Shorter wavelength intersubband absorption down to λ = 1.55 µm in (CdS/ZnSe)/BeTe type-II superlattices
✍ Scribed by B. S. Li; R. Akimoto; K. Akita; T. Hasama
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 419 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1862-6351
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✦ Synopsis
Abstract
We first present the dependence of intersubband transition (ISB‐T) on the electronic doping density in (CdS/ZnSe)/BeTe superlattices (SLs). The in situ RHEED and X‐ray diffraction measurements reveal these SLs with perfect structure. An ISB‐T energy as high as 0.787 eV is observed in this structure. The intensity of ISB absorption increases with increasing ZnCl~2~ flux until reaches a maximum and then decreases with further more ZnCl~2~ flux supplying. The ISB‐T energy slightly red shifts from 0.787 to 0.775 eV with ZnCl~2~ flux increasing and then blue shifts to 0.785 eV when the intensity of ISB decreases with more chlorine doping. Finially, The anneal effects on the properties in (CdS/ZnSe)/BeTe as well as CdS/ZnSe structures are studied. The explanations to result in the change in (CdS/ZnSe)/BeTe and CdS/ZnSe structures are given. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)