Chinese Journal of Physics最新文献

{"title":"The evolution of dissipative soliton resonance from noise-like pulse via the saturable absorption to reverse saturable absorption transition within covalent organic framework saturable absorbers","authors":"Hsuan-Sen Wang ,&nbsp;Ahmed F.M. EL-Mahdy ,&nbsp;Shiao-Wei Kuo ,&nbsp;Wen-Hsuan Kuan ,&nbsp;Kuei-Huei Lin ,&nbsp;Gong-Ru Lin ,&nbsp;Chao-Kuei Lee","doi":"10.1016/j.cjph.2024.10.028","DOIUrl":"10.1016/j.cjph.2024.10.028","url":null,"abstract":"<div><div>In this study, for the first time, the dynamic evolution from noise-like pulses (NLPs) to dissipative soliton resonance (DSR) in an erbium-doped fiber laser system was observed and investigated by using a porphyrin/pyrene-linked covalent organic framework (COF) saturable absorber. Experimentally, by adjusting the pump power, the laser operation state was observed to be with a transition from NLPs to DSR. In addition, the correlation between the transition from NLPs to DSR and the variation from saturable absorption to reverse saturable absorption (RSA) within the COF material was analyzed, leading to the variation of absorption with increasing pump power playing a key role in this process. The competition mechanism between the spectral filtering effect and RSA was proposed, and the results observed agree quite well with the proposed model. This research not only reveals new features of pulse dynamics in fiber lasers but also highlights the potential of crystalline porous materials in nonlinear optical applications. It provides an important experimental foundation for further exploration of novel two-dimensional materials in the field of ultrafast optics.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1267-1274"},"PeriodicalIF":4.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Manipulating dwell time and spin polarization via δ-doping for electrons in spin-orbit-coupling modulated magnetic nanostructure","authors":"Li Wen,&nbsp;Mao-Wang Lu,&nbsp;Jia-Li Chen,&nbsp;Sai-Yan Chen,&nbsp;Xue-Li Cao,&nbsp;An-Qi Zhang","doi":"10.1016/j.cjph.2024.11.004","DOIUrl":"10.1016/j.cjph.2024.11.004","url":null,"abstract":"<div><div>With the help of atomic-layer doping technology, we theoretically explore how to use a δ-potential to manipulate a temporal electron-spin splitter (TESS), which is based on a spin-orbit-coupling (SOC) modulated magnetic nanostructure. Due to the SOC, the dwell time still depends on electron spins even if a δ-doping is embedded inside the TESS. Moreover, both the magnitude and sign of spin polarization ratio can be controlled by tuning the weight or position of the δ-doping. Therefore, a structurally manipulable TESS device can be obtained for semiconductor spintronic device applications.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1275-1282"},"PeriodicalIF":4.6,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous cooling of high-frequency difference resonators through voltage modulation and intracavity-squeezed light","authors":"Liang Wang ,&nbsp;Wei Zhang ,&nbsp;Tie Wang ,&nbsp;Shutian Liu ,&nbsp;Shou Zhang ,&nbsp;Hong-Fu Wang","doi":"10.1016/j.cjph.2024.10.033","DOIUrl":"10.1016/j.cjph.2024.10.033","url":null,"abstract":"<div><div>We propose a scheme to achieve simultaneous cooling of the mechanical and radio-frequency resonators in a hybrid optoelectromechanical system. By introducing the voltage modulation switch and intracavity-squeezed light, the high-frequency difference resonators can be successfully cooled to their quantum ground states by eliminating cavity mode dissipation through precise phase and amplitude matching of the squeezed pump field and the cooling optical field. More significantly, ground-state cooling can be achieved even in the highly unresolved sideband regime, and the quantum backaction heating can be effectively suppressed, leading to a significant improvement in cooling performance. Our work provides an alternative approach for quantum coherent manipulation of multiple mechanical systems with different resonant frequencies.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1240-1252"},"PeriodicalIF":4.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamical analysis and hardware verification of a new multistable memristive hyperchaotic map","authors":"Qiang Lai ,&nbsp;Chongkun Zhu ,&nbsp;Luigi Fortuna","doi":"10.1016/j.cjph.2024.10.031","DOIUrl":"10.1016/j.cjph.2024.10.031","url":null,"abstract":"<div><div>In this paper, a three-dimensional (3D) memristive hyperchaotic map is designed by coupling discrete memristor (DM). Structurally, the map features the existence of infinite fixed points. Based on the differential setting of parameters for various initial values, it can produce an infinite number of heterogeneous coexisting attractors or homogeneous coexisting attractors. Simultaneously, it can realize the attractors symmetric control. The numerical analysis and simulation results highlight its rich dynamical behaviors and excellent performance. A digital hardware platform based on a microcontroller is designed, clearly demonstrating the efficacy of the design through distinct visualization of attractors on an oscilloscope, providing tangible evidence of the successful hardware platform implementation.