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AIP conference proceedings

Angular momentum transfer between a circularly polarized photon and an electron spin in double quantum dots

T. Asayama, T. Fujita, Haruki Kiyama, A. Oiwa, Seigo Tarucha, Jisoon Ihm, Hyeonsik Cheong

Published Jan 1, 2011• 0 citations
Publisher

Abstract

We propose an experimental scheme of photon‐spin quantum interface using a semiconductor double quantum dot. A polarized electron spin is excited by a circularly polarized photon. We detect the spin state applying Pauli spin blockade which is often employed to detect orientation of a single electron spin in double quantum dots.
DOI
10.1063/1.3666720

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We show storage of the circular polarization of an optical field, transferring it to the spin-state of an individual electron confined in a single semiconductor quantum dot. The state is subsequently read out through the electronically-triggered emission of a single photon. The emitted photon shares the same polarization as the initial pulse but has a different energy, making the transfer of quantum information between different physical systems possible. With an applied magnetic field of 2 T, spin memory is preserved for at least 1000 times more than the exciton's radiative lifetime.