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  • AIP Publishing  (26)
  • 1
    Online Resource
    Online Resource
    Exceptional point shifted by Kerr effect in anti-parity-time symmetry system
    AIP Publishing ; 2022
    In:  Journal of Applied Physics Vol. 131, No. 24 ( 2022-06-28)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 131, No. 24 ( 2022-06-28)
    Abstract: With respect to parity-time symmetry, an anti-parity-time (APT) symmetric system exhibits much easier readout mechanism due to its real frequency splitting. Generally, such systems need to be operated at exceptional points (EPs) to obtain the best performance. However, strict conditions to locate APT symmetric systems at their EPs precisely put restraints on their practical applications. To overcome this problem, we propose a scheme to manipulate EPs in APT symmetric configuration by the Kerr effect. It is demonstrated that operating EPs by self-phase modulation alone will impede frequency splitting caused by external perturbations, while cross-phase modulation can enhance the response to measurable perturbations. We also investigate the thermal effect induced by high light intensity, which could reduce the power to manipulate EPs. This proposed scheme can pave a new way for fabricating devices based on APT symmetry.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/5.0094917
    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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  • 2
    Online Resource
    Online Resource
    Numerical study of the impact of contact line with hysteresis on the Faraday instability
    AIP Publishing ; 2022
    In:  Physics of Fluids Vol. 34, No. 7 ( 2022-07-01)
    Details
    In: Physics of Fluids, AIP Publishing, Vol. 34, No. 7 ( 2022-07-01)
    Abstract: We report a numerical study of the contact-line effect on the Faraday instability. A momentum balance model is implemented to simulate the hysteresis of the meniscus. By using this model, a stick–slip-motion of the contact line happens on the lateral wall when a vertical vibration is exerted to the container. The numerical result further supports that the contact-line hysteresis can increase the natural frequency by inference. Besides, it can largely delay the timing of the onset because of an extra dissipation provided by the capillary effect. The growth rate can also be affected by the meniscus but the impact of the hysteresis seems limited. The presence of the meniscus is the reason why Faraday instability occurs without any artificial disturbance. Finally, a linear relation between the contact-angle range and the contact-line position is observed from our computation.
    Type of Medium: Online Resource
    ISSN: 1070-6631 , 1089-7666
    URL: Article
    DOI: 10.1063/5.0101956
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 1472743-2
    detail.hit.zdb_id: 241528-8
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  • 3
    Online Resource
    Online Resource
    Effect of depth on the properties of two coupled Faraday waves in a Hele-Shaw cell
    AIP Publishing ; 2018
    In:  Physics of Fluids Vol. 30, No. 10 ( 2018-10-01)
    Details
    In: Physics of Fluids, AIP Publishing, Vol. 30, No. 10 ( 2018-10-01)
    Abstract: A new type of coupled Faraday wave appears in the system of two immiscible incompressible viscous liquid layers with a free surface filling in a Hele-Shaw cell under vertical oscillation [X. Li, X. Li, and S. Liao, “Observation of two coupled Faraday waves in a vertically vibrating Hele-Shaw cell with one of them oscillating horizontally,” Phys. Fluids, 30, 012108 (2018)]. The influence in terms of both depth of upper and lower liquids on these standing waves has been analyzed quantitatively by experiments, which can be understood in the form of the wave amplitudes, dispersion relation, and stability. It suggests that the depth of upper liquid plays a remarkable role, while the lower one does not seem to contribute significantly.
