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  • AIP Publishing  (48)
  • 11
    Online Resource
    Online Resource
    Oil impurities harm to arc discharge in multiampere DuoPIGatron ion source (abstract)
    AIP Publishing ; 1994
    In:  Review of Scientific Instruments Vol. 65, No. 4 ( 1994-04-01), p. 1479-1479
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 65, No. 4 ( 1994-04-01), p. 1479-1479
    Abstract: The major purpose of this paper is to describe that organic impurities cause harm to the arc discharge in the multiampere DuoPIGatron ion source and attempt to analyze the mechanism. Though we knew before that the existence of oil in the source is always harmful, for financial reasons, we had to use the available oil pump to pump gas. But we did not think that the oil pollution in the discharge chamber of the source could cause arc discharge failure so seriously that the source cannot operate normally. After encountering and solving the problem, we have recognized the severe action of oil pollution, and seen the damage mechanism. The up-stream oil vapor from big pumps entered the chamber of the plasma generator. Should the parts of plasma chamber, especially, the target cathode be polluted by oil vapor, it resulted in destroying the reflected discharge in the chamber so that the stable condition of plasma, that is Iig≫Iil could not be maintained. Here Iig and Iil represent generated and lost ion current, respectively. The arc discharge died. After protecting the target cathode from oil pollution by various ways, our 15-cm duoPIGatron can keep high performance operation for more than one year without recleaning. During this period, the arc current was larger than 300 A and the saturated ion current was above 234 mA/cm2.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.1144953
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1994
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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  • 12
    Online Resource
    Online Resource
    Conical third-harmonic generation in a hexagonally poled LiTaO3 crystal
    AIP Publishing ; 2017
    In:  Applied Physics Letters Vol. 110, No. 11 ( 2017-03-13)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 110, No. 11 ( 2017-03-13)
    Abstract: We experimentally observed conical third harmonic generation (THG) in a two-dimensional periodically poled LiTaO3 nonlinear photonic crystal. The conical THG was attributed to cascaded quasi-phase matching (QPM) processes assisted by scattering fundamental waves in the nonlinear photonic crystal. The characteristics of the generated conical beam, such as the emit angle and beam size, varied with the fundamental wavelength because it changed the scattering-assisted QPM configuration. Our experimental results demonstrated that scattering light can be effectively involved in a cascade nonlinear optical process through QPM, which provides a possible way to produce short-wavelength conical beams to meet the demands of practical applications.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4978669
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2017
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 13
    Online Resource
    Online Resource
    A perspective on the manipulation of orbital angular momentum states in nonlinear optics
    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: Orbital angular momentum (OAM) of light has been widely investigated in optical manipulation, optical communications, optical storage, and precision measurement. In recent years, the studies of OAM are expanded to nonlinear and quantum optics, paving a way to high-quality nonlinear imaging, high-capacity quantum communication, and many other promising applications. In this Perspective, we first summarize the fundamental research on OAM in nonlinear optics. Then, we introduce its recent applications in nonlinear imaging (including nonlinear spiral imaging and OAM-multiplexing nonlinear holography) and high-dimensional quantum entanglement. In particular, we highlight the manipulations of OAM through various functional nonlinear photonic crystals. Finally, we discuss the further developments of OAM-based nonlinear and quantum techniques in the near future.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0135224
    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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  • 14
    Online Resource
    Online Resource
    Determining the non-separability of vector modes with digital micromirror devices
    AIP Publishing ; 2020
    In:  Applied Physics Letters Vol. 116, No. 9 ( 2020-03-02)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 116, No. 9 ( 2020-03-02)
    Abstract: The non-separability between the spatial and polarization Degrees of Freedom (DoF) of complex vector light fields has drawn significant attention in recent times. Key to this is its remarkable similarities with quantum entanglement, with quantum-like effects observed at the classical level. Crucially, this parallelism enables the use of quantum tools to quantify the coupling between the spatial and polarization DoFs, usually implemented with polarization-dependent spatial light modulators, which requires the splitting of the vector mode into two orthogonal polarization components. Here, we put forward an alternative approach that relies on the use of Digital Micromirror Devices (DMDs) for a fast, cheap, and robust measurement, while the polarization-independent nature of DMDs enables a reduction in the number of required measurements by 25%. We tested our approach experimentally on cylindrical vector modes with arbitrary degrees of non-separability, of great relevance in a wide variety of applications. Our technique provides a reliable way to measure in real time the purity of vector modes, paving the way for a wide variety of applications where the degree of non-separability can be used as an optical sensor.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.5142163
