Original Publication Date
Applied Physics Letters
DOI of Original Publication
Date of Submission
We show that the dominant absorption peak due to intersubband transition in a gated quantum wire will split into a main peak and two satellite peaks if both Rashba and Dresselhaus spin-orbit interactions are present. One satellite peak will be redshifted, and the other blueshifted. From the relative intensity of either satellite peak, and the magnitude of the red- or blueshift, we can determine both Rashba and Dresselhaus interaction strengths separately, if we also carry out a Hall measurement to determine the carrier concentration and a quantized conductance step measurement to determine the energy separation between subbands. This method may be a convenient alternative to usual magnetotransport measurements used to measurespin-orbit interaction strengths. It is also more powerful because it allows us to measure the strengths of the two types of interactions separately.
Bandyopadhyay, S., Sarkar, S. Infrared absorption in a quantum wire: A technique to measure different types of spin-orbit interaction strengths. Applied Physics Letters, 88, 183108 (2006). Copyright © 2006 AIP Publishing LLC.
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VCU Electrical and Computer Engineering Publications