Abstract
In this letter we present the experimental evidence of intersubband absorption in the conduction band of compressively strained germanium quantum wells bounded by Ge-rich SiGe barriers. The measured absorption energies are in the terahertz range and are interpreted by means of tight binding calculations which include self-consistent band-bending and depolarization effects. From the comparison of experimental and numerical results a conduction band offset along the L line of about 120 meV has been estimated for the studied heterostructures.
Original language | English |
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Article number | 051918 |
Journal | Applied Physics Letters |
Volume | 95 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2009 |
Externally published | Yes |