A5054061272- Laser-Matter Interactions and Applications
- Advanced Chemical Physics Studies
- Polymer composites and self-healing
- Mass Spectrometry Techniques and Applications
- Advanced Fiber Laser Technologies
- Polymer Surface Interaction Studies
- Atomic and Molecular Physics
- Ion-surface interactions and analysis
- Luminescence and Fluorescent Materials
- Photochromic and Fluorescence Chemistry
- Orbital Angular Momentum in Optics
- Spectroscopy and Quantum Chemical Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Polymer Nanocomposites and Properties
- Stellar, planetary, and galactic studies
- Quantum Chromodynamics and Particle Interactions
- Force Microscopy Techniques and Applications
- Particle physics theoretical and experimental studies
- Electron and X-Ray Spectroscopy Techniques
- Conducting polymers and applications
- High-Energy Particle Collisions Research
- Surface Modification and Superhydrophobicity
- Astronomy and Astrophysical Research
- Flame retardant materials and properties
- Silicone and Siloxane Chemistry
Helmholtz Institute Jena
2020-2024
China Academy of Engineering Physics
2021-2024
Friedrich Schiller University Jena
2019-2024
Institute of Modern Physics
2015-2022
Chinese Academy of Sciences
2014-2022
Instituto de Óptica "Daza de Valdés"
2020
Fudan University
2015-2017
University of Chinese Academy of Sciences
2014
Shanghai Advanced Research Institute
2014
To meet the demand of sustainable development, epoxy vitrimers based on dynamic transesterification reaction (DTER) have received considerable attention recently due to their reprocessability and repairability. However, they suffer from low mechanical strength rely heavily external catalysts ensure curing repair. Herein, we report a facile design novel ZnAl-LDH-catalyzed vitrimer nanocomposite via introducing ZnAl-layered double metal hydroxide (ZnAl-LDH) nanosheets. Our results show that...
Mechanochromic polymers exhibit potential applications in damage reporting and stress sensing. Despite the rapid progress achieved recent years, mechanochromic structural polymers, such as epoxy thermosets, remain difficult to develop, let alone materials that can distinguish different levels of by a visual color change. This work presents new class multicolor thermosets discriminate between low high compressive stresses via incorporation two distinct mechanophores. Amino-functionalized...
Above-threshold ionization spectra from cesium are measured as a function of the carrier-envelope phase (CEP) using laser pulses centered at $3.1\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$ wavelength. The directional asymmetry in energy backscattered electrons oscillates three times, rather than once, CEP is changed 0 to $2\ensuremath{\pi}$. Using improved strong-field approximation, we show that unusual behavior arises interference few quantum orbits. We discuss conditions for observing...
High-harmonic generation (HHG) in crystals offers a simple, affordable and easily accessible route to carrier-envelope phase (CEP) measurements, which scales favorably towards longer wavelengths. We present measurements of HHG ZnO using few-cycle pulses at 3.1µm. Thanks the broad bandwidth driving laser pulses, spectral overlap between adjacent harmonic orders is achieved. The resulting interference pattern provides access relative phase, hence, CEP.
The formation of the interfacial adhesion between an epoxy adhesive and a substrate was normally accompanied by curing process on substrate. Although debate mechanism is still ongoing, this issue can causally be resolved studying structural Herein, to reveal representative formula composed (digylcidyl ether biphenyl A, DGEBA) amine hardener (2,2'-(ethylenedioxy) diethylamine, EDDA) with steel upon postcuring treatments, sum-frequency generation (SFG) vibrational spectroscopy sandwiched...
Bonding is widely used in aircraft and vehicles due to its light weight simple process, but strength decreases sharply hot humid environments. Anodization treatment, for enhancing aging performance, environmentally harmful unsuitable steel. In this study, a catechol-modified epoxy adhesive (CMEA) was prepared on hectogram scale. Comparative analysis with phenol-modified (PMEA) pristine (EA) revealed that the underwater bonding of CMEA (13.0 MPa) stainless steel (SS) significantly...
The spatially dependent phase distribution of focused few-cycle pulses, i.e., the focal phase, is much more complex than well-known Gouy monochromatic beams. As imprinted on carrier-envelope (CEP), for accurate modeling and interpretation CEP-dependent laser-matter interactions, both coupled intensity distributions must be taken into account. In this Letter, we demonstrate significance effect via comparison measurements simulations photoelectron spectra. Moreover, impact light-matter...
