Article
Crystallography
Shaobo Zhang, Jiang Liu, Hongbo Zhang, Shuliang Wang
Summary: A novel composite structure HPFC is proposed to address the NVH problem in vehicles, featuring a hollow-stub phononic-crystal plate with filled cylinders. Numerical simulations investigate dispersion curves and the impact of structural parameters, showing advantages in waveguide and phononic band gap for the new design.
Article
Physics, Multidisciplinary
Elisa Will, Luke Masters, Arno Rauschenbeutel, Michael Scheucher, Juergen Volz
Summary: The study demonstrates trapping of a single Rb-85 atom approximately 200 nm away from the surface of a whispering-gallery-mode bottle microresonator, and shows the observation of vacuum Rabi splitting in the excitation spectrum of the atom-resonator system. This first stable and controlled interaction of a single atom with the whispering-gallery mode in the strong coupling regime has potential for implementing quantum protocols and applications utilizing the chiral atom-light coupling in such resonators.
PHYSICAL REVIEW LETTERS
(2021)
Review
Optics
A. E. Zhukov, N. Kryzhanovskaya, E. Moiseev, M. Maximov
Summary: The paper discusses microlasers with emission spectra determined by whispering gallery modes, utilizing various types of In(Ga)As quantum dots. Deep localization of charge carriers helps overcome undesirable effects, enabling the realization of microlasers capable of operating at elevated temperatures without temperature stabilization.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Optics
H. M. de la Cruz, E. D. Hernandez-Campos, E. Ortiz-Ricardo, A. Martinez-Borquez, I. Rosas-Roman, V. Contreras, G. Ramos-Ortiz, B. Mendoza-Santoyo, Cecilia I. Zurita-Lopez, R. Castro-Beltran
Summary: Acoustic levitation is an important contactless manipulation technique in various fields. This study presents an affordable phased-array levitator that can stably trap micrometer dye-doped droplets in the air, enabling the creation of microlasers. The levitated microlasers exhibit comparable optical lasing features to On-a-Chip devices, with a maximum Q-factor of approximately 105 and a minimum lasing threshold of approximately 150 nJ cm-2.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Xing-Yu Wu, Yong Zhang, Yong-Pan Gao, Chuan Wang
Summary: Research on optomagnonic structures has shown that magnon modes located near the edge of microresonators exhibit stronger coupling strength with optical modes, leading to efficient magneto-optical interaction and promoting the development of magneto-optical control, optical-microwave interaction, and optical nonlinearity.
Article
Optics
Xavier Zambrana-Puyalto, Davide D'Ambrosio, Gianluca Gagliardi
Summary: Whispering gallery modes are light modes that arise in cylindrically symmetric structures, with intensity profile strongly confined around the interface. Analytical demonstration shows that the coupling mechanism is related to angular momentum matching between inner WGMs of the sphere and incident beam. The model quantitatively predicts optical coupling efficiency for any tangential position of the incident beam.
LASER & PHOTONICS REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Yang Li, Adrian Diaz, Xiang Chen, David L. McDowell, Youping Chen
Summary: The transient processes of phonon scattering and transmission in Si phononic crystals with periodic pores are simulated using the concurrent atomistic-continuum method. The study reveals the dependence of phonon transport on the relation between the phonon wavelength, period length, and neck width of the phononic crystal. Three distinct regimes of phonon transport are observed, each with different characteristics and dominant modes of transport.
Article
Optics
Xiaoyu Shi, Wanting Song, Dan Guo, Junhua Tong, Tianrui Zhai
Summary: In order to achieve a higher level of secure communication, efforts have been made to develop encryption and anticounterfeiting strategies. One significant approach is the concept of a spectral encryption based on selectively visualized spectral modes in random lasers. By coupling with external whispering gallery mode cavity, hidden localized lasing modes with special multiple-peaks spectra are selected for secure information encryption.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Junhua Tong, Kun Ge, Zhiyang Xu, Tianrui Zhai
Summary: This study reports a switchable WGM lasing device based on phase transition, where the number of WGM lasing modes can be controlled and single-mode lasing can be achieved by manipulating the phase transition. This research has significant potential for various applications.
Article
Optics
Jie Liao, Lan Yang
Summary: Temperature measurement using optical barcodes from whispering-gallery sensors can be greatly improved by simultaneously monitoring different modes of optical signals. This technique overcomes limitations of existing single-mode sensors, providing high-precision and large-dynamic-range temperature measurements.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Jun Ruan, Dan Guo, Ben Niu, Kun Ge, Tianrui Zhai
Summary: This study proposes a gravity-assisted rotatory drawing method for fabricating multicolor lasing microfibers and weaving them into flexible textiles. Full-color tunable lasing textiles can be achieved by regulating the doped dyes and solution viscosity. Furthermore, nanoparticle patterns are printed on the lasing textile for anticounterfeiting application.
