A5101639486- Superconducting and THz Device Technology
- Physics of Superconductivity and Magnetism
- Superconducting Materials and Applications
- Silicon Carbide Semiconductor Technologies
- Astronomical Observations and Instrumentation
- Advanced Electrical Measurement Techniques
- Semiconductor Quantum Structures and Devices
- Gamma-ray bursts and supernovae
- Thermal Radiation and Cooling Technologies
- Geophysics and Gravity Measurements
- Radio Astronomy Observations and Technology
- Advanced Thermodynamic Systems and Engines
- Acoustic Wave Resonator Technologies
- GaN-based semiconductor devices and materials
- Engineering Applied Research
- Particle accelerators and beam dynamics
- Ultrasound Imaging and Elastography
- Advanced Sensor Technologies Research
- Photonic and Optical Devices
- Superconductivity in MgB2 and Alloys
- Surface and Thin Film Phenomena
- Advanced Thermodynamics and Statistical Mechanics
- Ultrasonics and Acoustic Wave Propagation
Tsinghua University
2020-2022
University of Chinese Academy of Sciences
2020-2021
Beijing Normal University
2020
System Simulation (United Kingdom)
2020
Shanghai Institute of Microsystem and Information Technology
2020
State Key Laboratory of Transducer Technology
2020
We proposed a new pre-concave membrane piezoelectric micro-machined ultrasonic transducer (PMUT), which is presented with highest quality factor as 600 in air coupling. Surface micromachining process used for fabrication and AlN chosen material, makes compatible Pre-CMOS fabrication. It has been proved that non-flat better coupling others' previous work. In this design, we also use sealed cavities molybdenum electrodes to further improve the device performance. 9 different radii of PMUT...
Hot Universe Baryon Surveyor (HUBS) is a proposed space-borne observatory for X-ray astronomy. The primary scientific objectives of the mission are to fill void in probing ecosystem galaxies and thus advance our understanding galaxy formation evolution, which fundamental importance cosmology. More specifically, HUBS aims at directly detecting soft emission from diffuse gas temperature exceeding 106 K, theoretically postulated permeate large structures cosmic web also extended halo galaxies....
In this paper, we present a novel piezoelectric micromachined ultrasonic transducer (PMUT) array with high fill factor and large quality (Q).With the reusable design of etching holes, pitch between PMUTs is effectively minimized, improving array.With newly developed surface micromachining process, fabricated PMUT only needs few holes to release structure, all sealed are removed from resonance region, achieving Q.The demonstrated process facilitates low-cost volume manufacturing.As result, 50...
Hot Universe Baryon Surveyor (HUBS)<sup>1</sup> is being conceptualized in China as a high throughput and highresolution spectroscopic X-ray mission dedicated to studying cosmic "missing" baryons, which are thought exist the gas of very low density temperature roughly one million degrees halo galaxies or large-scale structures. To detect weak emission from HUBS will employ an microcalorimeter based on transition-edge sensors (TES) array that operates at temperatures. The key characteristics...
Abstract In the process of minimizing stress in sputtered molybdenum (Mo) films for fabricating transition-edge sensor devices, we have investigated correlations between and film deposition parameters. At a fixed sputtering power, tensile our samples decreases toward both low high ends Ar pressure, suggestive two physical mechanisms at work: an ‘atomic peening’ effect pressure development voids pressure. We also carried out correlative studies electrical properties (including superconducting...
The Hot Universe Baryon Surveyor (HUBS) is a satellite concept proposed in China to address the so-called "missing baryon problem", which has serious implications on formation and evolution of galaxies. At heart HUBS there high-resolution soft X Ray spectrometer based transition-edge sensors operating below 100 mK. A cooling system needed provide such low-temperature environment. It necessarily consists precooling stage cold stage. could be enabled by an adiabatic demagnetization...
Abstract Based on measurements over a period of more than 650 days, we investigated the long-term stability superconducting Mo–Cu bilayer films in laboratory environment. The samples are based sputtered films, which were grown for fabricating transition-edge sensor (TES) arrays. results show an increasing trend their transition temperature ( <?CDATA $T_\textrm{c}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mi>T</mml:mi> <mml:mrow>...
Abstract The superconducting microcalorimeter provides astronomers with a new tool to probe the hot universe. This kind of detectors has superb energy resolution and high detection efficiency, which is important for diffuse X-ray detection. Astronomy missions, such as Hot Universe Baryon Surveyor (HUBS) Diffuse explorer (DIXE) proposed in China, going employ microcalorimeters. works its transition region, at very low temperature(<100 mK). Realization temperature space challenging....
The Hot Universe Baryon Surveyor (HUBS) is a satellite mission that proposed to probe "hidden" baryons in the universe and thus fill void observational astronomy seriously affects our understand of galaxy formation evolution. HUBS payload highly optimized for detecting diffuse X-ray emission from baryons, with combination large field view high spectral resolution. To assess scientific capabilities HUBS, we created mock observations data state-of-the-art cosmological hydrodynamical simulation...