By applying recently introduced, phase-of-the-phase spectroscopy [S. Skruszewicz et al., Phys. Rev. Lett. 115, 043001 (2015)], we analyze the phase-dependent photoelectron signal from Xe ionized in intense, parallel, two-color (1800 nm and 900 nm) laser fields. With such a field configuration, tuning of relative phase between ionizing, $\ensuremath{\omega}$, perturbative, $2\ensuremath{\omega}$, results modulation ionization rate, as well modifications trajectories electrons propagating...
Many applications ranging from nonlinear optics to material processing would benefit pulsed ultrashort (quasi-)non-diffracting Gauss-Bessel beams (GBBs). Here we demonstrate a straightforward yet efficient method for generating such zeroth- and first-order GBBs using single reflective spatial light modulator. Even in the sub-8-fs range there are no noticeable consequences measured pulse duration. The only effect is weak "coloring" of outer-lying satellite rings due spectrum spanning over...
A high-precision, single-shot, and real-time carrier-envelope phase (CEP) measurement at 1.8 μm laser wavelength based on stereographic photoelectron spectroscopy is presented. precision of the CEP 120 mrad for each every individual shot a 1 kHz pulse train with randomly varying demonstrated. Simultaneous to measurement, lengths are characterized by evaluating spatial asymmetry measured above-threshold ionization (ATI) spectra xenon referenced standard pulse-duration frequency-resolved...
Dissociative single, double and triple ionization of N2 induced by fast electron impact are studied using the cold target recoil-ion momentum spectroscopy technique. Kinetic energy releases (KERs) determined possible states parent ions analyzed for dissociation channels also Coulomb explosion As electron-impact increases, different behave quite differently. For example, KER spectra channel → N+ + N show that intensity low-KER part increases high-KER decrease, while seem to remain unchanged....
Abstract Multicolor mechanochromic polymers that can distinguish between different levels of stress indicated by color changes remain difficult to develop. This work reports a versatile strategy construct epoxy thermosets exhibit multicolor switching via the incorporation two distinct mechanochromophores, rhodamine (Rh) and disulfide (DS), at finely tuned ratios. Owing mechanosensitivities components, relative populations activated Rh DS changed with compressive stress, as demonstrated solid...
Mechanochromic polymers that exhibit multiple color changes under external mechanical stimulation show great potential for sensor applications. Herein, an epoxy thermoset can reveal the intensity, type, and duration of via a combination disulfide (DS) rhodamine (Rh) mechanochromophores is reported. A unique multicolor transition occurs upon ball mill or manual grinding because different activation energies DS Rh. The depending on duration. Simultaneous with mechanochromic time lag between...
Strong-field ionization can induce electron motion in both the continuum and valence shell of parent ion. Here, we explore their interplay by studying laser-induced diffraction (LIED) patterns arising from interaction with potentials two-hole states xenon cation. The quantitative rescattering theory is used to calculate corresponding photoelectron momentum distributions, providing evidence that spin-orbit dynamics could be detected LIED. We identify contribution these time-evolving hole...
Strong-field ionization can induce electron motion in both the continuum and valence shell of parent ion. Here we report on a joint theoretical experimental investigation laser-induced diffraction xenon. We explore interplay recollision with spin-orbit dynamics xenon cation. On theory side, electron-hole potentials for two different states are constructed, quantitative rescattering model is used to calculate photoelectron momentum distributions (PMDs) high-order above-threshold Measurements...
The ever-increasing energy/power of modern laser sources is inevitably leading to new challenges and opportunities. One them the problem spectral broadening high-energy femtosecond pulses their subsequent compression in time in, e.g., filaments. At high beam/pulse intensities, these tend become unstable. way avoid such instabilities could be controllable splitting beam into sub-beams. This, however, only makes sense if there a reliable coherently recombine them. In this work, by using phase...
We have studied charge migration and dissociation in iodine-substituted methane molecules using extremely intense short 5.5 keV free electron laser pulses from the SACLA XFEL facility. Multiple core ionization down to I 2p subshells creates highly charged molecular states, fragmentation of which was by ion momentum imaging multiparticle coincidence technique. report experimental modeling results on various pathways, fragment correlations, kinetic energy releases.
Total recombination rate coefficients of 112Sn35+ ions have been firstly measured by employing the electron-ion merged-beams technique on main cooler storage ring at Lanzhou. Using an electron beam energy detuning system, we precisely tuned relative energies from 0 to 6.0 eV between and ion (momentum spread Δp/p ~ 5 × 10−4). A multi-configuration Breit-Pauli calculation utilizing kappa-averaged relativistic orbitals has carried-out for coefficients. We find that there are obvious differences...