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1207-1216"},"PeriodicalIF":4.6,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrahigh quality factor cavity based on double dielectric nanocylinder metasurfaces","authors":"Seokhyeon Hong,&nbsp;Youngsoo Kim,&nbsp;Seung Hyeon Hong,&nbsp;Bokyung Kim,&nbsp;Soon-Hong Kwon","doi":"10.1016/j.cjph.2024.10.036","DOIUrl":"10.1016/j.cjph.2024.10.036","url":null,"abstract":"<div><div>An optical cavity with a high quality factor (Q-factor) is essential for a wide range of applications, including lasers, single-photon sources, optical filters, and sensors. A high Q-factor cavity can enhance the interaction between light and materials, thereby improving the performance of optical devices. The Fabry–Pérot (FP) cavity is a typical optical device capable of achieving a high Q-factor; however, it often relies on distributed Bragg reflectors, which increase the size of the optical device. In recent years, Mie scattering-based metasurfaces with high reflectivity have been studied as alternatives to distributed Bragg reflectors. We propose a scattering-based FP cavity consisting of two metasurface layers. In our structure, a FP cavity with high reflectivity is formed by back-forward scattering from a single dielectric cylinder array. Our findings show that the structure exhibits a Q-factor of 4.36 × 10¹⁰ when the period and gap size are 658.8 nm and 740 nm, respectively. This high Q-factor is maintained even with misalignment between the two layers. Additionally, we confirmed that a high Q-factor of 2.6 × 10⁶ appears in the low-index substrate structure, with the Q-factor increasing with the number of double cylinders in the finite structure. We also observed a strong directionality in the z-axis direction when examining the far field. We designed the dielectric FP cavity with a subwavelength thickness, is expected to significantly contribute to enhancing the Q-factors of various types of optical cavities.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1133-1143"},"PeriodicalIF":4.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Systematic study of α-decay in neutron-deficient nuclei","authors":"M. Ismail,&nbsp;A. Adel,&nbsp;A.Y. Ellithi,&nbsp;M.A. Abbas","doi":"10.1016/j.cjph.2024.10.029","DOIUrl":"10.1016/j.cjph.2024.10.029","url":null,"abstract":"<div><div>The <span><math><mi>α</mi></math></span>-decay half-lives of 266 neutron-deficient nuclei in the 52 <span><math><mrow><mo>≤</mo><mi>Z</mi><mo>≤</mo></mrow></math></span> 118 range are calculated within the density-dependent cluster model. The realistic Michigan three-range Yukawa-Paris nucleon–nucleon interaction is used to calculate the <span><math><mi>α</mi></math></span>-core interaction potential within the double-folding model (DFM) context. In addition to the double-folding model, four analytical formulas are employed to compute the half-life time for the neutron-deficient nuclei. The obtained results from the five theoretical approaches are compared to the most recent experimental data. The calculated results from the DFM and the universal decay law (UDL) were in good agreement with the experimental data. A universal curve for <span><math><mi>α</mi></math></span>-decay of neutron-deficient nuclei has been analyzed, illustrating the correlation between the decimal logarithm of the experimental half-lives and the negative decimal logarithm of penetrability. We studied the variation of <span><math><mrow><msub><mrow><mo>log</mo></mrow><mrow><mn>10</mn></mrow></msub><mi>T</mi></mrow></math></span> with the neutron number of the daughter nuclei, <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>d</mi></mrow></msub></math></span>, for different neutron-deficient isotopes in the range 78 <span><math><mrow><mo>≤</mo><mi>Z</mi><mo>≤</mo></mrow></math></span> 92. We attempt to predict the neutron energy levels for each isotope from the behavior of <span><math><mrow><msub><mrow><mo>log</mo></mrow><mrow><mn>10</mn></mrow></msub><mi>T</mi></mrow></math></span> against <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>d</mi></mrow></msub></math></span>. Moreover, the impact of higher-multipolarity deformations, up to hexacontratetrapole, on the behavior of <span><math><mi>α</mi></math></span>-decay half-lives around the neutron shell closure <span><math><mrow><mi>N</mi><mo>=</mo><mn>126</mn></mrow></math></span> is investigated, both with and without including octupole deformation.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1097-1120"},"PeriodicalIF":4.6,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"(2+1)-dimensional Burgers equation with a Caputo fractional derivative: Lie symmetry analysis, optimal system, exact solutions and conservation laws","authors":"Yapeng Shi ,&nbsp;Yuqiang Feng ,&nbsp;Jicheng Yu ,&nbsp;Jun Jiang","doi":"10.1016/j.cjph.2024.10.026","DOIUrl":"10.1016/j.cjph.2024.10.026","url":null,"abstract":"<div><div>In this paper, the Lie group method is applied to analyze the (2+1)-dimensional Burgers equation with Caputo fractional derivative. The infinitesimal generators of the equation are investigated. Then, using the Lie point symmetry of the equation, a one-dimensional optimal system is constructed. Subsequently, within the framework of the optimal system, the equation is symmetrically simplified and the exact solutions of the original equation are determined using the invariant subspace method and the homogeneous balance method. In the process of simplifying the equation to a (1+1)-dimensional fractional differential equation, it is deliberately avoided to use complex Erdélyi-Kober fractional derivative operator. Instead, a simple transformation is utilized to obtain a low-dimensional fractional differential equation. Finally, based on the concept of nonlinear self-adjointness, the conservation laws of the fractional differential equation are obtained.