Effect of photocarriers on acoustic wave propagation for measuring excess carrier density and lifetimes in silicon
- 1 December 1984
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 45 (11) , 1181-1183
- https://doi.org/10.1063/1.95084
Abstract
A new technique is described to measure temporal periodic fluctuations in the free-carrier density of silicon. It is based on the electronic dependence of the elastic constants, and involves the measurement of the perturbation in phase of an acoustic wave propagating through a region of modulated carrier density. An experiment is described in which the bulk lifetime of photogenerated carriers is determined using this technique. A theory is developed to predict the acoustic phase perturbation, and is found to agree well with experiment.Keywords
This publication has 9 references indexed in Scilit:
- Measurement of periodic surface heating using surface acoustic wavesApplied Physics Letters, 1983
- Device Implications of the Electronic Effect in the Elastic Constants of SiliconIEEE Transactions on Sonics and Ultrasonics, 1982
- The application of reciprocity theory to scattering of acoustic waves by flawsJournal of Applied Physics, 1978
- Effect of free carriers on the elastic constants of-type silicon and germaniumPhysical Review B, 1976
- Electronic Effects in the Elastic Constants of-Type SiliconPhysical Review B, 1967
- Heat Capacity and Structure of Vitreous Silica and Diamond‐Like Lattices (I)Physica Status Solidi (b), 1967
- Ultrasonic Wave Propagation in Doped-Germanium and-SiliconPhysical Review B, 1964
- Effect of Doping on the Elastic Constants of SiliconPhysical Review B, 1963
- ELECTRONIC EFFECT IN THE ELASTIC CONSTANT C′ OF SILICONApplied Physics Letters, 1963