Directed electron transport through ballistic quantum dot under microwave radiation

Abstract

Rectification of microwave radiation by asymmetric, ballistic quantum dot is observed. The directed transport is studied at different frequency (1-40 GHz) temperatures (0.3K-6K)and magnetic field. Dramatic reduction of the rectification is found in magnetic fields at which the cyclotron (Larmor) radius of the electron orbits at Fermi level is smaller than the size of the quantum dot. It strongly suggests the ballistic nature of the observed nonlinear phenomena. Both symmetric and anti-symmetric with respect to the magnetic field contributions to the directed transport are presented. We have found that the behavior of the symmetric part of the rectified voltage with the magnetic field is different significantly for microwaves with different frequencies. A ballistic model of the directed transport is proposed.

5 pages, 3 figures

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Cited by in corpus (6)

• Experimental investigation of the ratchet effect in a two-dimensional electron system with broken spatial inversion symmetry
• Nonlinear resistance of 2D electrons in crossed electric and magnetic fields
• Rectification and nonlinear transport in chaotic dots and rings
• Rectification in mesoscopic AC-gated semiconductor devices
• Fast optical control of a coded qubit in a triple quantum dot
• Rectified voltage induced by a microwave field in a confined two-dimensional electron gas with a mesoscopic static vortex