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Virginia Commonwealth University
Electrical and Computer Engineering Publications
2-DIMENSIONAL ELECTRON-GAS; BALLISTIC CONSTRICTIONS; QUANTIZED CONDUCTANCE; MODULATOR; RASHBA; ANALOG; WELLS
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Infrared Absorption In A Quantum Wire: A Technique To Measure Different Types Of Spin-Orbit Interaction Strengths, S. Bandyopadhyay, S. Sarkar
Infrared Absorption In A Quantum Wire: A Technique To Measure Different Types Of Spin-Orbit Interaction Strengths, S. Bandyopadhyay, S. Sarkar
Electrical and Computer Engineering Publications
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 …