    Type of Medium: Online Resource
    ISSN: 1070-6631 , 1089-7666
    URL: Article
    DOI: 10.1063/1.5054047
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 1472743-2
    detail.hit.zdb_id: 241528-8
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  • 4
    Online Resource
    Online Resource
    Gate-free tunable 2D/2D heterojunction composed of MoTe2 and 2D electron gas at the surface of KTaO3
    AIP Publishing ; 2022
    In:  Applied Physics Letters Vol. 121, No. 7 ( 2022-08-15)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 121, No. 7 ( 2022-08-15)
    Abstract: The hybrid integration of oxide two-dimensional electron gases (2DEGs) and 2D layered transition-metal dichalcogenides is expected to exhibit diverse physical phenomena, which cannot appear in either material alone. Here, we demonstrate a gate-free tunable 2D/2D heterojunction composed of MoTe2 and 2DEG at the surface of KTaO3. The combination of metallic MoTe2 and n-type 2DEG together forms a Schottky diode with a large on/off current ratio of 104 at room temperature. Moreover, the MoTe2/2DEG diode exhibits largely tunable electrical transport characteristics without gate voltages. By applying bias voltages, the diode shows tunable transport properties ranging from insulating to excellent rectifying behaviors. The bias-voltage-dependent modulation dominantly originates from the tunable Schottky barrier width controlled by the carrier density of the 2DEG. Our results pave a way for the development of 2D nanoelectronic devices such as multi-bit memories and bias sensors.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0100028
    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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  • 5
    Online Resource
    Online Resource
    Observation of two coupled Faraday waves in a vertically vibrating Hele-Shaw cell with one of them oscillating horizontally
    AIP Publishing ; 2018
    In:  Physics of Fluids Vol. 30, No. 1 ( 2018-01-01)
    Details
    In: Physics of Fluids, AIP Publishing, Vol. 30, No. 1 ( 2018-01-01)
    Abstract: A system of two coupled Faraday waves is experimentally observed at the two interfaces of the three layers of fluids (air, pure ethanol, and silicon oil) in a covered Hele-Shaw cell with periodic vertical vibration. Both the upper and lower Faraday waves are subharmonic, but they coexist in different forms: the upper one vibrates vertically, while the crests of the lower one oscillate horizontally with unchanged wave height, and the troughs of the lower one usually remain in the same place (relative to the basin). Besides, they are strongly coupled: the wave height of the lower Faraday waves is either a linear function (when forcing frequency is fixed) or a parabolic function (when acceleration amplitude is fixed) of that of the upper one with a same wavelength.
    Type of Medium: Online Resource
    ISSN: 1070-6631 , 1089-7666
    URL: Article
    DOI: 10.1063/1.5004452
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 1472743-2
    detail.hit.zdb_id: 241528-8
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  • 6
    Online Resource
    Online Resource
    Faraday waves in a Hele-Shaw cell
    AIP Publishing ; 2018
    In:  Physics of Fluids Vol. 30, No. 4 ( 2018-04-01)
    Details
    In: Physics of Fluids, AIP Publishing, Vol. 30, No. 4 ( 2018-04-01)
    Abstract: We investigate Faraday waves in a Hele-Shaw cell via experimental, numerical, and theoretical studies. Inspired by the Kelvin-Helmholtz-Darcy theory, we develop the gap-averaged Navier-Stokes equations and end up with the stable standing waves with half frequency of the external forced vibration. To overcome the dependency of a numerical model on the experimental parameter of wave length, we take two-phase flow into consideration and a novel dispersion relation is derived. The numerical results compare well with our experimental data, which effectively validates our proposed mathematical model. Therefore, this model can produce robust solutions of Faraday wave patterns and resolve related physical phenomena, which demonstrates the practical importance of the present study.
    Type of Medium: Online Resource
    ISSN: 1070-6631 , 1089-7666
    URL: Article
    DOI: 10.1063/1.5022424
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 1472743-2
    detail.hit.zdb_id: 241528-8
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  • 7
    Online Resource
    Online Resource
    Analytical approach to the solution of short-crested wave interaction with V-shaped and arc-shaped breakwaters
    AIP Publishing ; 2022
    In:  Physics of Fluids Vol. 34, No. 2 ( 2022-02-01)
    Details
    In: Physics of Fluids, AIP Publishing, Vol. 34, No. 2 ( 2022-02-01)
    Abstract: The hydrodynamic performance of short-crested wave diffraction by bottom-mounted V-shaped and arc-shaped breakwaters was examined based on the linear wave theory and the eigenfunction expansion method, respectively. Both types of breakwaters are assumed to be thin, impermeable, vertical, and rigidly embedded in the seabed. With the help of a virtual interface, the fluid domains were subdivided into subdomains and the velocity potential in each subdomain was described by eigenfunctions. The linear algebraic equations that determine the unknown coefficients can be obtained using the boundary and matching conditions. The analytical models fully agree with previous predictions. The major factors including wave propagation direction, opening angle, and water depth that affect wave forces and run-ups were explored. The results showed that the wave patterns of short-crested waves near breakwaters were quite different from those of long-crested waves, and using the long-crested wave model can overestimate the wave-defending effects of the breakwaters in a short-crested sea. An analogous wave attenuation effect was observed for breakwaters with comparable structures, which means that engineering practice has a certain degree of substitutability between them.
