Properties of superlattices with semiconducting wells
| Autor: | Brent K. Wagner, Robert Bicknell-Tassius, T.K. Tran, W. Hoerstel, J. W. Tomm, S. D. Pearson, A. Parikh, Peter Schäfer, T. Kelz, Christopher J. Summers |
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| Rok vydání: | 1996 |
| Předmět: |
Photoluminescence
Condensed Matter::Other Chemistry Band gap Superlattice Analytical chemistry Physics::Optics Electron Condensed Matter Physics Molecular physics Inorganic Chemistry Condensed Matter::Materials Science Effective mass (solid-state physics) Materials Chemistry Luminescence Anisotropy Excitation |
| Zdroj: | Journal of Crystal Growth. 159:1080-1084 |
| ISSN: | 0022-0248 |
| DOI: | 10.1016/0022-0248(95)00864-0 |
| Popis: | We present a study of the electro-optical properties of semiconducting Hg 1-x Cd x Te/CdTe (0.28 < x < 0.30) superlattice (SL) structures by photo- and magneto-luminescence in the Voigt and Faraday configurations. The motivation for this study was to determine and assess the influence of coupling between SL wells on the electrical and emission properties of these structures. The energy bandgap of the SLs was observed to depend very strongly on barrier width. Both transport and magneto-luminescence measurements confirmed the anisotropy of the electron effective mass and identified an excitonic contribution to the PL emission. Studies of the PL integrated intensity on excitation intensity showed that excitonic corrections were required to adequately fit the luminescence data. Optical gains of 80 cm -1 were obtained for an excitation intensity of 100 kW/cm 2 indicating that these SLs have the electro-optical properties required for making efficient mid-infrared detectors and laser diodes. |
| Databáze: | OpenAIRE |
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