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 15
    Online Resource
    Online Resource
    Automated real-time study of the defect-induced breakdown occurring on a film–electrode system under a high electric field
    AIP Publishing ; 2021
    In:  Review of Scientific Instruments Vol. 92, No. 12 ( 2021-12-01)
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 92, No. 12 ( 2021-12-01)
    Abstract: The energy storage density of a capacitor depends on its relative permittivity and breakdown strength. Breakdown of a thin film always first occurs at weak defect spots of dielectrics under a high electric field. It is of great significance to study the defect-induced breakdown of dielectrics to improve the breakdown strength of the dielectric. The majority of studies about the defect-induced breakdown only determine a certain voltage inducing the breakdown, and the single-hole breakdown spots influence the defect-induced breakdown and the intrinsic breakdown under a high electric field, which is hard to facilitate the in-depth study of improving the breakdown strength. Herein, the self-healing breakdown techniques are applied to avoid the influence of single-hole breakdown. An automated real-time testing system is used to study the defect-induced breakdown of various complex film–electrode systems, which accomplishes the temporal and spatial localization of breakdown events according to the physical chemistry characteristics of breakdowns and intelligently displays breakdown events, and detailed classification methods of the defect-induced breakdown are discussed concisely and efficiently. This real-time testing system is effective in revealing the defect-induced breakdown of various complex film–electrode systems under a high electric field, paving the way for uncovering the breakdown mechanism and studying how to improve the capacitor’s breakdown strength and energy density.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/5.0063312
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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  • 16
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    Online Resource
    Classically entangled Ince–Gaussian modes
    AIP Publishing ; 2020
    In:  Applied Physics Letters Vol. 116, No. 22 ( 2020-06-01)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 116, No. 22 ( 2020-06-01)
    Abstract: Complex vector light modes, classically entangled in their spatial and polarization degrees of freedom (DoF), have become ubiquitous in a vast diversity of research fields. Crucially, while polarization is limited to a bi-dimensional space, the spatial mode is unbounded, and it can be specified by any of the sets of solutions the wave equation can support in different coordinate systems. Here, we report on a class of vector beams with elliptical symmetry where the spatial DoF is encoded in the Ince–Gaussian modes of the cylindrical elliptical coordinates. We outline their geometric representation on the higher-order Poincaré sphere, demonstrate their experimental generation, and analyze the quality of the generated modes via Stokes polarimetry. We anticipate that such vector modes will be of great relevance in applications, such as optical manipulations, laser material processing, and optical communications among others.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0011142
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 17
    Online Resource
    Online Resource
    Influence of dense plasma on the energy levels and transition properties in highly charged ions
    AIP Publishing ; 2018
    In:  Physics of Plasmas Vol. 25, No. 3 ( 2018-03-01)
    Details
    In: Physics of Plasmas, AIP Publishing, Vol. 25, No. 3 ( 2018-03-01)
    Abstract: The studies of the influence of plasma environments on the level structures and transition properties for highly charged ions are presented. For the relativistic treatment, we implemented the multiconfiguration Dirac-Fock method incorporating the ion sphere (IS) model potential, in which the plasma screening is taken into account as a modified interaction potential between the electron and the nucleus. For the nonrelativistic treatment, analytical solutions of the Schrödinger equation with two types of the IS screened potential are proposed. The Ritz variation method is used with hydrogenic wave function as a trial wave function that contains two unknown variational parameters. Bound energies are derived from an energy equation, and the variational parameters are obtained from the minimisation condition of the expectation value of the energy. Numerical results for hydrogen-like ions in dense plasmas are presented as examples. A detailed analysis of the influence of relativistic effects on the energy levels and transition properties is also reported. Our results are compared with available results in the literature showing a good quantitative agreement.
