A5100737675- Atomic and Molecular Physics
- Laser-induced spectroscopy and plasma
- Quantum and electron transport phenomena
- Orbital Angular Momentum in Optics
- Advanced Chemical Physics Studies
- Natural Language Processing Techniques
- Topic Modeling
- Spectroscopy and Laser Applications
- Metamaterials and Metasurfaces Applications
- Semiconductor Quantum Structures and Devices
- Physics of Superconductivity and Magnetism
- Semantic Web and Ontologies
- Plasmonic and Surface Plasmon Research
- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Quantum, superfluid, helium dynamics
- Mechanical and Optical Resonators
- Neural Networks and Applications
- Gas Dynamics and Kinetic Theory
- Laser Design and Applications
- Spectroscopy and Quantum Chemical Studies
- Microfluidic and Bio-sensing Technologies
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Cold Atom Physics and Bose-Einstein Condensates
Peking University
2022-2024
University of Science and Technology of China
2021-2023
Zhejiang University
2022
State Key Laboratory of Clean Energy Utilization
2022
East China University of Technology
2019-2022
Jilin University
2016-2019
Jilin Medical University
2016
Vortex beams, which intrinsically possess optical orbital angular momentum (OAM), are considered as one of the promising chiral light waves for classical communications and quantum information processing. For a long time, it has been an expectation to utilize artificial three-dimensional (3D) metamaterials manipulate transmission vortex beams practical display applications. Here, we demonstrate concept selective management with opposite OAM modes assisted by designed 3D metahelices....
We have investigated the low temperature <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mo>(</a:mo><a:mi>T</a:mi><a:mo>)</a:mo></a:math> transport properties of fractional quantum Hall (FQH) states in a high-mobility two-dimensional hole gas. According to composite fermion (CF) model, FQH stemming from half-filled Landau level, specifically at fillinsg factors <b:math...
Viscous fluid in an ultrahigh-mobility two-dimensional electron gas (2DEG) GaAs/AlGaAs quantum wells is systematically studied through measurements of negative magnetoresistance (NMR) and photoresistance under microwave radiation, the data are analyzed according to recent theoretical work by e.g., Alekseev, Physical Review Letters 117,166601 (2016). Size-dependent temperature dependent NMR found conform predictions. In particular, transport 2DEG with relatively weak Coulomb interaction...
Chiral oligomers in optics are photonic metamaterials inspired by the concept of chiral centers chemistry. In recent years, have attracted increasing attention years due to their simple construction and unique chiroptical response. To date, research has predominantly focused on spin angular momentum (SAM)-dependent response: circular dichroism (CD). However, for another dimension parallel SAM, orbital (OAM)-dominated response still remains elusive. Here, we theoretically experimentally...
Radiative lifetimes of 88 levels Tm I in the energy range 22 791.176–48 547.98 cm−1 and 29 II 27 294.79–65 612.85 were measured by time-resolved laser-induced fluorescence spectroscopy laser-ablation plasma. The lifetime values obtained are from 15.4 to 7900 ns for 36.5 1000 II. To best our knowledge, 77 reported first time. Good agreements between present results previous experimental achieved both
Prompting method is regarded as one of the crucial progress for few-shot nature language processing. Recent research on prompting moves from discrete tokens based ``hard prompts'' to continuous ``soft prompts'', which employ learnable vectors pseudo prompt and achieve better performance. Though showing promising prospects, these soft-prompting methods are observed rely heavily good initialization take effect. Unfortunately, obtaining a perfect soft prompts requires understanding inner models...
Abstract Chiroptical response, investigating the interaction between photonic angular momenta and chiral media, is widely applied in optics material science. In spin momentum (SAM) dimension, tailoring circular dichroism (CD) realized by varying metamaterials for compact polarizers enantiomer sensing. However, orbital (OAM) tailorable chiroptical property artificial at a fixed operating wavelength remains elusive. Here, it proposed demonstrated that twisted stereometamaterials can yield...
The astigmatic interferometric particle imaging (AIPI) model reveals that the fringe orientation shifts with droplet depth displacement, and their relationships are quantitatively formulated. displacement is directly evaluated from relative angular shift of fringes cross power spectral density, this algorithm isolates uncertainty position displacement. Proof-of-concept experiments on micrometer-sized transparent droplets a 5 kHz AIPI system demonstrates three-dimensional (3D) trajectories...
The complicated collisional processes inside a femtosecond laser-induced plasma column can show great impact on the light emissions from it. A known example is that lifetime of noncoherent fluorescence emitting gas be greatly decreased due to fierce ultrafast collisions. However, for coherent stimulated in surrounding, what extent it influenced by process has not been fully understood. Herein, we report an experimental spectral width analysis ${\mathrm{N}}_{2}^{+}$ lasing generated weakly...