NPG ASIA MATERIALS
(2022)
Article
Optics
Y. E. Geints, O. V. Minin, I. V. Minin
Summary: This study presents a miniature pressure sensor based on coupled whispering-gallery mode (WGM) resonators. It utilizes the changes in optical intensity of the WGMs to carry information about the position of the pressure-loaded membrane. The sensor has the advantages of a miniature design and the absence of mechanical contact.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Jing Yan, D. N. Wang, Xin Liu, Jikai Chen
Summary: A low-cost whispering gallery mode tunable microlaser based on dual erbium-doped microspheres was demonstrated in this study, allowing for the tuning of lasing wavelength and emission power by adjusting the pumping laser power.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Zhe Wang, Arun Kumar Mallik, Fangfang Wei, Zhuochen Wang, Anuradha Rout, Qiang Wu, Yuliya Semenova
Summary: A novel tunable whispering gallery modes (WGMs) resonator based on a nematic liquid crystal (LC)-filled capillary and magnetic nanoparticles (MNPs)-coated tapered fiber has been proposed and experimentally demonstrated. Thermo-optic tuning of the WGM resonances has been achieved by controlling the optical pump laser power, showing potential applications in the field of tunable photonic devices and sensors.
Article
Instruments & Instrumentation
Chun Wang, Xiaojuan Zhang, Jiajun Ma, Kang Xie, Junxi Zhang, Zhijia Hu
Summary: This paper utilizes electrospinning technology to prepare PM597-doped polymer fibers with different diameters, and investigates their temperature sensing capabilities by placing them on gold and aluminum substrates. The results reveal that the samples on aluminum substrate exhibit better performance in temperature sensing.
Article
Materials Science, Multidisciplinary
Xinyue Wu, Yabin Jin, Abdelkrim Khelif, Xiaoying Zhuang, Timon Rabczuk, Bahram Djafari-Rouhani
Summary: The study proposes topological metamaterials in the Hertz frequency range, consisting of concrete pillars in a honeycomb lattice on the soil ground. By breaking the inversion symmetry of the unit cell, a non-trivial bandgap is formed, analogous to the quantum valley Hall effect. The robustness of the topological interface between two different crystal phases against defects and disorders is quantitatively analyzed. Additionally, a harvesting energy device is designed using the robust and compact topological edge state, showing functionality in both reducing surface vibration and energy harvesting.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Physics, Applied
Zhihui Wen, Wan Wang, Abdelkrim Khelif, Bahram Djafari-Rouhani, Yabin Jin
Summary: Rapid advances have been made in the properties of metastructures, including phononic crystals, metamaterials, and metasurfaces, with regards to their robustness, high power density, and broadband behavior. These advancements provide unique advantages for energy harvesting devices in meeting technological upgrades in various applied science and engineering applications. This article systematically provides an overview of the mechanisms underlying these properties, considering different wave localization configurations in elastic metastructures for energy harvesting purposes, and discusses future prospects for energy harvesting metastructures.
APPLIED PHYSICS LETTERS
(2022)
Review
Physics, Applied
Yu Cang, Yabin Jin, Bahram Djafari-Rouhani, George Fytas
Summary: This review presents the experimental achievements and applications of phononic crystals in hypersonic waves. The desired structures are realized through microfabrication technologies, and the band structures are characterized for modulation of phonon propagation. Some application-oriented research directions are proposed in terms of advances in fabrication and characterization technologies and the development of electro-optomechanical systems.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Mechanical
Zhihui Wen, Yabin Jin, Penglin Gao, Xiaoying Zhuang, Timon Rabczuk, Bahram Djafari-Rouhani
Summary: The study proposes using phononic thin plate systems for robust energy harvesting application relying on zero-dimensional cavities confined by the Kekule's distorted topological vortices. The harvesting power induced by topological cavities is about 30 times that of the bare plate. Further studies show that the proposed energy harvesting system is highly robust against symmetry-preserving defects and is less influenced even for symmetry-breaking defects at moderate perturbation level.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Physics, Multidisciplinary
Liangshu He, Hongwei Guo, Yabin Jin, Xiaoying Zhuang, Timon Rabczuk, Yan Li
Summary: This study demonstrates how machine learning can be used to study phononic crystal beams through two inverse design schemes. It provides a method for inverse design of structural parameters to maximize the bandgap width and uses a neural network to solve the training difficulty problem and achieve inverse structure design with targeted topological properties.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Materials Science, Multidisciplinary
Xiaoying Zhuang, Chuong Nguyen, S. S. Nanthakumar, Ludovic Chamoin, Yabin Jin, Timon Rabczuk
Summary: This paper presents a methodology for inverse design of reconfigurable topological insulators in plate-like structures. By utilizing topology optimization and piezoelectric patches, the space inversion symmetry is broken, leading to the real-time reconfigurability of topological interfaces for waveguide applications.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Yabin Jin, Shixuan Zeng, Zhihui Wen, Liangshu He, Yong Li, Yan Li
Summary: This study proposes a method of using Archimedean spiral metastructures to achieve low-frequency vibration isolation, and combines a double-layer corrugated sandwich core and two spiral metamaterial plates to achieve lightweight and high static load-bearing properties and deep-subwavelength bandgaps. Machine learning is used to realize on-demand inverse design of metastructures with targeted bandgap properties.
