TY - JOUR
T1 - Characterization of surface acoustic waves by stroboscopic white-light interferometry
AU - Kokkonen, Kimmo
AU - Lipiäinen, Lauri
AU - Shavrin, Igor
AU - Novotny, Steffen
AU - Kaivola, Matti
AU - Ludvigsen, Hanne
PY - 2015
Y1 - 2015
N2 - We present phase-sensitive absolute amplitude measurements of surface acoustic wave fields obtained using a stroboscopic white-light interferometer. The data analysis makes use of the high resolution available in the measured interferometric phase data, enabling the characterization of the out-of-plane surface vibration fields in electrically excited microstructures with better than 100 pm amplitude resolution. The setup uses a supercontinuum light source with tailored spectral properties for obtaining the high amplitude resolution. The duration of the light pulses is less than 300 ps to allow the detection of high frequencies. These capabilities enabled a detailed measurement of the focusing of surface acoustic waves by an annular interdigital transducer structure operating at 74 MHz, featuring a maximum vibration amplitude of 3 nm.
AB - We present phase-sensitive absolute amplitude measurements of surface acoustic wave fields obtained using a stroboscopic white-light interferometer. The data analysis makes use of the high resolution available in the measured interferometric phase data, enabling the characterization of the out-of-plane surface vibration fields in electrically excited microstructures with better than 100 pm amplitude resolution. The setup uses a supercontinuum light source with tailored spectral properties for obtaining the high amplitude resolution. The duration of the light pulses is less than 300 ps to allow the detection of high frequencies. These capabilities enabled a detailed measurement of the focusing of surface acoustic waves by an annular interdigital transducer structure operating at 74 MHz, featuring a maximum vibration amplitude of 3 nm.
KW - fiber optics amplifiers
KW - interference microscopy
KW - interferometric imaging
KW - supercontinuum generation
KW - surface waves
KW - fiber optics amplifiers
KW - interference microscopy
KW - interferometric imaging
KW - supercontinuum generation
KW - surface waves
KW - fiber optics amplifiers
KW - interference microscopy
KW - interferometric imaging
KW - supercontinuum generation
KW - surface waves
UR - http://dx.doi.org/10.1364/OE.23.009690
U2 - 10.1364/OE.23.009690
DO - 10.1364/OE.23.009690
M3 - Article
SN - 1094-4087
VL - 23
SP - 9690
EP - 9695
JO - Optics Express
JF - Optics Express
IS - 8
ER -