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  • AIP Publishing  (12)
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  • AIP Publishing  (12)
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  • 1
    Online Resource
    Online Resource
    Learning-enabled recovering scattered data from twisted light transmitted through a long standard multimode fiber
    AIP Publishing ; 2022
    In:  Applied Physics Letters Vol. 120, No. 13 ( 2022-03-28)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 120, No. 13 ( 2022-03-28)
    Abstract: Multiplexing multiple orbital angular momentum (OAM) modes of light has proven to be an effective way to increase data capacity in fiber-optic communications. However, existing techniques for distributing the OAM modes rely on specially designed fibers or couplers. Direct transmission of multiplexed OAM modes through a long standard multimode fiber remains challenging because the strong mode coupling in fibers disables OAM demultiplexing. Here, we propose a deep-learning-based approach to recover the scattered data from multiplexed OAM channels without measuring any phase information. Over a 1-km-long standard multimode fiber, our method is able to identify different OAM modes with an accuracy of more than 99.9% in the parallel demultiplexing of 24 scattered OAM channels. To demonstrate the transmission quality, color images are encoded in multiplexed twisted light and our method achieves decoding the transmitted data with an error rate of 0.13%. Our work shows that the artificial intelligence algorithm could benefit the use of OAM multiplexing in commercial fiber networks and high-performance optical communication in turbulent environments.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0087783
    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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  • 2
    Online Resource
    Online Resource
    Residual compressive stress induced infrared-absorption frequency shift of hexagonal boron nitride in cubic boron nitride films prepared by plasma-enhanced chemical vapor deposition
    AIP Publishing ; 2012
    In:  Journal of Applied Physics Vol. 112, No. 5 ( 2012-09-01)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 112, No. 5 ( 2012-09-01)
    Abstract: The effects of compressive stress on the TO phonon frequencies of hexagonal boron nitride (hBN) in cubic BN (cBN) films were investigated using infrared absorption spectroscopy, showing that the B–N stretching vibration of hBN at 1380 cm−1 shifted to high wavenumbers under biaxial compressive stress with the rate 2.65 cm−1 per GPa, while the B–N–B bending vibration near 780 cm−1 shifted to low wavenumbers with the rate −3.45 cm−1/GPa. The density functional perturbation theoretical calculation was carried out to check the above phonon frequencies under stress for two typical orientations of hBN crystallite. The results are shown to be in fair agreement with the experimental data. Our results suggest that the residual compressive stress accumulated in cBN films can be evaluated from the IR peak position near 780 cm−1.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4749805
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Explosion-driven interfacial instabilities of granular media
    AIP Publishing ; 2020
    In:  Physics of Fluids Vol. 32, No. 8 ( 2020-08-01)
    Details
    In: Physics of Fluids, AIP Publishing, Vol. 32, No. 8 ( 2020-08-01)
    Abstract: This paper investigates the evolution of a Richtmyer–Meshkov (RM)-like instability on the internal surface of particle rings impinged by divergent blast waves. Despite the signature spike–bubble instability structure analogous to the hydrodynamic RM instability, the growth of the perturbation amplitude in granular media undergoes an exponential phase followed by a linear phase, markedly differing from the hydrodynamic RM instability and indicating a fundamentally different mechanism. The granular RM-like instability arises from the incipient transverse granular flows induced by hydrodynamic effects upon the shock interaction. Substantial perturbation growth is initiated by the ensuing rarefaction dilation when the hydrodynamic effects are small. It is found that the interplay between the localized transverse and radial granular flows sustains the persistent perturbation growth and drives the corresponding morphological changes in the instability pattern.
