Acoustic diode
An acoustic diode includes a phononic crystal medium, a nonlinear acoustic medium, a aluminum tubes contain the phononic crystal medium and the nonlinear acoustic medium. The phononic crystal medium is fabricated by alternately laminating a water layers and a glass layers in a periodic manner.
1. An acoustic diode comprising:
a phononic crystal medium;
a nonlinear acoustic medium;
a aluminum tubes containing the phononic crystal medium and a nonlinear acoustic medium;
the phononic crystal medium being fabricated by alternately laminating a water layers and a glass layers in a periodic manner.
2. The acoustic diode as described in claim 1 , wherein the nonlinear acoustic medium defines a layer of ultrasound contrast agent microbubble suspension.
3. The acoustic diode as described in claim 1 , wherein the phononic crystal medium is fabricated by alternately laminating six water layers and six glass layers in a periodic manner.
4. The acoustic diode as described in claim 1 , wherein the thickness of the glass layers is 1.4 mm, and the thickness of the water layers is 1.2 mm.
5. The acoustic diode as described in claim 1 , wherein the radii of the glass layers and the tube's inner radius are both 50 mm.
6. The acoustic diode as described in claim 2 , wherein the ultrasound contrast agent microbubble suspension diluted using phosphate buffered saline, and sealed with polyethylene films in a 30-mm-long aluminum tube.