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Acoustic waveguiding in a silicon carbide phononic crystals at microwave frequencies

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5016380· OSTI ID:1476935
 [1];  [2];  [2];  [2];  [3]
  1. Univ. of Jamestown, Jamestown, ND (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Kansas State Univ., Manhattan, KS (United States)

Two dimensional SiC–air phononic crystals have been modeled, fabricated, and tested with a measured bandgap ranging from 665 to 693 MHz. Snowflake air inclusions on a hexagonal lattice were used for the phononic crystal. By manipulating the phononic crystal lattice and inserting circular inclusions, a waveguide was created at 680 MHz. The combined insertion loss and propagation loss for the waveguide is 8.2 dB, i.e., 39% of the energy is guided due to the high level of the confinement afforded by the phononic crystal. In conclusion, the SiC–air phononic crystals and waveguides were fabricated using a CMOS-compatible process, which allows for seamless integration of these devices into wireless communication systems operating at microwave frequencies.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1476935
Report Number(s):
SAND--2018-10596J; 668175
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 112; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Phononic topological insulators based on six-petal holey silicon structures journal February 2019
On-chip valley topological materials for elastic wave manipulation journal October 2018
Experimental and numerical evidence of comparable levels of attenuation in periodic and a-periodic metastructures journal July 2019
Spatial distribution of the phononic crystal modes excited by a moving laser source journal December 2019
Propagation and Imaging of Mechanical Waves in a Highly Stressed Single-Mode Acoustic Waveguide journal June 2019

Figures / Tables (6)


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