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  • Online Resource  (6,296)
  • AIP Publishing  (6,296)
  • 2020-2024  (6,296)
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  • Online Resource  (6,296)
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  • AIP Publishing  (6,296)
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  • 2020-2024  (6,296)
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  • 1
    Online Resource
    Online Resource
    The effects of incident light wavelength difference on the collective stimulated Brillouin scattering in plasmas
    AIP Publishing ; 2023
    In:  Matter and Radiation at Extremes Vol. 8, No. 5 ( 2023-09-01)
    Details
    In: Matter and Radiation at Extremes, AIP Publishing, Vol. 8, No. 5 ( 2023-09-01)
    Abstract: The first laser–plasma interaction experiment using lasers of eight beams grouped into one octad has been conducted on the Shenguang Octopus facility. Although each beam intensity is below its individual threshold for stimulated Brillouin backscattering (SBS), collective behaviors are excited to enhance the octad SBS. In particular, when two-color/cone lasers with wavelength separation 0.3 nm are used, the backward SBS reflectivities show novel behavior in which beams of longer wavelength achieve higher SBS gain. This property of SBS can be attributed to the rotation of the wave vectors of common ion acoustic waves due to the competition of detunings between geometrical angle and wavelength separation. This mechanism is confirmed using massively parallel supercomputer simulations with the three-dimensional laser–plasma interaction code LAP3D.
    Type of Medium: Online Resource
    ISSN: 2468-2047 , 2468-080X
    URL: Article
    DOI: 10.1063/5.0151372
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2858469-7
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  • 2
    Online Resource
    Online Resource
    Feasibility and equivalence analysis of transient dose rate effect simulation by pulsed laser in level-shifting transceiver and TCAD simulation on its ESD circuits
    AIP Publishing ; 2023
    In:  AIP Advances Vol. 13, No. 4 ( 2023-04-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 13, No. 4 ( 2023-04-01)
    Abstract: Compared to linear accelerators, pulsed lasers have the characteristics of high efficiency, low cost, stable pulse output, and low environment interference for researching the transient dose rate effect (TDRE) on semiconductor devices. In this paper, pulsed laser radiation experiments are performed on a level-shifting transceiver. The experimental results are consistent with the results of the transient γ-ray radiation experiment, demonstrating the feasibility of using the pulsed laser in TDRE research on the level-shifting transceiver. This paper obtains theoretical and experimental conversion factors (CFs) through theoretical analysis and equivalency of the peak photocurrents, which are measured in pulsed laser and transient γ-ray radiation experiments. The CF results from the two approaches are within 7% of each other. In pulsed laser radiation experiments, an uncommon phenomenon is found. At the I/O (Input/Output) ports of the level-shifting transceiver, a trend of a positive photocurrent followed by a negative pulse is observed. A hypothesis is proposed that this photocurrent is produced by the turn-on and turn-off of the parasitic PNP (Positive-Negative-Positive) transistors in electrostatic discharge circuits at the level-shifting transceiver I/O ports. In addition, this hypothesis is verified by TCAD (Technology Computer Aided Design) simulations.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/5.0146016
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 2583909-3
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  • 3
    Online Resource
    Online Resource
    Determination of laser entrance hole size for ignition-scale octahedral spherical hohlraums
    AIP Publishing ; 2022
    In:  Matter and Radiation at Extremes Vol. 7, No. 6 ( 2022-11-01)
    Details
    In: Matter and Radiation at Extremes, AIP Publishing, Vol. 7, No. 6 ( 2022-11-01)
    Abstract: A recently proposed octahedral spherical hohlraum with six laser entrance holes (LEHs) is an attractive concept for an upgraded laser facility aiming at a predictable and reproducible fusion gain with a simple target design. However, with the laser energies available at present, LEH size can be a critical issue. Owing to the uncertainties in simulation results, the LEH size should be determined on the basis of experimental evidence. However, determination of LEH size of an ignition target at a small-scale laser facility poses difficulties. In this paper, we propose to use the prepulse of an ignition pulse to determine the LEH size for ignition-scale hohlraums via LEH closure behavior, and we present convincing evidence from multiple diagnostics at the SGIII facility with ignition-scale hohlraum, laser prepulse, and laser beam size. The LEH closure observed in our experiment is in agreement with data from the National Ignition Facility. The total LEH area of the octahedral hohlraum is found to be very close to that of a cylindrical hohlraum, thus successfully demonstrating the feasibility of the octahedral hohlraum in terms of laser energy, which is crucially important for sizing an ignition-scale octahedrally configured laser system. This work provides a novel way to determine the LEH size of an ignition target at a small-scale laser facility, and it can be applied to other hohlraum configurations for the indirect drive approach.