    Type of Medium: Online Resource
    ISSN: 1070-6631 , 1089-7666
    URL: Article
    DOI: 10.1063/5.0014039
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 1472743-2
    detail.hit.zdb_id: 241528-8
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  • 4
    Online Resource
    Online Resource
    Large-FOV scattering-assisted holographic projection by enhanced sampling of transmission matrix
    AIP Publishing ; 2023
    In:  Applied Physics Letters Vol. 122, No. 6 ( 2023-02-06)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 122, No. 6 ( 2023-02-06)
    Abstract: Based on wavefront shaping, scattering materials provide a unique tool to break the trade-off between the viewing angle and field of view (FOV) for three-dimensional holographic projections. However, large-size image projection is limited by the low sampling ability of the transmission matrix (TM) of the scattering medium. Here, we propose a disperse and montage sampling strategy to access the TM for large-size image projection by scattering-assisted holography. Compared with the conventional TM sampling methods, our method achieves control of the output field with an enlarged FOV and improved adaptability. Experimentally, we achieve calibration of a TM corresponding to 1920 × 780 output pixels. As a proof of concept, we demonstrate holographic projection of large-size letter images within an area of 11.25 × 4.57 mm2 behind a scattering medium. In addition, we show that large-FOV vectorial projection can also be achieved by sampling the polarization-related TMs. Our work is expected to benefit scattering-assisted holographic techniques with potential applications in holographic display, imaging, and trapping.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0137279
    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
    Social contagions on interconnected networks of heterogeneous populations
    AIP Publishing ; 2018
    In:  Chaos: An Interdisciplinary Journal of Nonlinear Science Vol. 28, No. 11 ( 2018-11-01)
    Details
    In: Chaos: An Interdisciplinary Journal of Nonlinear Science, AIP Publishing, Vol. 28, No. 11 ( 2018-11-01)
    Abstract: Recently, the dynamics of social contagions ranging from the adoption of a new product to the diffusion of a rumor have attracted more and more attention from researchers. However, the combined effects of individual’s heterogenous adoption behavior and the interconnected structure on the social contagions processes have yet to be understood deeply. In this paper, we study theoretically and numerically the social contagions with heterogeneous adoption threshold in interconnected networks. We first develop a generalized edge-based compartmental approach to predict the evolution of social contagion dynamics on interconnected networks. Both the theoretical predictions and numerical results show that the growth of the final recovered fraction with the intralayer propagation rate displays double transitions. When increasing the initial adopted proportion or the adopted threshold, the first transition remains continuous within different dynamic parameters, but the second transition gradually vanishes. When decreasing the interlayer propagation rate, the change in the double transitions mentioned above is also observed. The heterogeneity of degree distribution does not affect the type of first transition, but increasing the heterogeneity of degree distribution results in the type change of the second transition from discontinuous to continuous. The consistency between the theoretical predictions and numerical results confirms the validity of our proposed analytical approach.
    Type of Medium: Online Resource
    ISSN: 1054-1500 , 1089-7682
    URL: Article
    DOI: 10.1063/1.5042677
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 1472677-4
    SSG: 11
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  • 6
    Online Resource
    Online Resource
    Molecular dynamics study of water and ion behaviors of mixed salts solutions on extended quartz surface
    AIP Publishing ; 2022
    In:  Journal of Applied Physics Vol. 132, No. 2 ( 2022-07-14)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 132, No. 2 ( 2022-07-14)
    Abstract: The adoption and evolution of water molecules and ions in mixed electrolytes at the surface play vital roles in the physical properties and chemical reactions of SiO2-like corrosion. The effect of salt type and concentration on the structure and dynamics of water molecules and ions at silica surfaces are studied using all-atom molecular dynamics simulations taking the case of the NaCl, MgCl2, and NaCl–MgCl2 aqueous solutions. The ability of ion hydration is in the order of Mg2+  & gt; Na+  & gt; Cl−, being opposite to their hydration Gibbs free energies, which directly influence the weak interaction in the solution and the diffusion rate of the particles. Mg shows stronger destruction to weak interactions than Na does, and ionic hydration of Mg2+ decelerates the self-diffusion coefficient of water molecules significantly due to the enhanced Coulomb effect and the interruption of solution continuity. Meanwhile, the self-diffusion coefficient of particles decreases with the concentration improvement in the single salt solution as increased ionic hydration. In the mixed salt solution, the order of diffusion rate is Cl−  & gt; Na+  & gt; Mg2+ as a result of the different confinement effects of the protonated pore. Interestingly, a small amount of Na+ addition can promote the self-diffusion of Mg2+, but a great many of Na+ addition slows the diffusion of Mg2+. This work provides comprehensive insight into the behavior of mixed salt solutions at silica surfaces, shedding light on the practical applications of geological sciences, cultural relics protection, and colloidal sciences.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/5.0093885
    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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    Online Resource
  • 7
    Online Resource
    Online Resource
    Experiment study and FEM simulation on erythrocytes under linear stretching of optical micromanipulation
    AIP Publishing ; 2017
    In:  AIP Advances Vol. 7, No. 8 ( 2017-08-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 7, No. 8 ( 2017-08-01)
