulses (1.5 to 8 μm - 0.82 to 0.15 eV) at 250 kHz of repetition rate, serving as the pump for TR-ARPES measurements. The remaining energy of the laser is used to generate the ultraviolet 6 eV probe pulses, which prompt the material to emit photoelectrons. We demonstrate the long-term stability of the source, as well as the characterization of the beam profiles and pulse durations. Additionally, we present preliminary TR-ARPES results obtained on BiTe, a prototypical 3D topological insulator. This paper illustrates the capability of our laser source to probe electronic dynamics in quantum materials.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.525265 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spectroscopy and Theory of Acetylene Coupling Reactions in Ti(CH) Complexes.
J Phys Chem A
September 2025
Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States.
Ti(CH) complexes produced by laser vaporization in a supersonic expansion are investigated with mass spectrometry, infrared laser photodissociation spectroscopy, and UV laser photodissociation. The mass distributions of the cluster ions produced are found to vary significantly with the sample rod mounting configuration in the source. For infrared spectroscopy experiments, the so-called "offset" rod mounting produces colder conditions than the "cutaway" configuration, which allows tagging the ions with one or more argon atoms for the = 1 and 2 complexes.
View Article and Find Full Text PDFAccuracy of PEARL-DGS Formula for Intraocular Lens Power Calculation in Patients With Previous Myopic Laser Vision Correction.
J Refract Surg
September 2025
From the Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy.
Purpose: To determine the accuracy of a new machine learning-based open-source IOL formula (PEARLS-DGS) in 100 patients who underwent uncomplicated cataract surgery and had a history of laser refractive surgery for myopic defects.
Methods: The setting for this retrospective study was HUMANITAS Research Hospital, Milan, Italy. Data from 100 patients with a history of photorefractive keratectomy or laser in situ keratomileusis were retrospectively analyzed to assess the accuracy of the formula.
Note: An Integrated Miniature Time-of-Flight Mass Spectrometer System with 3D Printing Assisted Design of Versatile Pocket-Size Laser-Induced Acoustic Desorption Source.
J Am Soc Mass Spectrom
September 2025
Anhui Province Key Laboratory for Control and Applications of Optoelectronic Information Materials, School of Physics and Electronic Information, Anhui Normal University, Wuhu, Anhui 241000, China.
An integrated miniature time-of-flight mass spectrometer (TOF-MS) system coupled with a pocket-size 3D-printed laser-induced acoustic desorption (LIAD) source is described. This 3D-printed LIAD source utilizes only a miniature deceleration motor to achieve two-dimensional motion of the target surface, simplifying the source structure and improving the long-term stability of mass spectrometry measurements. It has been successfully applied to analyze the model molecule creatinine and ingredients in an energy beverage (Red Bull), where main natural nutrients were clearly identified.
View Article and Find Full Text PDFComparison of clinical manifestations, antimicrobial susceptibility patterns, and carbapenem resistance determinants between Acinetobacter seifertii and Acinetobacter nosocomialis isolated in Taiwan.
J Microbiol Immunol Infect
August 2025
Division of Infectious Diseases and Tropical Medicine, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan. Electronic address:
Background: Acinetobacter seifertii, a recently identified member of the Acinetobacter calcoaceticus-Acinetobacter baumannii (Acb) complex, has emerged as a cause of severe human infections. It is closely related to Acinetobacter nosocomialis, a major pathogen of the Acb complex. Here, we aimed to explore the clinical and molecular differences between these two species.
View Article and Find Full Text PDFGerm-Specific Triacylglycerols as Potential Biomarkers for Authenticating Zhongzi Purple Rice, a Cultivar Recognized for Its Nutritional Value.
J Am Soc Mass Spectrom
September 2025
Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Zhongzi purple rice is recognized as a nutritionally superior whole-grain variety, containing higher levels of protein, iron, dietary fiber, and vitamin B6 compared to conventional rice. While the nutritional profile of Zhongzi purple rice is well-established, the spatial distribution and structural specificity of its lipid components, especially germ-specific triacylglycerols (TAGs), remain poorly characterized. This study employs a multimodal mass spectrometric strategy to investigate the lipidomic uniqueness of the Zhongzi purple rice.
View Article and Find Full Text PDF