Semiconductor Physics, Quantum Electronics & Optoelectronics, 23 (3), P. 316-322 (2020).

High-coherent oscillations in IR spectra of macroporous silicon with nanocoatings
L.A. Karachevtseva*, O.O. Lytvynenko

O. V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 41, prospect Nauky, 03680 Kyiv, Ukraine Corresponding author phone:+38(044) 525-23-09; e-mail:

Abstract. IR light absorption oscillations in 2D macroporous silicon with CdTe, ZnO and CdS surface nanocrystals, microporous and SiO2 layers were compared taking into account the electro-optical Wannier–Stark effect. We proposed a high-coherent optical quantum computer based on ZnO nanoparticles on macroporous silicon surface with the broadening parameter of the Wannier–Stark steps of 10–3 and the IR oscillation coherence of 0.25–0.4% at room temperature. This value is much less than the coherence of cold atoms (5%) and diamond crystal with the nitrogen impurity (10–17%). A logical qubit of this quantum computer is the presence/absence of the infinite resonance scattering of oscillated electron by the Wannier levels in the electric field at the silicon matrix – nanocoating boundary. The scattering amplitudes are controlled and measured at room temperature by using the resonant maxima of IR absorption.

Keywords:macroporous silicon with nanocoatings, infinite resonance scattering, optical quantum computer.

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