By combining transformation optics and van der Waals layered materials, an invisibility concentrator with a thin layer of α-MoO wrapping around a cylinder is proposed. It inherits the effects of invisibility and energy concentration at Fabry-Pérot resonance frequencies, with tiny scattering. Due to the natural in-plane hyperbolicity in α-MoO, the challenges of experimental complexity and infinite dielectric constant can be resolved perfectly. Through analytical calculation and numerical simulations, the relevant functionalities including invisibility, energy concentration and illusion effect of the designed device are confirmed, which provides guidelines for the subsequent experimental verification in future.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11501466 | PMC |
| http://dx.doi.org/10.1515/nanoph-2021-0557 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Realizing the multifunctional metamaterial for fluid flow in a porous medium.
Proc Natl Acad Sci U S A
December 2022
Department of Physics, The Chinese University of Hong Kong, Hong Kong, China.
Metamaterials are artificial materials that can achieve unusual properties through unique structures. In particular, their "invisibility" property has attracted enormous attention due to its little or negligible disturbance to the background field that avoids detection. This invisibility feature is not only useful for the optical field, but it is also important for any field manipulation that requires minimum disturbance to the background, such as the flow field manipulation inside the human body.
View Article and Find Full Text PDFInvisibility concentrator based on van der Waals semiconductor α-MoO.
Nanophotonics
January 2022
Department of Physics and Institute of Electromagnetics and Acoustics, Xiamen University, Xiamen 361005, China.
By combining transformation optics and van der Waals layered materials, an invisibility concentrator with a thin layer of α-MoO wrapping around a cylinder is proposed. It inherits the effects of invisibility and energy concentration at Fabry-Pérot resonance frequencies, with tiny scattering. Due to the natural in-plane hyperbolicity in α-MoO, the challenges of experimental complexity and infinite dielectric constant can be resolved perfectly.
View Article and Find Full Text PDFThe required acoustic parameters simplification of invisibility cloaks and concentrators using the impedance-tunable coordinate transformation.
Sci Rep
January 2021
Department of Electronics Engineering, Nanjing Xiaozhuang University, Nanjing, 211171, People's Republic of China.
Transformation acoustics, as an unconventional theory, provides a powerful tool to design various kinds of acoustic devices with excellent functionalities. However, the required ideal parameters, which are prescribed by the method, are both complex and hard to implement-even using acoustic metamaterials. Furthermore, simplified parameter materials are generally favored in transformation-acoustic design due to its easier realization with artificial structures.
View Article and Find Full Text PDFExperimental Realization of an Extreme-Parameter Omnidirectional Cloak.
Research (Wash D C)
August 2019
Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
An ideal transformation-based omnidirectional cloak always relies on metamaterials with extreme parameters, which were previously thought to be too difficult to realize. For such a reason, in previous experimental proposals of invisibility cloaks, the extreme parameters requirements are usually abandoned, leading to inherent scattering. Here, we report on the first experimental demonstration of an omnidirectional cloak that satisfies the extreme parameters requirement, which can hide objects in a homogenous background.
View Article and Find Full Text PDFConcentrators for Water Waves.
Phys Rev Lett
September 2018
Institute of Electromagnetics and Acoustics and Department of Electronic Science, Xiamen University, Xiamen 361005, China.
By introducing concepts from transformation optics to the manipulation of water waves, we design and experimentally demonstrate two annular devices for concentrating waves, which employ gradient depth profiles based on Fabry-Pérot resonances. Our measurements and numerical simulations confirm the concentrating effect of the annular devices and show that they are effectively invisible to the water waves. We show that transformation optics is thus an effective framework for designing devices to improve the efficiency of wave energy collection, and we expect potential applications in coastline ocean engineering.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!