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We demonstrate that the spin-polarized electron current can interact with amicrowave electric field in a resonant manner. The spin-orbit interaction givesrise to an effective magnetic field proportional to the electric current. Inthe presence of both dc and ac electric field components, electron spinresonance occurs if the ac frequency matches with the spin precession frequencythat is controlled by the dc field. In a device consisting of twospin-polarized contacts connected by a two-dimensional channel, this mechanismallows electrically tuned detection of the ac signal frequency and amplitude.For GaAs, such detection is effective in the frequency domain around tens ofgigahertz.Comment: 10 pages, 2 figure

Resonance-like electrical control of electron spin for microwave measurement