Abstract
We numerically demonstrate a non-reciprocal acoustic waveguide by utilizing the indirect interband transition between two guided modes. The waveguide, consisting of a water core sandwiched between parallel steel plates, is designed to support symmetric and asymmetric guided modes with different frequencies and wavevectors. Dynamic mode conversion is then achieved by applying spatio-temporal density modulation in the core of the waveguide to induce both frequency and wavevector shifts of the incident guided wave. Numerical simulations prove that the phase matching condition is satisfied only for the forward propagation, not for the backward one, thus realizing the non-reciprocal acoustic waveguide. Our approach based on a linear dynamic system may achieve wide-band tunable operation with a low-energy consumption, paving the way toward the sophisticated acoustic diode applications.
| Original language | English |
|---|---|
| Article number | 07JB01 |
| Journal | Japanese Journal of Applied Physics |
| Volume | 56 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 1 2017 |
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ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)
Cite this
Design of non-reciprocal acoustic waveguides by indirect interband transitions. / Ishikawa, Atsushi; Tsuruta, Kenji.
In: Japanese Journal of Applied Physics, Vol. 56, No. 7, 07JB01, 01.07.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Design of non-reciprocal acoustic waveguides by indirect interband transitions
AU - Ishikawa, Atsushi
AU - Tsuruta, Kenji
PY - 2017/7/1
Y1 - 2017/7/1
N2 - We numerically demonstrate a non-reciprocal acoustic waveguide by utilizing the indirect interband transition between two guided modes. The waveguide, consisting of a water core sandwiched between parallel steel plates, is designed to support symmetric and asymmetric guided modes with different frequencies and wavevectors. Dynamic mode conversion is then achieved by applying spatio-temporal density modulation in the core of the waveguide to induce both frequency and wavevector shifts of the incident guided wave. Numerical simulations prove that the phase matching condition is satisfied only for the forward propagation, not for the backward one, thus realizing the non-reciprocal acoustic waveguide. Our approach based on a linear dynamic system may achieve wide-band tunable operation with a low-energy consumption, paving the way toward the sophisticated acoustic diode applications.
AB - We numerically demonstrate a non-reciprocal acoustic waveguide by utilizing the indirect interband transition between two guided modes. The waveguide, consisting of a water core sandwiched between parallel steel plates, is designed to support symmetric and asymmetric guided modes with different frequencies and wavevectors. Dynamic mode conversion is then achieved by applying spatio-temporal density modulation in the core of the waveguide to induce both frequency and wavevector shifts of the incident guided wave. Numerical simulations prove that the phase matching condition is satisfied only for the forward propagation, not for the backward one, thus realizing the non-reciprocal acoustic waveguide. Our approach based on a linear dynamic system may achieve wide-band tunable operation with a low-energy consumption, paving the way toward the sophisticated acoustic diode applications.
UR - http://www.scopus.com/inward/record.url?scp=85025084721&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85025084721&partnerID=8YFLogxK
U2 - 10.7567/JJAP.56.07JB01
DO - 10.7567/JJAP.56.07JB01
M3 - Article
AN - SCOPUS:85025084721
VL - 56
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 7
M1 - 07JB01
ER -