    Type of Medium: Online Resource
    ISSN: 1070-664X , 1089-7674
    URL: Article
    DOI: 10.1063/1.5021325
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 1472746-8
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  • 18
    Online Resource
    Online Resource
    Influence of the spacer filament on the flow and mass transfer in reverse osmosis seawater desalination membrane
    AIP Publishing ; 2022
    In:  Physics of Fluids Vol. 34, No. 9 ( 2022-09-01)
    Details
    In: Physics of Fluids, AIP Publishing, Vol. 34, No. 9 ( 2022-09-01)
    Abstract: The influence of the spacer filament on the flow and mass transfer in reverse osmosis seawater desalination membrane is studied by the lattice Boltzmann method. The effects of Reynolds number (Re), blockage ratio (β), and osmotic pressure (ΔP) on the concentration polarization, permeate flux, the drag and lift forces on the spacer, and the shear stress on the membrane surface are studied, respectively. The results show that the spacer near the membrane surface at large Re can effectively prevent the formation of the concentration boundary layer. The vortices near the membrane surface bring the solutes into the bulk flow, then reducing the concentration polarization and improving the mass transfer efficiency. In addition, the changes of the flow pattern, the mean value of the drag coefficient (Cd), the lift coefficient (Cl), and the skin friction coefficient (fskin) are explored, respectively. The drag coefficient (Cd) increases with the increase in β and decreases with Re, the permeate flux across the membrane and the increasing of the osmotic pressure will slightly reduce the drag and lift coefficients.
    Type of Medium: Online Resource
    ISSN: 1070-6631 , 1089-7666
    URL: Article
    DOI: 10.1063/5.0105815
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 1472743-2
    detail.hit.zdb_id: 241528-8
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  • 19
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    Online Resource
    Design and test of a piezoelectric micropump based on hydraulic amplification
    AIP Publishing ; 2021
    In:  AIP Advances Vol. 11, No. 6 ( 2021-06-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 11, No. 6 ( 2021-06-01)
    Abstract: To solve the problem of the small deformation of piezoelectric vibrators and improve the overall performance of piezoelectric micro-pumps, a flexible-diaphragm piezoelectric micropump is designed based on hydraulic amplification. The micropump uses a piezoelectric vibrator to provide its driving force, and fluid is delivered by driving the liquid to amplify the displacement of the piezoelectric vibrator. First, the working principle of the piezoelectric micropump is analyzed, and then theoretical analysis and displacement output tests of the hydraulic amplifier unit are carried out. The test results are consistent with those of the theoretical analysis, and the amplification factor of the hydraulic amplifier unit is 3.29. Finally, prototypes are produced and an experimental platform is built for testing. The results indicate that the best-performing piezoelectric micropump has a self-priming height of 1200 mm, an output pressure of 22.16 kPa, and an output flow of 23.18 ml/min. Compared with an ordinary piezoelectric pump, the overall performance of the piezoelectric micropump is greatly improved.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/5.0053943
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 2583909-3
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  • 20
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    Online Resource
    Study on the electronic structure and the optical performance of YB6 by the first-principles calculations
    AIP Publishing ; 2011
    In:  AIP Advances Vol. 1, No. 2 ( 2011-06-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 1, No. 2 ( 2011-06-01)
    Abstract: The electronic structure and the optical performance of YB6 were investigated by first-principles calculations within the framework of density functional theory. It was found that the calculated results are in agreement with the relevant experimental data. Our theoretical studies showed that YB6 is a promising solar radiation shielding material for windows.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/1.3602854
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2011
    detail.hit.zdb_id: 2583909-3
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