One-way phonon isolation in acoustic waveguides

@article{Zanjani2014OnewayPI,
  title={One-way phonon isolation in acoustic waveguides},
  author={Mehdi B. Zanjani and Arthur R. Davoyan and Ahmed Mohamed Mahmoud and Nader Engheta and Jennifer R. Lukes},
  journal={Applied Physics Letters},
  year={2014},
  volume={104},
  pages={081905}
}
We present a method to achieve one-way phonon isolation in acoustic waveguides by considering spatio-temporal modulation of material properties. One-way conversion between symmetric and antisymmetric shear horizontal modes of an unbounded plate acoustic waveguide is numerically demonstrated using this method. Analytical and numerical evidence for the possibility of mode conversion is presented. Possible experimental implementation and applications for on-chip signal isolation in MEMS devices… 

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References

SHOWING 1-10 OF 28 REFERENCES

Piezoelectric resonator arrays for tunable acoustic waveguides and metamaterials

One of the outstanding challenges in phononic crystals and acoustic metamaterials development is the ability to tune their performance without requiring structural modifications. We report on the

Asymmetric acoustic gratings

The unidirectional transmission of acoustic waves is realized by a simple geometrically asymmetric steel grating structure. This exotic phenomenon stems from the one-way diffraction effect induced by

Tunable unidirectional sound propagation through a sonic-crystal-based acoustic diode.

TLDR
Different from nonreciprocity due to the nonlinear acoustic effect and broken time reversal symmetry, this new model leads to a one-way effect with higher efficiency, broader bandwidth, and much less power consumption, showing promising applications in various sound devices.

Electrically driven nonreciprocity induced by interband photonic transition on a silicon chip.

TLDR
By achieving an indirect interband photonic transition, it is shown that the transmission coefficients between two single-mode waveguides become dependent on the propagation directions only in the presence of the electrical drive.

Acoustic wave transmission in time-varying phononic crystals

Phononic crystal effects are typically narrowband and highly dependent on the size and spacing of the scatterers within the crystal—properties that are fixed and unchangeable. We propose that it may

Acoustic diode: rectification of acoustic energy flux in one-dimensional systems.

TLDR
A simple one-dimensional model of an acoustic diode formed by coupling a superlattice with a strongly nonlinear medium is numerically demonstrated and the effectiveness of theoustic diode is proved despite its simplicity.

Phononic plate waves

TLDR
A review of recent works related to phononic plate waves and the design and fabrication of a silicon-based Lamb wave resonator which utilizes PC plates as reflective gratings to form the resonant cavity are discussed.

Reduction in the thermal conductivity of single crystalline silicon by phononic crystal patterning.

TLDR
The measured thermal conductivity of a series of single crystalline silicon PnCs is much smaller than that predicted by only accounting for boundary scattering at the interfaces of the PnC lattice, indicating that coherent phononic effects are causing an additional reduction to the cross plane thermal Conductivity.

Complete optical isolation created by indirect interband photonic transitions

Achieving on-chip optical signal isolation is a fundamental difficulty in integrated photonics [1]. The need to overcome this difficulty, moreover, is becoming increasingly urgent, especially with

LiNbO3 acousto-optical and electro-optical micromodulators

We report on acousto-optical (AO) and electro-optical (EO) LiNbO3 modulators with an active length of only 11 µm. The miniature devices are based on photonic crystal (PhC) structures that are