Observation of quantum-size effects in optical transmission spectra of PbTe/Pb1−xEuxTe superlattices
- 17 August 1987
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 51 (7) , 478-480
- https://doi.org/10.1063/1.98372
Abstract
Optical transmission spectra of PbTe/Pb1−xEuxTe (x=0.05) superlattices were measured at 300 K. The superlattices were prepared on thick Pb1−xEuxTe buffers grown on KCl (100) substrates using the hot wall epitaxy technique. Clear steplike absorptions corresponding to the interband electron transitions between subbands (n=1,2,3 to n=1,2,3) were observed for the first time for the PbTe/Pb1−xEuxTe superlattice. The experimental absorption edges agreed very well with theoretical ones calculated assuming the conduction‐band offset is equal to that of the valence band.Keywords
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