Pages

Research

Collaborators

KAUST Prof. Xixiang Zhang Stanford University Prof. George Papanicolaou Hong Kong University of Science and Technology Prof. Zhaoqing Zhang, Prof. Ping Sheng, Prof. C. T. Chan Wuhan University Prof. Zhengyou Liu, Prof. Chunyin Qiu South China University of Technology Prof. Jun Mei, Prof. Zhilin Hou Soochow University Prof. Yun Lai

Effective medium theory

We applied the coherent potential approximation, multiple-scattering theory methods to derive effective medium theories for photonic/phononic crystals and metamaterials. In particular, we studied the finite frequency behavior of a metamaterial, tight-packing limit of a phoXonic crystal, and anisotropic property for rectangular and rhombus structures.

Metamaterials

We developed a new type of elastic metamaterial, which blurs the distinction between the fluids and solids over certain frequency regime and also exhibits super-anisotropic behavior at other frequencies.

Phononic crystals: Rotational modes

We developed a lumped model for rotational modes in phononic crystals. It reveals the origin of the rotation modes, and provides a simple understanding of the mechanism.

Photonic/Phononic crystals: Classical analogue of Dirac cones

We offered a “selection rule” to examine the linearity of the dispersion, predicted the slope of the linear dispersion accurately, and clarified the concepts of the Dirac cone and the Dirac-like cone.

Research

Our research foci are: Numerical solutions to wave equation: Wave functional materials: Metamaterials: artificial materials engineered to have properties that may not be found in nature; Photonic/phononic crystals: structured materials with periodic modulations in their physical parameters. Effective medium theory: Effective medium at finite frequencies: breaks the quasi-static limit and works for resonances; Effective medium with "extreme" parameters: when the filling-ratio is extremely high. Waves in random media: Transport behavior: coherent and diffusive transition, energy equilibration

Waves in random media and time reversal

We studied the diffusive behavior and energy equilibration in a randome elastic media. Developed the sparse matrix canonical grid method to deal with large-scale systems. We also investigated the imaging through complex media and explored the resolution limit.

Info

Contact Us

Mailing address: Ying Wu PO BOX # 2855 Division of Computer, Electrical and Mathematical Sciences and Engineering King Abdullah University of Science and Technology Thuwal 23955-6900, Saudi Arabia Office: Building 1 (Al-Khawarizmi), Level 4, Room 4104 (Sea side) Tel: +966-2-8080432 Email: ying.wu@kaust.edu.sa

Join Us

Various opportunities are available in our group There are several positions available for post-doctoral research associates and graduate students in our group. The positions are offered mainly in two areas: wave functional materials: focus on photonic/phononic crystals, metamaterials waves in random media: focus on imaging, time-reversal, and large-scale calculation The requirements for each role: Post-doctoral research fellow: Should possess a Ph.D. in mathematics, physics, electrical engineering, material sciences or related fields. Should have a solid background in classical wave

Links

Research related data base and journal websites Web of Science Nature Publishing Group Science American Physical Society American Insititue of Physics Institute of Physics Journal of Acoustic Society of America Optical Express and Optics Letters arXiv Other groups' websites and useful links KAUST Prof. X Zhang's Lab Prof. D R Smith's Lab Prof. S C Zhang's Lab Nanjing Univ HKUST CAS Grant & Proposals discussion forum (in Chinese) Science blog (in Chinese)

Publications

Publications

Peer-reviewed journal publications (Reverse Chronological Order, *denotes corresponding author). Rfaqat Ali, Ying Wu " Enantioselective transport of chiral spheres using focused femtosecond laser pulses" Opt. Express 31, 29716-29729 (2023) Waqas W. Ahmed, Mohamed Farhat, Pai-Yen Chen, Xiangliang Zhang, Ying Wu “ A Generative deep learning approach for shape recognition of arbitraryobjects from phaseless acoustic scattering data" Advanced Intelligent Systems. 5, 2200260 (2023) Mohamed Farhat, Pai-Yen Chen, Ying Wu “ Sound Waveguiding by Spinning: An Avenue toward Unidirectional Acoustic

Teaching

Teaching

AMCS 201 Applied Mathematics I ( Fall 2011, Fall 2012, Fall 2013, Summer 2014, Summer 2015, Fall 2015) AMCS 353 Advanced Topics in Wave Propagation (Spring 2012, Spring 2013, Spring 2014) Registered students can access the course material via Blackboard.

Front Page

Waves in Complex Media Research Group

Professor Ying Wu leads the so-called WCM research group, which stands for Waves in Complex Media Research Group Our group is dedicated to the multidisciplinary areas that are related to wave, from mathematics to material sciences, from theory to simulation, from modeling to algorithms. We focus on the theoretical exploration and numerical simulation of classical wave propagation in complex systems, such as periodic structures and random media. The main research interests are wave functional materials, time reversal, homogenization of heterogeneous media, numerical solutions to wave equation

Other

News Archive

Paper accepted by New J Phys, 11/22/2017, In collaboration with Prof. Jun Mei's group, we studied the topological phases in water wave systems. Prof. Badreddine Assouar is visiting us, 11/19/2017, Prof. Badreddine Assouar from France is visiting us this week. He will give a seminar on Monday afternoon. Paper accepted by Scientific Reports, 11/8/2017, In this paper, we discussed the high directivity of acoustic source emission by an acoustic metamaterial. Paper accepted by Acta Physica Sinica, 11/3/2017, In this paper, we discussed the multiple topological phases in phononic crystals