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Intersubband Absorption in Modulation-Doped p-Type $Si/Si_{1-x}Ge_{x}$ Quantum Wells: A Systematic Study
| Content Provider | Scilit |
|---|---|
| Author | Fromherz, Thomas Koppensteiner, Ewald Helm, Manfred Bauer, Günther Nützel, Joachim Abstreiter, Gerhard |
| Copyright Year | 1994 |
| Description | Journal: Japanese Journal of Applied Physics A study of intersubband infrared (IR) absorption in modulation-doped p-type Si/SiGe quantum wells is presented for SiGe wells with widths between 26 Å and 36 Å and Ge contents in the range from 19% to 50%. Absorption lines between 725 $cm^{-1}$ and 1830 $cm^{-1}$ are observed. Depending on the barrier height (i.e., on the Ge content of the wells), the heavy-hole subbands excited by the IR radiation are either localized in the wells or strongly mixed with barrier-bound states and therefore delocalized. The shape of the absorption line correspondingly changes from a narrow Lorentz line to a rather broad absorption band. Using the structural parameters determined by high-resolution triple-axis X-ray diffraction, the results of a self-consistent calculation are in excellent agreement with the measured absorption spectra. |
| Related Links | http://iopscience.iop.org/article/10.1143/JJAP.33.2361/pdf |
| ISSN | 00214922 |
| e-ISSN | 13474065 |
| DOI | 10.1143/jjap.33.2361 |
| Journal | Japanese Journal of Applied Physics |
| Issue Number | 4S |
| Volume Number | 33 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1994-04-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Japanese Journal of Applied Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy Engineering |
