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中国物理B（英文版）
中国物理B（英文版）

欧阳钟灿

月刊

1674-1056

010-82649026 82649519

100080

北京603信箱

中国物理B（英文版）/Journal Chinese Physics　BCSCDCSTPCD北大核心EISCI
查看更多>>该刊与《物理学报》是中国物理学会主办的物理学英文和中文的综合性国际学术月刊。刊登物理学科领域中，国内外未曾公开发表的具有创新性的科学研究最新成果。内容包括物理学各领域的理论、实验技术及应用。两刊内容不重复。两刊以论文水平高、创新性强，发表速度快的特点，受到国内外物理学工作者的好评和关注。被国际著名的SCI等10种以上检索系统收录。曾多次被评为中国科学院优秀期刊一等奖，1999，2003，2005年荣获第一、第二和第三届国家期刊奖，2001年被国家新闻出版总署评为“中国期刊方阵”中的双高（高知名度、高学术水平）期刊。2001，2002，2003年两刊都评为百种中国杰出期刊。
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    Presentation of the Berry-Tabor conjecture in Lévy plates

    李超侯国林
    271-279页
    查看更多>>摘要：The Berry-Tabor(BT)conjecture is a famous statistical inference in quantum chaos,which not only establishes the spectral fluctuations of quantum systems whose classical counterparts are integrable but can also be used to describe other wave phenomena.In this paper,the BT conjecture has been extended to Lévy plates.As predicted by the BT conjecture,level clustering is present in the spectra of Lévy plates.The consequence of level clustering is studied by introducing the distribution of nearest neighbor frequency level spacing ratios P((～r)),which is calculated through the analytical solution obtained by the Hamiltonian approach.Our work investigates the impact of varying foundation parameters,rotary inertia,and boundary conditions on the frequency spectra,and we find that P((～r))conforms to a Poisson distribution in all cases.The reason for the occurrence of the Poisson distribution in the Lévy plates is the independence between modal frequencies,which can be understood through mode functions.
      原文链接:
    • 万方数据

    Image encryption algorithm based on multiple chaotic systems and improved Joseph block scrambling

    牟定康董玉民
    280-290页
    查看更多>>摘要：With the rapid development of digital information technology,images are increasingly used in various fields.To ensure the security of image data,prevent unauthorized tampering and leakage,maintain personal privacy,and protect intellectual property rights,this study proposes an innovative color image encryption algorithm.Initially,the Mersenne Twister algorithm is utilized to generate high-quality pseudo-random numbers,establishing a robust basis for subsequent operations.Subsequently,two distinct chaotic systems,the autonomous non-Hamiltonian chaotic system and the tent-logistic-cosine chaotic mapping,are employed to produce chaotic random sequences.These chaotic sequences are used to control the encoding and decoding process of the DNA,effectively scrambling the image pixels.Furthermore,the complex-ity of the encryption process is enhanced through improved Joseph block scrambling.Thorough experimental verification,research,and analysis,the average value of the information entropy test data reaches as high as 7.999.Additionally,the average value of the number of pixels change rate(NPCR)test data is 99.6101％,which closely approaches the ideal value of 99.6094％.This algorithm not only guarantees image quality but also substantially raises the difficulty of decryption.
      原文链接:
    • 万方数据
    • 维普

    Statistical properties of ideal photons in a two-dimensional dye-filled spherical cap cavity

    成泽
    291-302页
    查看更多>>摘要：Within the framework of quantum statistical mechanics,we have proposed an exact analytical solution to the problem of Bose-Einstein condensation(BEC)of harmonically trapped two-dimensional(2D)ideal photons.We utilize this ana-lytical solution to investigate the statistical properties of ideal photons in a 2D dye-filled spherical cap cavity.The results of numerical calculation of the analytical solution agree completely with the foregoing experimental results in the BEC of harmonically trapped 2D ideal photons.The analytical expressions of the critical temperature and the condensate fraction are derived in the thermodynamic limit.It is found that the 2D critical photon number is larger than the one-dimensional(1D)critical photon number by two orders of magnitude.The spectral radiance of a 2D spherical cap cavity has a sharp peak at the frequency of the cavity cutoff when the photon number exceeds the critical value determined by a temperature.
      原文链接:
    • 万方数据
    • 维普

    Third-order nonlinear wavelength conversion in chalcogenide glass waveguides towards mid-infrared photonics

