Absorption-free modulation of electron-interference currents by optical fields using intersubband virtual transitions

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Abstract
We propose to modulate quantum-interference currents in a semiconductor electron interferometer by optical fields using intersubband virtual transitions, in which the optical fields are subject to no absorptions despite a high modulation efficiency. The electron-light interaction is more direct and efficient than those of previous proposals, and moreover, extra transitions, which could cause absorptions and/or destroy the electron coherence, are almost perfectly suppressed.