Semiconductor superlattice electron wave interference filters

The quantitative analogies that have been established between electron wave propagation in semiconductors and optical wave propagation in dielectrics are used to demonstrate that high-resolution energy filters in semiconductors are possible. An example filter consisting of electron quarter-wavelengt...

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Bibliographic Details
Published in:Applied physics letters 1988-11, Vol.53 (21), p.2047-2049
Main Authors: GAYLORD, T. K, BRENNAN, K. F
Format: Article
Language:English
Subjects:
Charged-particle beams
Electromagnetism
electron and ion optics
Electron and positron beams
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
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Summary:The quantitative analogies that have been established between electron wave propagation in semiconductors and optical wave propagation in dielectrics are used to demonstrate that high-resolution energy filters in semiconductors are possible. An example filter consisting of electron quarter-wavelength layers of GaAs and Ga0.55Al0.45As and a half-wavelength layer of GaAs is presented and theoretically analyzed. The pass electron energy is 0.139 eV and the passband is only 0.003 eV (2.2% of pass energy). Such a filter could be incorporated into semiconductor devices (e.g., as a hot-electron emitter in a ballistic transistor) or used to control free-space electron beams (e.g., in electron beam lithography).
ISSN:0003-6951
1077-3118
DOI:10.1063/1.100315