Phonon lifetimes in silicon from 50 GHz to 15 THz - University of ...
Phonon lifetimes in silicon from 50 GHz to 15 THz - University of ...
Phonon lifetimes in silicon from 50 GHz to 15 THz - University of ...
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Broadband acoustic pulses<br />
• Fourier transforms <strong>of</strong> echoes <strong>from</strong> 10 nm (100 <strong>GHz</strong>)<br />
and 20 nm (<strong>50</strong> <strong>GHz</strong>) Al films<br />
Fourie er Transfo orm Amp plitude<br />
2.5<br />
1 Round Trip 1 Round Trip<br />
20 2.0<br />
'<strong>50</strong> <strong>GHz</strong>' '100 <strong>GHz</strong>'<br />
1.5<br />
05 0.5<br />
2 Round Trips<br />
'<strong>50</strong> <strong>GHz</strong>'<br />
1.0 2 Round Trips<br />
'100 <strong>GHz</strong>'<br />
0.0<br />
0.0 0.1 0.2 0.3<br />
Frequency (<strong>THz</strong>)
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