    Abstract: The elasticity of erythrocytes is an important criterion to evaluate the quality of blood. This paper presents a novel research on erythrocytes’ elasticity with the application of optical tweezers and the finite element method (FEM) during blood storage. In this work, the erythrocytes with different in vitro times were linearly stretched by trapping force using optical tweezers and the time dependent elasticity of erythrocytes was investigated. The experimental results indicate that the membrane shear moduli of erythrocytes increased with the increasing in vitro time, namely the elasticity was decreasing. Simultaneously, an erythrocyte shell model with two parameters (membrane thickness h and membrane shear modulus H) was built to simulate the linear stretching states of erythrocytes by the FEM, and the simulations conform to the results obtained in the experiment. The evolution process was found that the erythrocytes membrane thicknesses were decreasing. The analysis assumes that the partial proteins and lipid bilayer of erythrocyte membrane were decomposed during the in vitro preservation of blood, which results in thin thickness, weak bending resistance, and losing elasticity of erythrocyte membrane. This study implies that the FEM can be employed to investigate the inward mechanical property changes of erythrocyte in different environments, which also can be a guideline for studying the erythrocyte mechanical state suffered from different diseases.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/1.4989980
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2017
    detail.hit.zdb_id: 2583909-3
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  • 8
    Online Resource
    Online Resource
    Pressure induced electronic phase transitions and superconductivity in n-type Bi2Te3
    AIP Publishing ; 2018
    In:  Journal of Applied Physics Vol. 123, No. 12 ( 2018-03-28)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 123, No. 12 ( 2018-03-28)
    Abstract: Temperature dependent-electrical resistance of n-type Bi2Te3 was investigated under high pressure. Superconductivity was detected at 4.9 GPa with Tconset = 2.8 K. Resistance and Tc suggest that there are two electronic phase transitions below 10 GPa. We conjecture that the bulk insulating phase first changes to semimetal and then to metal. The evolution of the Hall coefficient is qualitatively consistent with the proposed electronic phase transition. The origin of superconductivity and topological properties are also discussed.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4997967
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    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
    Effects of weak ties on epidemic predictability on community networks
    AIP Publishing ; 2012
    In:  Chaos: An Interdisciplinary Journal of Nonlinear Science Vol. 22, No. 4 ( 2012-12-01)
    Details
    In: Chaos: An Interdisciplinary Journal of Nonlinear Science, AIP Publishing, Vol. 22, No. 4 ( 2012-12-01)
    Abstract: Weak ties play a significant role in the structures and the dynamics of community networks. Based on the contact process, we study numerically how weak ties influence the predictability of epidemic dynamics. We first investigate the effects of the degree of bridge nodes on the variabilities of both the arrival time and the prevalence of disease, and find out that the bridge node with a small degree can enhance the predictability of epidemic spreading. Once weak ties are settled, the variability of the prevalence will display a complete opposite trend to that of the arrival time, as the distance from the initial seed to the bridge node or the degree of the initial seed increases. More specifically, the further distance and the larger degree of the initial seed can induce the better predictability of the arrival time and the worse predictability of the prevalence. Moreover, we discuss the effects of the number of weak ties on the epidemic variability. As the community strength becomes very strong, which is caused by the decrease of the number of weak ties, the epidemic variability will change dramatically. Compared with the case of the hub seed and the random seed, the bridge seed can result in the worst predictability of the arrival time and the best predictability of the prevalence.
    Type of Medium: Online Resource
    ISSN: 1054-1500 , 1089-7682
    URL: Article
    DOI: 10.1063/1.4767955
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 1472677-4
    SSG: 11
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  • 10
    Online Resource
    Online Resource
    Single-shot wide-field imaging in reflection by using a single multimode fiber
    AIP Publishing ; 2023
    In:  Applied Physics Letters Vol. 122, No. 6 ( 2023-02-06)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 122, No. 6 ( 2023-02-06)
    Abstract: A single multimode fiber (MMF) provides almost an ideal optical channel to constitute a hair-thin endoscope for minimally invasive biomedical imaging at depths in tissue, especially if the imaging operation can be performed with one single shot in reflection mode, which, however, remains challenging to date. In this work, we present single-shot wide-field reflectance imaging by using a single MMF as the illumination unit and imaging probe simultaneously. To achieve single-shot image capture, a reflection matrix of the fiber was built by a learning-assisted approach for the universal inverse conversion from the output amplitudes to the input amplitudes. The performance was tested by imaging more than 30 000 natural scenes projected by a digital micromirror device, and an averaged Pearson correlation coefficient over 0.84 with respect to the ground truth was achieved in the experiment. Furthermore, the ability to image dynamic scenes at a high frame rate of up to 180 frames per second was demonstrated together with real-time observation of a freely moving microneedle located at the distal end of the MMF. The proposed reflection-mode single-fiber imaging scheme paves the way for practical video-rate microendoscopy at depths in tissue in a minimally invasive manner.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0132123
    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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