    韩锋博顾佳新黄璐王航...
    303-309页
    查看更多>>摘要：The increasing demand in spectroscopy and sensing calls for infrared(mid-IR)light sources.Here,we theoretically investigate nonlinear wavelength conversion of Ge28Sb12Se60 chalcogenide glass waveguide in the mid-IR spectral regime.With waveguide dispersion engineering,we predict generation of over an octave wavelength(2.8 μm-5.9 μm)tuning range Raman soliton self-frequency shift,over 2.5 octaves wavelength cover range supercontinuum(1.2 μm-8.0 μm),as well as single soliton Kerr comb generated in suspended Ge28Sb12Se60 waveguide.Our findings evidenced that Ge28Sb12Se60 chalcogenide glass waveguides can simultaneously satisfy the generation of Raman soliton self-frequency shift,supercon-tinuum spectrum,and Kerr frequency comb generation through dispersion engineering towards mid-IR on chip.
      原文链接:
    • 万方数据
    • 维普

    Broadband third-order optical nonlinearities of layered franckeite towards mid-infrared regime

    徐志强周甜甜李洁刘东阳...
    310-317页
    查看更多>>摘要：The study of nonlinear optical responses in the mid-infrared(mid-IR)regime is essential for advancing ultrafast mid-IR laser applications.However,nonlinear optical effects under mid-IR excitation are rarely reported due to the lack of suitable nonlinear optical materials.The natural van der Waals heterostructure franckeite,known for its narrow bandgap and stability in air,shows great potential for developing mid-IR nonlinear optical devices.We have experimentally demonstrated that layered franckeite exhibits a broadband wavelength-dependent nonlinear optical response in the mid-IR spectral region.Franckeite nanosheets were prepared using a liquid-phase exfoliation method,and their nonlinear optical response was characterized in the spectral range of 3000 nm to 5000 nm.The franckeite nanosheets exhibit broadband wavelength-dependent third-order nonlinearities,with nonlinear absorption and refraction coefficients estimated to be about 10-7 cm/W and 10-11 cm2/W,respectively.Additionally,a passively Q-switched fluoride fiber laser operating around a wavelength of 2800 nm was achieved,delivering nanosecond pulses with a signal-to-noise ratio of 43.6 dB,based on the nonlinear response of franckeite.These findings indicate that layered franckeite possesses broadband nonlinear optical characteristics in the mid-IR region,potentially enabling new possibilities for mid-IR photonic devices.
      原文链接:
    • 万方数据
    • 维普

    Three-dimensional topological crystalline insulator without spin-orbit coupling in nonsymmorphic photonic metacrystal

    余智德夏凌波
    318-323页
    查看更多>>摘要：By including certain point group symmetry in the classification of band topology,Fu proposed a class of three-dimensional topological crystalline insulators(TCIs)without spin-orbit coupling in 2011.In Fu's model,surface states(if present)doubly degenerate at(-Γ)and(M)when time-reversal and C4 symmetries are preserved.The analogs of Fu's model with surface states quadratically degenerate at(M)are widely studied,while surface states with quadratic degeneracy at(-Γ)are rarely reported.In this study,we propose a three-dimensional TCI without spin-orbit coupling in a judiciously designed nonsymmorphic photonic metacrystal.The surface states of photonic TCIs exhibit quadratic band degeneracy in the(001)surface Brillouin zone(BZ)center((-Γ)point).The gapless surface states and their quadratic dispersion are protected by C4 and time-reversal symmetries,which correspond to the nontrivial band topology characterized by Z2 topological invariant.Moreover,the surface states along lines from(-Γ)to the(001)surface BZ boundary exhibit zigzag feature,which is interpreted from symmetry perspective by building composite operators constructed by the product of glide symmetries with time-reversal symmetry.The metacrystal array surrounded with air possesses high order hinge states with electric fields highly localized at the hinge that may apply to optical sensors.The gapless surface states and hinge states reside in a clean frequency bandgap.The topological surface states emerge at the boundary of the metacrystal and perfect electric conductor(PEC),which provide a pathway for topologically manipulating light propagation in photonic devices.
      原文链接:
    • 万方数据
    • 维普

    Ultra-broadband and wide-angle reflective terahertz polarization conversion metasurface based on topological optimization