MATERIALS & DESIGN
(2022)
Article
Engineering, Mechanical
Yabin Jin, Yilong Yang, Zhihui Wen, Liangshu He, Yu Cang, Bin Yang, Bahram Djafari-Rouhani, Yong Li, Yan Li
Summary: In this study, we propose a perforated metastructure combining fish-belly panels and a corrugated sandwich structure for broadband sound absorption. We also design the optimal structure using a reinforcement learning algorithm and introduce a figure of merit for a comprehensive evaluation.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Acoustics
Tianyu Gu, Zhihui Wen, Liangshu He, Minle Yu, Yong Li, Yan Li, Yabin Jin
Summary: We study a lightweight metastructure that can simultaneously reduce vibration and noise in a broad low-frequency range through theoretical, numerical, and experimental methods. By introducing spiral slits and micro-perforations in the panel and core plate, respectively, we achieve broadband low-frequency sound absorption and vibration isolation. This multifunctional metastructure provides a new route to design lightweight load-bearing structures with noise and vibration reduction performance for potential applications in aerospace engineering and transportation vehicles.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Acoustics
Xiao Pan, Longsheng Zeng, Yong Li, Xuefeng Zhu, Yabin Jin
Summary: This study numerically and experimentally analyzes FZP lenses around 5 MHz and achieves stable subwavelength underwater sound focusing. The relationship between focal spot size and the ratio of focal length to lens diameter, as well as the relationship between focal length and working frequency, is explored.
Article
Physics, Applied
Wenxin Zhong, Runcheng Cai, Xiaoying Zhuang, Timon Rabczuk, Yan Pennec, Bahram Djafari-Rouhani, Yabin Jin
Summary: The skin effect, which represents the localization of modes at the boundaries of a structure, is demonstrated for elastic waves propagating in a non-Hermitian phononic plate. The plate contains piezoelectric components that act as sensors and actuators. Complex non-reciprocal dispersion curves are calculated and analyzed for any wavevector direction in the two-dimensional space, revealing localization phenomena at different boundaries and corners of a finite square structure. Furthermore, the localized features can be reconfigured by adjusting the non-Hermiticity parameters, providing a feedback control strategy for potential applications in vibration control, energy harvesting, and sensing.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Mechanical
Hai D. Huynh, Xiaoying Zhuang, Harold S. Park, S. S. Nanthakumar, Yabin Jin, Timon Rabczuk
Summary: The Willis coupling, which couples momentum to strain in elastic metamaterials, has been extensively studied for its potential in enabling novel wave propagation phenomena. Recent work has shown that the momentum can also be coupled to electrical stimulus in piezoelectric composites, resulting in a new form of electro-momentum coupling. In this study, a topology optimization approach is presented to maximize the electro-momentum coupling in piezoelectric composites, allowing for the design of composites that support novel wave phenomena excited through non-mechanical means.
EXTREME MECHANICS LETTERS
(2023)
Article
Acoustics
Runcheng Cai, Yabin Jin, Yong Li, Jie Zhu, Hehua Zhu, Timon Rabczuk, Xiaoying Zhuang
Summary: In this study, we investigate the Parity-Time (PT) symmetric metaplate with balanced loss and gain, and achieve coherent perfect absorption and lasing effects for flexural waves. We also explore the exceptional points (EP) as thresholds of phase transitions and realize unidirectional reflectionless behavior for incident waves by adjusting circuit parameters. Our study provides insights into the origins and sensitivities of non-Hermitian exceptional points for elastic waves.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Physics, Multidisciplinary
Liangshu He, Yan Li, Bahram Djafari-Rouhani, Yabin Jin
Summary: Recently, the evolution of Weyl point in Weyl semimetals with nonhermiticity has attracted much research interest. In this study, we investigate the propagation of elastic flexural waves in a phononic beam containing piezoelectric materials and introduce nonhermiticity through active regulation of external circuits. By considering a synthetic parameter space, we demonstrate the emergence of a double Weyl point (DWP) at the band crossing. We further examine the evolution of the DWP from hermitic to nonhermitic situations and observe the formation of Weyl degenerate lines and Weyl hollow rings. Additionally, we analyze the changes in transmission spectra and discuss synthetic Fermi arc interface states. This paper provides insights into the Hermitian and non-Hermitian physics in elastic wave systems using synthetic dimensions.
PHYSICAL REVIEW RESEARCH
(2023)
Review
Nanoscience & Nanotechnology
Yabin Jin, Liangshu He, Zhihui Wen, Bohayra Mortazavi, Hongwei Guo, Daniel Torrent, Bahram Djafari-Rouhani, Timon Rabczuk, Xiaoying Zhuang, Yan Li
Summary: With the growing interest in artificial materials, the demand for advanced functionalities in phononic crystals and acoustic metamaterials is increasing. Machine learning, as an important branch of artificial intelligence, provides a powerful means of achieving efficient and accurate design processes. This review summarizes recent works on the combination of phononic metamaterials and machine learning and provides an outlook on future development directions.
