Steps in optical absorption spectra due to transitions to different subbands have been observed in HgCdTe‐based nonrectangular superlattices. The sawtooth‐shaped superlattice band gap shows much less thermal degradation than the conventional rectangular superlattice. The improved thermal stability can be attributed to the enhanced quantization effect in which the dependence of superlattice band gap on quantum well size is less sensitive for a sawtooth quantum well than for a rectangular quantum well.
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© 1988 American Institute of Physics.
1988
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