    张亚杰李潮龙栾迦淇赵茗...
    324-332页
    查看更多>>摘要：Terahertz polarization conversion devices have significant potential applications in various fields such as terahertz imaging and spectroscopy.In this paper,we utilize genetic algorithms to topologically optimize the metasurface unit cells and design a reflective linear polarization conversion metasurface with ultra-broadband and wide-angle characteristics.By partitioning the metallic pattern layer into quadrants,the encoding length is effectively reduced,resulting in a shorter optimization time.The research results indicate that the converter possesses a polarization conversion efficiency ratio higher than 90％and a relative bandwidth ratio of 125％in a range of 0.231-0.995 THz.Meanwhile,it can maintain excellent polarization conversion properties when the incident angle of terahertz waves is less than 45° and the polarization angle is less than 15°,demonstrating excellent practicality.New insights are provided for the design of terahertz wide-angle ultra-wideband polarization conversion devices,and the proposed metasurfce has potential applications in terahertz polarization imaging,spectroscopy and communication fields.
      原文链接:
    • 万方数据
    • 维普

    Inverse design of nonlinear phononic crystal configurations based on multi-label classification learning neural networks

    黄坤琦林懿然赖耘刘晓宙...
    333-340页
    查看更多>>摘要：Phononic crystals,as artificial composite materials,have sparked significant interest due to their novel characteristics that emerge upon the introduction of nonlinearity.Among these properties,second-harmonic features exhibit potential applications in acoustic frequency conversion,non-reciprocal wave propagation,and non-destructive testing.Precisely manipulating the harmonic band structure presents a major challenge in the design of nonlinear phononic crystals.Tradi-tional design approaches based on parameter adjustments to meet specific application requirements are inefficient and often yield suboptimal performance.Therefore,this paper develops a design methodology using Softmax logistic regression and multi-label classification learning to inversely design the material distribution of nonlinear phononic crystals by exploiting information from harmonic transmission spectra.The results demonstrate that the neural network-based inverse design method can effectively tailor nonlinear phononic crystals with desired functionalities.This work establishes a mapping relationship between the band structure and the material distribution within phononic crystals,providing valuable insights into the inverse design of metamaterials.
      原文链接:
    • 万方数据
    • 维普

    Ultrasonic scalpel based on fusiform phononic crystal structure

    王莎单俊杰林书玉
    341-350页
    查看更多>>摘要：In response to the ultrasonic scalpels with the vibrational modal coupling which leads to a decrease in efficiency,an ultrasonic scalpel based on fusiform phononic crystals(PnCs)is proposed.An accurate theoretical model is constructed,which is mainly composed of electromechanical equivalent circuit models to analyze the frequency response function and the frequency response curves of the admittance.Bragg band gaps exist in the fusiform PnCs owing to the periodic con-straint,which can suppress the corresponding vibrational modes.The vibration characteristics(vibration mode,frequency,and displacement distribution)of the ultrasonic scalpel are analyzed,and the validity of the electromechanical equivalent circuit method is verified.The results indicate that other vibration modes near the working frequency can be isolated.In addition,blades based on fusiform PnCs have a function akin to that of the horn,which enables displacement amplification.
      原文链接:
    • 万方数据
    • 维普

    Casson hybrid nanofluid flow over a Riga plate for drug delivery applications with double diffusion

    Abeer S.AlnahdiTaza Gul
    351-361页
    查看更多>>摘要：Casson fluid-mediated hybrid nanofluids are more effective at transferring heat than traditional heat transfer fluids in terms of thermal conductivity.Heat exchangers,cooling systems and other thermal management systems are ideal for use with Casson fluids.Precise control of the flow and release of medication is necessary when using Casson fluids in drug delivery systems because of their unique rheological properties.Nanotechnology involves the creation of nanoparticles that are loaded with drugs and distributed in Casson fluid-based carriers for targeted delivery.In this study,to create a hybrid nanofluid,both single-walled carbon nanotubes(SWCNTs)and multi-walled carbon nanotubes(MWCNTs)are dispersed in a Casson fluid with Fourier's and Fick's laws assumptions.The Casson fluid is suitable for various engineering and medical applications due to the enhancement of heat transfer and thermal conductivity by the carbon nanotubes.Our objective is to understand how SWCNTs and MWCNTs impact the flow field by studying the flow behavior of the Casson hybrid nanofluid when it is stretched against a Riga plate.The Darcy-Forchheimer model is also used to account for the impact of the porous medium near the stretching plate.Both linear and quadratic drag terms are taken into account in this model to accurately predict the flow behavior of the nanofluid.In addition,the homotopy analysis method is utilized to address the model problem.The outcomes are discussed and deliberated based on drug delivery applications.These findings shed valuable light on the flow characteristics of a Casson hybrid nanofluid comprising SWCNTs and MWCNTs.It is observed that the incorporation of carbon nanotubes makes the nanofluid a promising candidate for medical applications due to its improved heat transfer properties.
      原文链接:
    • 万方数据