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Quantum Transport and Photon-Assisted Andreev Reflection in Superconductor–Semiconductor Interface

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Abstract:

We have investigated the quantum transport through the Superconductor–Semiconductor mesoscopic interface in the presence of an external radiation field. The current spectrum is analyzed as a function of the frequency and the temperature. The current–voltage (I–V) characteristics were found to be very sensitive to the photon frequency. Additionally, photon-assisted transport in our system is very robust: The one-photon channel remains up to lowtemperature, which implies that these structures support gain at THz frequencies even at 9 K. The resonances sit on a background current which it is deeply modified, as a result of photon assisted multiple Andreev reflections. The results render rigid support for the full quantum theory of transport between two superconductors based on the idea of Andreev bound states.

Keywords: ANDREEV REFLECTION; ELECTRON TRANSPORT; I–V CHARACTERISTICS; PHOTON-ASSISTED

Document Type: Research Article

DOI: https://doi.org/10.1166/jctn.2008.1113

Publication date: 2008-11-01

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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