Focusing an ultrasonic surface or bulk wave to a point can maximize the amount of ultrasonic energy at a point and increase the sensitivity of a measurement. Using a noncontact, ultrasonic method we focus an ultrasonic bulk wave pulse in a sample, using the surface profile of the sample itself to focus the wave. Experiments and modeling confirm that the wave pulse undergoes a phase shift on passing through the focal point.
REFERENCES
1.
2.
I.
Tolstoy
, J. Acoust. Soc. Am.
44
, 675
(1968
).3.
4.
P.
Cielo
and C. K.
Jen
, IEEE Trans. Ultrason. Ferroelectr. Freq. Control
34
, 396
(1987
).5.
C. K.
Jen
, P.
Cielo
, J.
Bussiere
, F.
Nadeau
, and G. W.
Farnell
, Appl. Phys. Lett.
46
, 241
(1985
).6.
N. C. R.
Holme
, B. C.
Daly
, M. T.
Myaing
, and T. B.
Norris
, Appl. Phys. Lett.
83
, 392
(2003
).7.
A. A.
Kolomenskii
, S. N.
Jerebtsov
, and H. A.
Schuessler
, Opt. Lett.
30
, 2019
(2005
).8.
9.
10.
S.
Dixon
, M.
Fletcher
, and G.
Rowlands
, J. Appl. Phys.
104
, 114901
(2008
).© 2010 American Institute of Physics.
2010
American Institute of Physics
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