    Type of Medium: Online Resource
    ISSN: 1070-6631 , 1089-7666
    URL: Article
    DOI: 10.1063/5.0078604
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 1472743-2
    detail.hit.zdb_id: 241528-8
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  • 8
    Online Resource
    Online Resource
    A new instrument for collecting dynamic data of rotors
    AIP Publishing ; 1998
    In:  Review of Scientific Instruments Vol. 69, No. 8 ( 1998-08-01), p. 3072-3076
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 69, No. 8 ( 1998-08-01), p. 3072-3076
    Abstract: A new and practical instrument to collect the dynamic data of rotors has been developed. The instrument is described and the signal transmitting properties have been tested. The test results show that the amplitude-frequency performance, the linear error, and the channel-isolation ability of this instrument satisfy the testing requirement. As an application example, this new instrument was used to test gear vibration on a gear testing table. The system has a very high anti-interference ability and excellent stability. The properties of this instrument are as follows: dynamic maximum frequency is 50 kHz, static sine distortion degree is less than 1%, dynamic channel isolation is −40 dB, dynamic linear error is less than 1%, both the static and dynamic gains are 50–200 times. The test results are consistent with the theoretical calculations. The system has been applied to collect dynamic data on rotors such as gears, axels, and engine propellers.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.1149058
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1998
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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  • 9
    Online Resource
    Online Resource
    Liver-on-a-chip: Considerations, advances, and beyond
    AIP Publishing ; 2022
    In:  Biomicrofluidics Vol. 16, No. 6 ( 2022-12-01)
    Details
    In: Biomicrofluidics, AIP Publishing, Vol. 16, No. 6 ( 2022-12-01)
    Abstract: The liver is the largest internal organ in the human body with largest mass of glandular tissue. Modeling the liver has been challenging due to its variety of major functions, including processing nutrients and vitamins, detoxification, and regulating body metabolism. The intrinsic shortfalls of conventional two-dimensional (2D) cell culture methods for studying pharmacokinetics in parenchymal cells (hepatocytes) have contributed to suboptimal outcomes in clinical trials and drug development. This prompts the development of highly automated, biomimetic liver-on-a-chip (LOC) devices to simulate native liver structure and function, with the aid of recent progress in microfluidics. LOC offers a cost-effective and accurate model for pharmacokinetics, pharmacodynamics, and toxicity studies. This review provides a critical update on recent developments in designing LOCs and fabrication strategies. We highlight biomimetic design approaches for LOCs, including mimicking liver structure and function, and their diverse applications in areas such as drug screening, toxicity assessment, and real-time biosensing. We capture the newest ideas in the field to advance the field of LOCs and address current challenges.
    Type of Medium: Online Resource
    ISSN: 1932-1058
    URL: Article
    DOI: 10.1063/5.0106855
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2265444-6
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  • 10
    Online Resource
    Online Resource
    Conformity effect on the evolution of cooperation in signed networks
    AIP Publishing ; 2023
    In:  Chaos: An Interdisciplinary Journal of Nonlinear Science Vol. 33, No. 2 ( 2023-02-01)
    Details
    In: Chaos: An Interdisciplinary Journal of Nonlinear Science, AIP Publishing, Vol. 33, No. 2 ( 2023-02-01)
    Abstract: Human behaviors are often subject to conformity, but little research attention has been paid to social dilemmas in which players are assumed to only pursue the maximization of their payoffs. The present study proposed a generalized prisoner dilemma model in a signed network considering conformity. Simulation shows that conformity helps promote the imitation of cooperative behavior when positive edges dominate the network, while negative edges may impede conformity from fostering cooperation. The logic of homophily and xenophobia allows for the coexistence of cooperators and defectors and guides the evolution toward the equality of the two strategies. We also find that cooperation prevails when individuals have a higher probability of adjusting their relation signs, but conformity may mediate the effect of network adaptation. From a population-wide view, network adaptation and conformity are capable of forming the structures of attractors or repellers.
    Type of Medium: Online Resource
    ISSN: 1054-1500 , 1089-7682
    URL: Article
    DOI: 10.1063/5.0101350
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 1472677-4
    SSG: 11
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