A5050657991- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Plasmonic and Surface Plasmon Research
- Photonic Crystals and Applications
- Metamaterials and Metasurfaces Applications
- Atomic and Subatomic Physics Research
- Astro and Planetary Science
- Rare-earth and actinide compounds
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- High-pressure geophysics and materials
- Metallic Glasses and Amorphous Alloys
- Phase-change materials and chalcogenides
- Astronomical Observations and Instrumentation
- Theoretical and Computational Physics
- Strong Light-Matter Interactions
- Geophysics and Sensor Technology
- Paleopathology and ancient diseases
- Magnetic Field Sensors Techniques
- Smart Cities and Technologies
- Calibration and Measurement Techniques
- Cosmology and Gravitation Theories
- Geophysics and Gravity Measurements
Nanjing University
2019-2025
Collaborative Innovation Center of Advanced Microstructures
2020-2025
National Laboratory of Solid State Microstructures
2023-2025
University of Rome Tor Vergata
2023-2024
Chongqing Technology and Business University
2024
Beihua University
2023
University of Florida
2019-2021
Ministry of Education of the People's Republic of China
2019-2021
National Yang Ming Chiao Tung University
2021
ORCID
2020
Long-duration gamma-ray bursts (GRBs) are powerful cosmic explosions, signaling the death of massive stars. Among them, GRB 221009A is by far brightest burst ever observed. Because its enormous energy (Eiso ≈ 1055 erg) and proximity (z 0.15), an exceptionally rare event that pushes limits our theories. We present multiwavelength observations covering first 3 months afterglow evolution. The x-ray brightness decays as a power law with slope ≈t-1.66, which not consistent standard predictions...
Abstract The digital economy is an essential engine of the innovation-driven development strategy and plays a valuable role in promoting high-quality regional economy. Based on panel data 286 cities mainland China with help strategic plans issued by local governments as quasi-natural experiment, we use multi-temporal double-difference (DID) method to examine impact urban innovation level. Findings show that can significantly improve After series robustness tests, such parallel trend test,...
Abstract The recent launch of Einstein Probe (EP) in early 2024 opened up a new window onto the transient X-ray sky, allowing for real-time discovery and follow-up fast transients (FXRTs). Multiwavelength observations FXRTs their counterparts are key to characterize properties outflows and, ultimately, identify progenitors. Here, we report our long-term radio monitoring EP 240315A, long-lasting (∼1000 s) high-redshift ( z = 4.9) FXRT associated gamma-ray burst (GRB) 240315C. Our campaign,...
Abstract GRB 230307A is an extremely bright long-duration with observed gamma-ray fluence of ≳3 × 10 −3 erg cm −2 (10–1000 keV), second only to 221009A. Despite its long duration, it possibly associated a kilonova, thus resembling the case 211211A. In analogy 211211A, we distinguish three phases in prompt emission 230307A: initial short spectrally soft emission; main hard burst; and temporally extended tail. We interpret pulse as precursor burst compare properties models precursors from...
The brightest Gamma-ray burst, GRB 221009A, has spurred numerous theoretical investigations, with particular attention paid to the origins of ultra-high energy TeV photons during prompt phase. However, analyzing mechanism radiation in $\sim$MeV range been difficult because high flux causes pile-up and saturation effects most detectors. In this letter, we present systematic modeling time-resolved spectra using unsaturated data obtained from Fermi/GBM (precursor) SATech-01/GECAM-C (main...
Abstract The Einstein Probe (EP) achieved its first detection and localization of a bright X-ray flare, EP240219a, on 2024 February 19, during commissioning phase. Subsequent targeted searches triggered by the EP240219a alert identified faint, untriggered gamma-ray burst (GRB) in archived data Fermi Gamma-ray Burst Monitor (GBM), Swift Alert Telescope (BAT), Insight-HXMT/HE. EP Wide-field (WXT) light curve reveals long duration approximately 160 s with slow decay, whereas Fermi/GBM shows...
Abstract The giant flares of soft gamma-ray repeaters (SGRs) have long been proposed to contribute at least a subsample the observed short bursts (GRBs). In this paper, we perform comprehensive analysis high-energy data recent bright GRB 200415A, which was located close Sculptor galaxy. Our results suggest that magnetar flare provides most natural explanation for observational properties including its location, temporal and spectral features, energy, statistical correlations, emissions. On...
Abstract Active plasmonic nanostructures have attracted tremendous interest in nanophotonics and metamaterials owing to the dynamically switchable capabilities of resonances. In this study, tunable hybrid plasmon resonances (HPR) sodium metasurfaces through heat‐initiated structural transformation is experimentally demonstrated. A HPR formed by coupling surface polaritons (SPP) gap (GPR), whose resonant wavelengths are highly sensitive gaseous nanogaps. By carefully manipulating...