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1121-1132"},"PeriodicalIF":4.6,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the low-energy electromagnetic dipole modes in 151,153,155Sm Nuclei","authors":"E. Tabar,&nbsp;G. Hoşgör,&nbsp;H. Yakut,&nbsp;E. Kemah,&nbsp;Y. Karademirci Kömürcü","doi":"10.1016/j.cjph.2024.10.030","DOIUrl":"10.1016/j.cjph.2024.10.030","url":null,"abstract":"<div><div>The recently observed low-energy magnetic dipole (<em>M</em>1) and electric dipole (<em>E</em>1) excitations in deformed ^151,153,155Sm are theoretically analysed. Rotational Invariant (RI-) and Translational-Galilean Invariant (TGI-) Quasiparticle Nuclear Model (QPNM) are used in the calculation of <em>M</em>1 and <em>E</em>1 properties, respectively. Both theories consider monopole pairing between nucleons, and the deformed Woods-Saxon potential is used as the mean-field potential. Pyatov's symmetry restoration procedure is applied in these models to eliminate the spurious modes from the intrinsic nuclear excitations. Model calculations show that although <em>E</em>1 transitions dominate the low-energy dipole spectra of ^151,153,155Sm, many low-lying <em>M</em>1 transitions exist in these nuclei. It is shown that the most significant contribution to <em>E</em>1 and <em>M</em>1 excitation comes from Δ<em>K</em>=±1 transitions. The theory satisfactorily reproduces the gross features of low-lying dipole modes determined from the Oslo Method analysis of the experimental spectra.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1158-1173"},"PeriodicalIF":4.6,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Migration of a slip-spin solid spherical particle in a micropolar fluid-filled circular cylindrical tube","authors":"Ahmed G. Salem","doi":"10.1016/j.cjph.2024.10.024","DOIUrl":"10.1016/j.cjph.2024.10.024","url":null,"abstract":"<div><div>A combined study analytically and numerically for the axially symmetric creeping flow due to a slip-spin solid sphere surface moving in a microstructure fluid of micropolar type along the centreline of a circular cylindrical tube is introduced. This investigation was presented under low Reynolds number conditions. A general solution is obtained by superposing the essential solutions in both spherical and cylindrical coordinates to solve the Eringen micropolar field equations. The condition of the microrotation, along with couple stress, is used at the surface of the solid particle; while the microrotation is used at the inner cylindrical surface. Boundary conditions are imposed initially on the inner cylindrical surface using Fourier transforms and subsequently on the outer surface of the solid particle using a collocation technique. This paper aims to study the wall interaction problem of a translating slip-spin solid spherical particle in a micropolar fluid along the centreline of a circular cylindrical tube. The study also investigates the effect of the addition of slip conditions for velocity and microrotation on the surface of a solid particle. There is good convergence in the numerical findings obtained for the normalised hydrodynamic drag force (the tube-corrected factor) applying on the surface of the solid particle for several values of the micropolarity coefficient, slip-spin coefficients, and the ratio between the radius of the solid particle and tube. Regarding the flow of a solid spherical particle along the centreline of a cylindrical tube, our drag findings compare favourably to the solutions found in the literature. We found that the normalised drag force acting on the solid particle monotonically increases with the increase of the particle-to-tube radius ratio and reaches infinity in the limitless, with the increase of the micropolarity coefficient, and with the increase of the slip-spin coefficients for a steady ratio of particle-to-tube radius.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1144-1157"},"PeriodicalIF":4.6,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-phase lag model for thermal conductivity of a thermo-viscoelastic porous medium","authors":"Montaser Fekry ,&nbsp;Mohamed I.A. Othman","doi":"10.1016/j.cjph.2024.10.025","DOIUrl":"10.1016/j.cjph.2024.10.025","url":null,"abstract":"<div><div>This paper investigates the propagation of waves and the thermal behavior in a thermo-viscoelastic porous medium using the three-phase-lag (TPL) model which accounts for phase lags in the heat flux vector, temperature gradient and thermal displacement gradient. The study aims to capture the interactions between thermal, mechanical, and structural properties of the thermo-viscoelastic porous, isotropic, homogeneous medium. The governing equations, incorporating the TPL heat conduction law and constitutive relations for the viscoelastic porous material, are derived and analyzed. The impact of relaxation times, porosity, and viscoelastic parameters on heat propagation is investigated through analytical solutions by normal modal analysis. Analytical representations of various physical quantities (stresses components, displacements, temperature,…) in the material's domain are derived. These expressions are then assessed numerically for a specific material, with the outcomes depicted graphically. A comparison is made between the predictions of the three-phase-lag (TPL), the dual-phase-lag (DPL) and Lord–Shulman (L–S) theories in the absence and presence of voids.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1253-1266"},"PeriodicalIF":4.6,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}