    Type of Medium: Online Resource
    ISSN: 2468-2047 , 2468-080X
    URL: Article
    DOI: 10.1063/5.0102447
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2858469-7
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  • 4
    Online Resource
    Online Resource
    Unipolar barriers in near-broken-gap heterostructures for high-performance self-powered photodetectors
    AIP Publishing ; 2023
    In:  Applied Physics Letters Vol. 122, No. 4 ( 2023-01-23)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 122, No. 4 ( 2023-01-23)
    Abstract: The two-dimensional heterostructure is a promising research direction in photodetection. However, developing a good photodetector with high responsivity and fast speed is still challenging. Herein, we fabricate a high-performance self-powered broadband (355–1064 nm) photodetector based on a near-broken-gap GeSe/SnS2/InSe heterostructure, where SnS2 is used as a potential hole barrier layer. The device shows an ultrahigh open-circuit voltage (VOC) of 0.57 V, a high power-dependent responsivity of 1.87 A W−1 at 355 nm, and a fast response time of 8 μs in the self-powered mode. Based on the near-broken band alignment, the InSe layer with high electron mobility can efficiently collect the photogenerated electrons from the GeSe layer to improve conversion efficiency. Furthermore, the unipolar hole barrier at the interface can inhibit the Langevin recombination resulting in VOC enhancement. Notably, the anisotropy ratio of photocurrent in our device is also enhanced to ∼3.5, which is higher than GeSe photodetectors and other anisotropic devices counterparts. This work provides an opportunity for the realization of the high-sensitivity polarization-sensitive broadband photodetector.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0133326
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 5
    Online Resource
    Online Resource
    Spin reorientation induced large spin memory loss at Py/Pd interface
    AIP Publishing ; 2023
    In:  Applied Physics Letters Vol. 123, No. 11 ( 2023-09-11)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 123, No. 11 ( 2023-09-11)
    Abstract: Achieving spin current switching functionality is crucial for the development next-generation low power information storage. In this study, the spin reorientation and temperature dependence of spin Hall angle θSH in the Permalloy (Py)/Pd bilayer were investigated by using ferromagnetic resonance, spin pumping, inverse spin Hall effect, and quantum interference transport. The uniaxial ferromagnetic perpendicular magnetic anisotropy (PMA) induced by spin reorientation persists at the Py/Pd interface below 30 K. This PMA further enhances the interfacial spin scattering, leading to a reduction of injected spin current, as indicated by the underestimated θSH values. These experimental results demonstrate that the interfacial spin reorientation at the ferromagnet/heavy metal interface, commonly employed in spintronic devices, causes a significant spin memory loss effect. Our findings provide valuable insights into the influence of interlayer spin configuration on spin transport, which can be utilized in the rational design of spintronic devices based on pure spin current.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0166050
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 6
    Online Resource
    Online Resource
    Electrical control of ON–OFF magnetism and exchange bias via reversible ionic motion
    AIP Publishing ; 2022
    In:  Applied Physics Letters Vol. 120, No. 8 ( 2022-02-21)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 120, No. 8 ( 2022-02-21)
    Abstract: The lithium-based magneto-ionic effect is an emerging and promising way to control magnetism. Here, a lithium-ion battery-structure is adopted to control the magnetic properties of the Co/CoO bilayer. Using operando magnetometry, we performed a reversible toggling of lithium ion induced magnetic phase transition between nano-Co (superparamagnetism) and CoO (antiferromagnetism), which enables an ON–OFF magnetism switching. On this basis, a robust modulation of exchange bias by electric field at low temperature is achieved. In addition, reversible tuning of coercivity and magnetization up to 71% and 118%, respectively, in a Co/CoO bilayer at room temperature are performed. This work provides a more efficient means to modulate antiferromagnetism and exchange bias, facilitating the development of antiferromagnetic spintronics.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0084190
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 7
    Online Resource
    Online Resource
    Uncovering the cell fate decision in lysis–lysogeny transition and stem cell development via Markov state modeling
    AIP Publishing ; 2021
    In:  The Journal of Chemical Physics Vol. 155, No. 24 ( 2021-12-28)
    Details
    In: The Journal of Chemical Physics, AIP Publishing, Vol. 155, No. 24 ( 2021-12-28)
    Abstract: Understanding the behavior of a complex gene regulatory network is a fundamental but challenging task in systems biology. How to reduce the large number of degrees of freedom of a specific network and identify its main biological pathway is the key issue. In this paper, we utilized the transition path theory (TPT) and Markov state modeling (MSM) framework to numerically study two typical cell fate decision processes: the lysis–lysogeny transition and stem cell development. The application of TPT to the lysis–lysogeny decision-making system reveals that the competitions of CI and Cro dimer binding play the major role in determining the cell fates. We also quantified the transition rates from the lysogeny to lysis state under different conditions. The overall computational results are consistent with biological intuitions but with more detailed information. For the stem cell developmental system, we applied the MSM to reduce the original dynamics to a moderate-size Markov chain. Further spectral analysis showed that the reduced system exhibits nine metastable states, which correspond to the refinement of the five known typical cell types in development. We further investigated the dominant transition pathways corresponding to the cell differentiation, reprogramming, and trans-differentiation. A similar approach can be applied to study other biological systems.
