Original Publication Date
Applied Physics Letters
DOI of Original Publication
Date of Submission
There is significant current interest in spintronic devices fashioned after a spin analog of the electro-opticmodulator proposed by Datta and Das [Appl. Phys. Lett.56, 665 (1990)]. In their modulator, the “modulation” of the spin-polarized current is carried out by tuning the Rashba spin-orbit interaction with a gate voltage. Here, we propose an analogous modulator where the modulation is carried out by tuning the Dresselhaus spin-orbit interaction instead, using a split gate. Additionally, the magnetization of the source and drain contacts in our device is transverseto the channel, whereas in the Datta-Dasdevice, it is along the channel. Therefore, in the present modulator, there is no magnetic field in the channel unlike in the case of the Datta-Dasmodulator. This can considerably enhance modulator performance.
Bandyopadhyay, S., Cahay, M. Alternate spintronic analog of the electro-optic modulator. Applied Physics Letters, 85, 1814 (2004). Copyright © 2004 AIP Publishing LLC.
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VCU Electrical and Computer Engineering Publications