metamaterials

Waves Functional Materials - 2019-09-15

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B9 L2 H1 R2322

Wave functional materials are artificial materials that can control wave propagation as wished. In this talk, I will give a brief review of the progress of wave functional materials and reveal the secret behind the engineering of these materials to achieve desired properties.

Light management in non-Hermitian media

Dr. Waqas Ahmed, Electrical Engineering, King Abdullah University of Science and Technology

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KAUST

Structured media provide the momentum compensation for the scattering of waves. It is well-known that nano-scale modulations of the refractive index may lead to a temporal and spatial control over light propagation. Yet, also engineering the gain and loss profile uncovers analogous shaping effects. However, only the interplay between both the refractive index and gain and loss modulations introduces unidirectionality in light management. Thus, non-Hermitian optics has become one of the most fertile grounds in optics. A generalized Hilbert transform allows tailoring the two quadratures of the complex permittivity to design periodic or disordered non-Hermitian media, holding either global or local unidirectionality following arbitrary vector fields to tailor the flow of light. The method allows restricting the permittivity within realistic values rendering it suitable for applications.

Ying Wu awarded Phononics Young Investigator 2017

1 min read ·
Prof. Ying Wu received the 2017 Phononics Young Investigator Award as the Phononics community gathered in Changsha, China, for the 4th International Conference on Phononic Crystal/Metamaterials, Phonon Transport/Coupling, and Topological Phononics, on June 4-9 2017.

Dark materials squeeze green fuel from sunlight

1 min read ·
Metallic nanostructures that slow down light dramatically can triple the efficiency of solar-based hydrogen fuel generation.

Zeguo Chen

Master, Nanjing University 2014 Bachelor, Nanjing University 2011 Research Interests Wave propagation in Metamaterials and Phononic Crystals.

Ying Wu

Professor Wu works on theoretical modeling and numerical simulations of classical wave propagation in complex media, including metamaterials, metasurfaces, topological materials and random systems. She is recognized by effective medium theory, perturbation theory for periodic structures with resonances.

Xiujuan Zhang

Ph.D. Student, Waves in Complex Media
​Master, South China University of Technology, 2011-2013 Visiting Student, April 2012 - July 2012 Introduction ​Xiujuan is currently a master candidate at South China University of Technology. She visited our group from April 2012 to July 2012. During her visit, she studied the acoustic waveguide and developed the scattering theory based on eigenfunction expansion. Research Interests Computational physics, Metamaterials, ​Acoustic Waveguides.

Rfaqat Ali

Education and early career Dr. Ali has received M.Sc. and M.Phil. degrees in physics at the department of physics Quaid-i-Azam University Islamabad, Pakistan in 2012 and 2014, respectively. He has concluded his Ph.D. thesis entitled: Novel applications of metamaterials and plasmonics to optical tweezing: directional scattering, chiral resolution and pulling forces in 2020. He has sixteen first author paper including four single author. Research Interests Optical manipulation of chiral sphere using tweezers where we have developed the methods for characterization and chiral resolution of single

Mohamed D. Farhat

Research Scientist, Waves in Complex Media
Mohamed Farhat is currently a Research Scientist at King Abdullah University of Science and technology (KAUST), Thuwal, Saudi Arabia.

Madi Matymov

Ph.D. Student, Waves in Complex Media
Education profile MS/PhD in Applied Mathematics and Computational Science, King Abdullah University of Science and Technology, 2022-prescent BS in Mechanics, L.N. Gumilyov Eurasian National University (ENU), 2018 - 2022 Research Interests Wave propagation, Metamaterials, Machine Learning Introduction Madi Matymov is an MS/PhD student at Waves in Complex Media (WCM) Group in King Abdullah University of Science and Technology (KAUST), studying under the supervision of Professor Ying Wu in her group. Before joining KAUST, Madi had studied at L.N. Gumilyov National University. Apart from that, he

Keqiang Lyu

Ph.D. Student, Waves in Complex Media
Visiting Student, October 2020 - July 2021​ Master, Tongji University, 2017-2020 Bachelor, Anhui University of Technology,2013-2017 Research Interests Phononic Crystals (10010), Metamaterials (302)