    Type of Medium: Online Resource
    ISSN: 0021-9606 , 1089-7690
    URL: Article
    DOI: 10.1063/5.0070485
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 3113-6
    detail.hit.zdb_id: 1473050-9
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  • 8
    Online Resource
    Online Resource
    Electrically controlled optical nonlinear effects in the hybrid opto-electromechanical system with the cross-Kerr effect
    AIP Publishing ; 2022
    In:  Journal of Applied Physics Vol. 131, No. 19 ( 2022-05-21)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 131, No. 19 ( 2022-05-21)
    Abstract: We theoretically study the nonlinear optical phenomena including optical stability state and four-wave mixing (FWM) process in a hybrid opto-electromechanical system with the cross-Kerr (CK) effect. The hybrid system consists of an optomechanical cavity in which the cross-Kerr (CK) effect and Coulomb interaction are simultaneously introduced by the CK medium and the mechanical resonator capacitively coupling to an external circuit, respectively. The CK interaction induces a tristability behavior of the mean intracavity photon number, which can be modulated by the strength of the CK effect and electrically controlled by the voltage on the capacitor. In addition, we give the effects of the optomechanical, CK, and Coulomb coupling strengths on the FWM of the output field. The results show that the voltage can be employed to electrically engineer the optical nonlinear phenomena.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/5.0091211
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 9
    Online Resource
    Online Resource
    Some aspects of the plasma potential in 3D simulation of ECRIS operation
    AIP Publishing ; 2022
    In:  Physics of Plasmas Vol. 29, No. 7 ( 2022-07-01)
    Details
    In: Physics of Plasmas, AIP Publishing, Vol. 29, No. 7 ( 2022-07-01)
    Abstract: A 3D particle-in-cell plus Monte Carlo collision (PIC/MCC) code is developed for the simulation of electron cyclotron resonance ion source (ECRIS). The self-consistent interaction between the plasma and the potential field is taken into account, as well as Coulomb collisions, stepwise ionization, and charge exchange collisions between particles. In addition, a precalculation module based on a single-particle approach is introduced to speed up simulations. The stable distributions of the high-energy electrons are obtained and then sent to the subsequent simulation of ECRIS operation as the well-confined warm and hot electrons. An implicit electrostatic PIC model in this simulation self-consistently describes the evolution of the ECR plasma. The results are obtained for the plasma potential in a steady state, including the global amplitude and distribution profiles. The potential distribution of the ECR plasma is characterized by magnetic fields. These results, together with those for the charge density, are analyzed and discussed from the perspective of plasma diffusion.
    Type of Medium: Online Resource
    ISSN: 1070-664X , 1089-7674
    URL: Article
    DOI: 10.1063/5.0097141
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 1472746-8
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  • 10
    Online Resource
    Online Resource
    Broadband and high-performance SnS2/FePS3/graphene van der Waals heterojunction photodetector
    AIP Publishing ; 2022
    In:  Applied Physics Letters Vol. 120, No. 8 ( 2022-02-21)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 120, No. 8 ( 2022-02-21)
    Abstract: Two-dimensional materials and their heterojunctions have received extensive attention in fundamental and applied research of photonics, electronics, and spintronics. Herein, we stacked SnS2, FePS3, and graphene (Gr) nanosheets into SnS2/FePS3/Gr van der Waals heterojunction, which exhibits broadband photoresponse from an ultraviolet region (405 nm) to an infrared region (850 nm) in atmosphere at room temperature. It was found that the dominated carrier of SnS2/FePS3 and SnS2/FePS3/Gr hererojunction was different in the electrical transport. The photoresponsivity of SnS2/FePS3/Gr heterojunction was about two orders of magnitude higher than that of SnS2 and FePS3 and SnS2/FePS3 heterojunction. The response time of SnS2/FePS3/Gr heterojunction was slightly shorter than that of SnS2/FePS3 heterojunction and two orders of magnitude shorter than that of SnS2 and FePS3 under the 450 nm laser. The high responsivity and short response time of SnS2/FePS3/Gr heterojunction should be attributed to the type II band alignment and short channel distance in the vertical direction where electrons and holes can be separated and transit fast. Our result offered an opportunity for realization of the high-performance and broadband photodetector.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0083272
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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