Abstract
The electron focusing spectrum (EFS) is studied by solving the Schrodinger equation of electrons in an electron focusing geometry. The boundary element method (BEM) has been employed to solve the equation. The magnetic field dependence of the transmission probability from the emitter to the collector is computed and discussed, since it is considered to be proportional to EFS. It is found that the substructure of EFS is attributed to the diffraction of higher mode components in the incident wave. A modified billiard model is also proposed, in which quantization of electron waves in the emitter is included. It is confirmed that the model is useful and sufficient to study EFS.
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