TY - GEN

T1 - Access to long-term optical memories using photon echoes retrieved from electron spins in semiconductor quantum wells

AU - Poltavtsev, S.V.

AU - Langer, L.

AU - Yugova, I.A.

AU - Salewski, M.

AU - Kapitonov, Yu.V.

AU - Yakovlev, D.R.

AU - Karczewski, G.

AU - Wojtowicz, T.

AU - Akimov, I.A.

AU - Bayer, M.

PY - 2016

Y1 - 2016

N2 - We use spontaneous (two-pulse) and stimulated (three-pulse) photon echoes for studying the coherent evolution of optically excited ensemble of trions which are localized in semiconductor CdTe/CdMgTe quantum well. Application of transverse magnetic field leads to the Larmor precession of the resident electron spins, which shuffles optically induced polarization between optically accessible and inaccessible states. This results in several spectacular phenomena. First, magnetic field induces oscillations of spontaneous photon echo amplitude. Second, in three-pulse excitation scheme, the photon echo decay is extended by several orders of magnitude. In this study, short-lived optical excitation which is created by the first pulse is coherently transferred into a long-lived electron spin state using the second optical pulse. This coherent spin state of electron ensemble persists much longer than any optical excitation in the system, preserving information on initial optical field, which can be retrieved as a photon

AB - We use spontaneous (two-pulse) and stimulated (three-pulse) photon echoes for studying the coherent evolution of optically excited ensemble of trions which are localized in semiconductor CdTe/CdMgTe quantum well. Application of transverse magnetic field leads to the Larmor precession of the resident electron spins, which shuffles optically induced polarization between optically accessible and inaccessible states. This results in several spectacular phenomena. First, magnetic field induces oscillations of spontaneous photon echo amplitude. Second, in three-pulse excitation scheme, the photon echo decay is extended by several orders of magnitude. In this study, short-lived optical excitation which is created by the first pulse is coherently transferred into a long-lived electron spin state using the second optical pulse. This coherent spin state of electron ensemble persists much longer than any optical excitation in the system, preserving information on initial optical field, which can be retrieved as a photon

KW - Photon echo

KW - magnetic-field-induced photon echo

KW - Rabi oscillations

KW - four-wave-mixing

KW - quantum wells

U2 - 10.1117/12.2237360

DO - 10.1117/12.2237360

M3 - Conference contribution

SP - 99311V

BT - SPIE NANOSCIENCE + ENGINEERING | 28 AUGUST - 1 SEPTEMBER 2016 Spintronics IX

T2 - SPIE NANOSCIENCE + ENGINEERING | 28 AUGUST - 1 SEPTEMBER 2016<br/>

Y2 - 28 August 2016 through 1 September 2016

ER -