The early-stage ordering kinetics in ${\mathrm{Cu}}_{3}$Au has been investigated by situ time-resolved x-ray scattering. At temperatures above the first-order transition point, ${T}_{\mathrm{tr}}$, short-range order fluctuations reeequilibrate a few seconds after quench from high temperature. just below ${T}_{\mathrm{tr}}$ relax to metastable state which then decays relatively slow nucleation and growth. lower temperatures, time scales of two processes become similar. becomes continuous well...
The Chinese CubeSat Mission, Gamma Ray Integrated Detectors (GRID), recently detected its first gamma-ray burst, GRB 210121A, which was jointly observed by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM). This burst is confirmed several other missions, including \fermi and \textit{Insight}-HXMT. We combined multi-mission observational data performed a comprehensive analysis of burst's temporal spectral properties. Our results show that relatively...
Kilonovae are a novel class of astrophysical transients, and the only observationally-confirmed site rapid neutron capture nucleosynthesis (the r-process) in Universe. To date, handful kilonovae have been detected, with just single spectroscopically-observed event (AT 2017gfo). Spectra AT 2017gfo provided evidence for formation elements heavier than iron; however, these spectra were collected during first ~ 10 days, when emission from light r-process dominates observations. Heavier elements,...
Ground targets in complex environments demand adaptive camouflage that dynamically blends with the background. Conventional chromic materials often overlook radar wave absorption and infrared radiation reduction, compounded by rigidity constraints hinder large-area deployments. This study presents a composite material dynamic graphical control of color microwave/infrared stealth capabilities enabled electromagnetic metastructures. In visible spectrum (380-760 nm), transitions between deep...
Abstract GRB 211211A is a rare burst with genuinely long duration, yet its prominent kilonova association provides compelling evidence that this peculiar was the result of compact binary merger. However, exact nature merging objects, whether they were neutron star pairs, star–black hole systems, or star–white dwarf remains unsettled. This Letter delves into rarity event and possibility using current next-generation gravitational wave detectors to distinguish between various types systems....
Plasmonic colors are attracting attention for their subwavelength small size, vibrant hues, and environmental sustainability beyond traditional pigments while suffering from angular and/or polarization dependency due to distinct excitations of lattice resonances surface plasmon polaritons (SPPs). Here, we demonstrate the sodium metasurface-based plasmonic color palettes with polarization-independent wide-view angle (approximately >±60 deg in experiment up ±90 theory) single-particle-level...
In situ studies of the isothermal crystallization an amorphous alloy (Ni${\mathrm{Zr}}_{2}$) have been performed using time-resolved x-ray diffraction, with a time resolution as short 3 ms. temperature range studied (628-680 K), transient structural precursor is present during crystallization. The maximum volume fraction reached by this increases rate
Kilonovae are a rare class of astrophysical transients powered by the radioactive decay nuclei heavier than iron, synthesized in merger two compact objects. Over first few days, kilonova evolution is dominated large number isotopes contributing to heating rate. On timescales weeks months, its behavior predicted differ depending on ejecta composition and remnant. However, late-time observations known kilonovae either missing or limited. Here we report luminous red transient with quasi-thermal...
Optical filters have aroused tremendous excitement in advanced photonic instruments and modern digital displays due to their flexible capability of spectrum manipulation. Plasmonic metasurfaces narrow bandwidth, high spectral contrast, robust structure tolerance are highly desired for optical filtration (especially the visible regime) but rather challenging as large broadening from intrinsic ohmic loss design/fabrication deviations. Here high-performing sodium-based demonstrated across 450...
Abstract Plasmonic nanostructures have garnered tremendous interest in enhanced light–matter interaction because of their unique capability extreme field confinement nanoscale, especially beneficial for boosting the photoluminescence (PL) signals weak materials such as transition metal dichalcogenides atomic crystals. Here we report surface plasmon polariton (SPP)-assisted PL enhancement MoS 2 monolayer via a suspended periodic metallic (SPM) structure. Without involving nanoparticle–based...
Abstract We performed a systematic search for X-ray bursts of the SGR J1935+2154 using Fermi Gamma-ray Burst Monitor continuous data dated from 2013 January to 2021 October. Eight bursting phases, which consist total 353 individual bursts, are identified. further analyze periodic properties our sample Lomb–Scargle periodogram. The result suggests that those exhibit period ∼238 days with ∼63.2% duty cycle. Based on analysis, we predict two upcoming active windows bursts. Since July, beginning...
We have studied the crystallization of amorphous ${\mathrm{NiZr}}_{2}$, using time-resolved x-ray scattering, for times varying from several minutes to tens milliseconds. At relatively low temperatures, where kinetics transformation are slow, equilibrium ${\mathrm{NiZr}}_{2}$ phase occurs by time-dependent nucleation and growth. As temperature is increased, an ever greater fraction a transient metastable crystal formed, before reached. believe that in fact precursor formation at all...