1.7k citations · 23.2k across the 226 of their papers we have counts for
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An Asymmetric Spoof-Fluid-Spoof Acoustic Waveguide and its Application as a CO Sensor
Nathan Perchikov, Đorđe Vujić, Branimir Bajac +3
We study pressure acoustic propagation in asymmetric spoof-fluid-spoof acoustic waveguides and its potential application in acoustic gas sensors. First, a stable and efficient anal…
Sound non-reciprocity based on synthetic magnetism
Zhaoxian Chen, Zhengwei Li, Jingkai Weng +4
Synthetic magnetism has been recently realized using spatiotemporal modulation patterns, producing non-reciprocal steering of charge-neutral particles such as photons and phonons.…
Remote Water-to-air Eavesdropping through Phase-Engineered Impedance Matching Metasurfaces
Jing-jing Liu, Zheng-wei Li, Bin Liang +2
Efficiently receiving underwater sound remotely from air is a long-standing challenge in acoustics hindered by the large impedance mismatch at the water-air interface. Here we intr…
Observation of Temporal Reflections and Broadband Frequency Translations at Photonic Time-Interfaces
Hady Moussa, Gengyu Xu, Shixiong Yin +3
Time-reflection is a uniform inversion of the temporal evolution of a signal, which arises when an abrupt change in the properties of the host material occurs uniformly in space. A…
Design of High-Q Passband Filters Implemented Through Multipolar All-Dielectric Metasurfaces
Alessio Monti, Andrea Alù, Alessandro Toscano +1
We propose a novel class of ultrathin high Q passband filters designed by properly combining different multipolar resonances sustained by an all dielectric metasurface. A rigorous…
Diffusive Topological Transport in Spatiotemporal Thermal Lattices
Guoqiang Xu, Yihao Yang, Xue Zhou +3
Topological insulating phases are usually found in periodic lattices stemming from collective resonant effects, and it may thus be expected that similar features may be prohibited…
Scalable Metagrating for Efficient Ultrasonic Focusing
Yan Kei Chiang, Li Quan, Yugui Peng +4
Acoustic focusing plays a pivotal role in a wide variety of applications ranging from medical science to nondestructive testing. Previous works have shown that acoustic metagrating…
Radio-Transparent Dipole Antenna Based on a Metasurface Cloak
Jason Soric, Younes Ra'di, Diego Farfan +1
Antenna technology is at the basis of ubiquitous wireless communication systems and sensors. Radiation is typically sustained by conduction currents flowing around resonant metalli…
Reciprocity of thermal diffusion in time-modulated systems
Jiaxin Li, Ying Li, Pei-Chao Cao +6
The reciprocity principle governs the symmetry in transmission of electromagnetic and acoustic waves, as well as the diffusion of heat between two points in space, with important c…
Experimental Observation of Efficient Nonreciprocal Mode Transitions via Spatiotemporally-Modulated Acoustic Metamaterials
Zhaoxian Chen, Yugui Peng, Haoxiang Li +7
In lossless acoustic systems, mode transitions are always time-reversible, consistent with Lorentz reciprocity, giving rise to symmetric sound manipulation in space-time. To overco…
Boundary-Induced Embedded Eigenstate in a Single Resonator for Advanced Sensing
Rasmus E. Jacobsen, Alex Krasnok, Samel Arslanagic +2
Electromagnetic embedded eigenstates, also known as bound states in the continuum (BICs), hold a great potential for applications in sensing, lasing, enhanced nonlinearities and en…
Phase-Induced Frequency Conversion and Doppler Effect with Time-Modulated Metasurfaces
Davide Ramaccia, Dimitrios L. Sounas, Andrea Alu' +2
Metasurfaces consisting of electrically thin and densely packed planar arrays of subwavelength elements enable an unprecedented control of the impinging electromagnetic fields. Spa…
Glide-Symmetric Acoustic Waveguides for Extreme Sensing and Isolation
Nikolina Janković, Andrea Alù
Glide symmetry offers new degrees of freedom to engineer the properties of periodic structures, and thus it has been exploited in various electromagnetic structures. However, so fa…
Atomic-Scale Defect Detection by Nonlinear Light Scattering and Localization
Farbod Shafiei, Tommaso Orzali, Alexey Vert +6
Hetero-epitaxial crystalline films underlie many electronic and optical technologies but are prone to forming defects at their hetero-interfaces. Atomic-scale defects such as threa…
Wood Anomalies and Surface-Wave Excitation with a Time-Grating
Emanuele Galiffi, Yao-Ting Wang, Zhen Lim +3
In order to confine waves beyond the diffraction limit, advances in fabrication techniques have enabled subwavelength structuring of matter, achieving near-field control of light a…
Theory and Design of Multifunctional Space-Time Metasurfaces
Xuchen Wang, Ana Diaz-Rubio, Huanan Li +2
Integrating multiple functionalities into a single metasurface is becoming of great interest for future intelligent communication systems. While such devices have been extensively…
Photonic Higher-Order Topological States Induced by Long Range Interactions
Mengyao Li, Dmitry Zhirihin, Dmitry Filonov +4
The discovery of topological phases has recently led to a paradigm shift in condensed matter physics, and facilitated breakthroughs in engineered photonics and acoustic metamateria…
Highly-Linear Magnet-Free Microelectromechanical Circulators
Yao Yu, Giuseppe Michetti, Ahmed Kord +6
This paper reports the first demonstration of a magnet-free, high performance microelectromechanical system (MEMS) based circulator. An innovative circuit based on the commutation…
Demonstration of a 3rd order hierarchy of higher order topological states in a three-dimensional acoustic metamaterial
Matthew Weiner, Xiang Ni, Mengyao Li +2
In the past years classical wave-systems have constituted an excellent platform for emulating complex quantum phenomena. This approach has been especially fruitful in demonstrating…
Non-Reciprocal Willis Coupling in Zero-Index Moving Media
Li Quan, Dimitrios L. Sounas, Andrea Alu
Mechanical motion can break the symmetry in which sound travels in a medium, but significant non-reciprocity is typically achieved only for very large motion speeds. Here we combin…
Willis metamaterial on a structured beam
Yongquan Liu, Zixian Liang, Jian Zhu +5
Bianisotropy is common in electromagnetics whenever a cross-coupling between electric and magnetic responses exists. However, the analogous concept for elastic waves in solids, ter…
Maximum Willis Coupling in Acoustic Scatterers
Li Quan, Younes Ra'di, Dimitrios Sounas +1
Willis coupling in acoustic materials defines the cross-coupling between strain and velocity, analogous to bianisotropic phenomena in electromagnetics. While these effects have bee…
Coherently Enhanced Wireless Power Transfer
Alex Krasnok, Denis G. Baranov, Andrey Generalov +2
Extraction of electromagnetic energy by an antenna from impinging external radiation is at the basis of wireless communications and power transfer (WPT). The maximum of transferred…
Meta-Gratings: Beyond the Limits of Graded Metasurfaces for Wavefront Control
Younes Ra'di, Dimitrios L. Sounas, Andrea Alu
Graded metasurfaces exploit the local momentum imparted by an impedance gradient to transform the impinging wavefront. This approach suffers from fundamental limits on the overall…