Multi-functional resonant acoustic wave router

Richoux, Olivier; Achilleos, V.; Theocharis, G.; Brouzos, Ioannis; Diakonos, F. K.

doi:10.1088/1361-6463/ab78d9

Cited by 7 publications

(4 citation statements)

References 29 publications

(44 reference statements)

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“…Meanwhile, subwavelength resonant acoustic structures were used to perform wave routing functionalities that were controlled by an adapted input wavefront (40)(41)(42), following the above-mentioned idea of "controlling light with light" (11)(12)(13)(14)(15). These works differ from ours chiefly in that the input wavefront rather than the scattering system determines the wave routing functionality, relegating the functionality control to wave sources that must offer multichannel coherent control.…”

Section: Signal Routing In Nanophotonics and Acousticsmentioning

confidence: 99%

Reflectionless programmable signal routers

et al. 2023

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We demonstrate experimentally that reflectionless scattering modes (RSMs), a generalized version of coherent perfect absorption, can be functionalized to perform reflectionless programmable signal routing. We achieve versatile programmability both in terms of operating frequencies and routing functionality with negligible reflection upon in-coupling, which avoids unwanted signal power echoes in radio frequency or photonic networks. We report in situ observations of routing functionalities like wavelength demultiplexing, including cases where multichannel excitation requires adapted coherent input wavefronts. All experiments are performed in the microwave domain based on the same irregularly shaped cavity with strong modal overlap that is massively parametrized by a 304–element-programmable metasurface. RSMs in our highly overdamped multiresonance transport problem are fundamentally intriguing because the simple critical coupling picture for reflectionless excitation of isolated resonances fails spectacularly. We show in simulation that the distribution of damping rates of scattering singularities broadens under strong absorption so that weakly damped zeros can be tuned toward functionalized RSMs.

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Section: Signal Routing In Nanophotonics and Acousticsmentioning

confidence: 99%

Reflectionless programmable signal routers

et al. 2023

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“…22 Among them, the four-port diffraction gratings are widely used in many fields due to their good diffraction efficiency and flexibility. [23][24][25][26][27][28] Therefore, it is necessary to propose a four-port beam splitter with high diffraction efficiency. In recent years, some works have reported that performance can be improved through novel grating structures.…”

Section: Introductionmentioning

confidence: 99%

Structure and characterization of plus-shaped configuration for 1 × 4 splitter

Liang,

Wang

2023

Opt. Eng.

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A polarization-insensitive four-port beam splitter based on the plus-shaped ridge structure is introduced. The ridge of this grating is a plus-shaped resin material. Based on the rigorous coupled-wave analysis and the simulated annealing algorithm, the transmission efficiency of the zeroth order under TE polarization is 1.79%, and the efficiencies of 22.21%/22.19% for the ± first/± second orders are diffracted. Meanwhile, the transmission efficiency of the zeroth order under TM polarization is 0.13%, and the efficiencies of 23.25%/23.23% for the ± first/± second orders are diffracted. In addition, the diffraction efficiency of each order is computed while the wavelength, grating period, and duty cycle are varied around the optimized parameters. The study reveals that the grating has excellent tolerance and stability. Hence, it is inferred that plus-shaped ridge four-port grating exhibits promising potential for advancement in the field of lasers.

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“…Ramezani et al proposed parity-time-symmetric impedance matched media without breaking reciprocity [20]. Richoux et al demonstrated the splitter and combined function by waveguides loaded with Helmholtz resonators [21,22]. Mouadili et al theoretically proposed an acoustic demultiplexer with slender tubes based on Fano induced transparency resonances [23].…”

Section: Introductionmentioning

confidence: 99%

Induced transparency based subwavelength acoustic demultiplexers

Gu¹,

Cheng²,

Wen³

et al. 2021

J. Phys. D: Appl. Phys.

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Wave demultiplexers transporting desired wavelengths towards proper directions or ports are attracting numerous interests and applications in both physical and engineering areas. In acoustics, there is still a lack of compact and simple designs to achieve demultiplexers in three-port systems. In this work, we propose such a design using Helmholtz resonators where the frequency selection is based on the phenomenon of acoustically induced transparency (AIT). First, a modified transfer matrix method is derived to analytically describe and analyze the AIT effect with Helmholtz resonators. Then, the good performances of wave routing in these designs are further demonstrated by both simulation and experiment. These AIT based demultiplexers are subwavelength and simple in their designs. Therefore, they are promising for various potential applications such as signal processing, information communication and sensing.

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Multi-functional resonant acoustic wave router

Cited by 7 publications

References 29 publications

Reflectionless programmable signal routers

Reflectionless programmable signal routers

Structure and characterization of plus-shaped configuration for 1 × 4 splitter

Induced transparency based subwavelength acoustic demultiplexers

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