Radiative lifetimes of 11 levels Eu II in the energy range 34 923.43–46 029.14 cm−1 and those six 4f65d configuration III from 39 636.88 to 42 530.91 were measured by time-resolved laser-induced fluorescence spectroscopy plasma. The obtained 33 760 ns. To our knowledge, for three are reported first time. Transition probabilities oscillator strengths 24 lines five relative studied derived combining with branching fractions emission spectrum a hollow cathode lamp.
ABSTRACT The branching fraction (BF) determinations were performed for 87 La i lines from 290.963 to 1078.646 nm based on the emission spectra of hollow cathode lamps recorded using 1.0 m Fourier transform spectrometer (FTS) and are available digital library National Solar Observatory Kitt Peak, USA (http://diglib.nso.edu/). Furthermore, by combining determined BFs with reliable lifetime values reported in literature, transition probabilities absolute oscillator strengths these derived.
Viscous fluid in an ultrahigh-mobility two-dimensional electron gas (2DEG) GaAs/AlGaAs quantum wells is systematically studied through measurements of negative magnetoresistance (NMR) and photoresistance under microwave radiation, the data are analyzed according to recent theoretical work by e.g., Alekseev, Physical Review Letters 117,166601 (2016). Size-dependent temperature dependent NMR found conform predictions. In particular, transport 2DEG with relatively weak Coulomb interaction...
AB oscillation in weak magnetic field (B<1.5kG) is observed QPC due to interference between electrons propagating along different channels. We also investigate photo-induced magnetoresistance open-regime split-gate under MW irradiation. It attributed EMPs interfering the region. The influence of power, frequency and split gate voltage discussed thoroughly. unify result photoconductance at B=0 with EMP theories. profoundly understand EMP-induced resistance together negative open regime.
We measure the resistance oscillation of quantum point contact (QPC) under microwave (MW) radiation. What is different from common induced by edge magnetoplasmon (EMP) that at lower magnetic field ({\omega}>{\omega}_c), photoconductance positive (negative) with weak (strong) MW This transport phenomenon proved to be related superballistic flow electrons through QPC. The distinction between regions {\omega}>{\omega}_c and {\omega}<{\omega}_c attributed absorption rate Violent occurs when...
Surface acoustic wave (SAW) is a powerful technique for investigating quantum phases appearing in two-dimensional electron systems. The electrons respond to the piezoelectric field of SAW through screening, attenuating its amplitude, and shifting velocity, which described by relaxation model. In this work, we systematically study interaction using orders magnitude lower amplitude than those previous studies. At high magnetic fields, when form highly correlated states such as Hall effect,...
Through reading the documentation in context, tool-using language models can dynamically extend their capability using external tools. The cost is that we have to input lengthy every time model needs use tool, occupying window as well slowing down decoding process. Given progress general-purpose compression, soft context compression a suitable approach alleviate problem. However, when compressing tool documentation, existing methods suffer from weaknesses of key information loss...
We measure the radiative lifetimes of 17 levels in Y I with a time-resolved laser-induced fluorescence technique. Of these levels, 13 are reported on for first time to best our knowledge. Branching fractions 72 lines related determined based spectra by Fourier transform spectrometer at National Solar Observatory (NSO) Kitt Peak, USA (http://diglib.nso.edu/ftp.html). By combining results and branching ratios, transition probabilities (gA) oscillator strengths (log(gf)) determined. The...
The radiative lifetime measurements by the time-resolved laser-induced fluorescence technique are reported for 24 levels of Co i with energy range 283 45.86–55 922.3 cm−1, amongst which lifetimes 20 first time. branching fraction emission spectrum a hollow cathode lamp were performed 11 them together other two in literature, and fractions 39 transitions obtained. By combining values, transition probabilities absolute oscillator strengths these lines determined.
Abstract Radiative lifetimes for 60 odd-parity levels of Nb i belonging to the 4d 3 5s5p and 4 5p configurations, except two with unknown configuration, which are in energy range between 23,910.90 37,188.28 cm −1 , measured by time-resolved laser-induced fluorescence technique. The lifetime values from 7.1 118.7 ns uncertainties less than 10%. To our knowledge, 45 determined this paper reported first time. By combining experimental or computed branching fractions, we obtain transition...
Natural radiative lifetimes for five even-parity levels of Tm III were measured by time-resolved laser-induced fluorescence method. The branching fraction measurements performed based on the emission spectra a hollow cathode lamp. By combining fractions and lifetime values reported in this work literature, experimental transition probabilities oscillator strengths 11 transitions derived first time.