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The longitudinal acoustic velocity for 1 GHz waves propagating along the 100 direction in p++ porous silicon layers has been measured using an acoustic wave transmission technique. The velocities obtained are significantly higher than those previously observed for p+ samples. The porosity dependence is measured to be V-L = 8.43 (1 - P)0.58 km/s, where V-L is longitudinal velocity and P is porosity. The low value of the exponent (0.58) is an indication of a relatively well-ordered pore structure.
|Number of pages||5|
|Journal||Physica Status Solidi (C)|
|Publication status||Published - Jul 2009|
|Event||6th International Conference on Porous Semiconductors Science and Technology - Mallorca, Spain|
Duration: 10 Mar 2008 → 14 Mar 2008
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- 1 Finished
5/09/05 → 4/02/10
Project: Research council