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Electron-nuclear spin control in charged semiconductor quantum dots by electrical currents through micro-coils
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10.1063/1.3373591
/content/aip/journal/apl/96/15/10.1063/1.3373591
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/15/10.1063/1.3373591
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Scanning-electron micrograph of a microcoil on top of CdSe/ZnSe QDs. Inner and outer diameter of the coil are and , respectively. (b) Distribution of the longitudinal field component for the microcoil of (a) along a line including the coil center at current calculated from Biot–Savart law for a complete circular loop. (c) PL transient after switching circular polarization orientation of the optical excitation at a current through the microcoil. (d) Amplitude vs field generated by a conventional superconducting magnet (circles) and vs in both current directions (up- and down-triangles), .

Image of FIG. 2.
FIG. 2.

Generation and erasure of the electron spin. Upper panel: schematics of optical excitation polarization degree and current pulse. Optical modulation like in Fig. 1 but a smaller coil ( and ) is used in order to produce larger . Lower panel: PL transients observed.

Image of FIG. 3.
FIG. 3.

Read-out of the nuclear spin state by electrical current pulses. (a) Pulse schematics for obtaining nuclear spin-up orientation (top), no DNP (middle), and down-orientation (bottom), . (b) Electron spin erasure degree as function of the normalized net pumping rate . and are taken under excitation, i.e., the electron spin is oriented downwards. The same coil as in Fig. 2(b) is used.

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/content/aip/journal/apl/96/15/10.1063/1.3373591
2010-04-14
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electron-nuclear spin control in charged semiconductor quantum dots by electrical currents through micro-coils
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/15/10.1063/1.3373591
10.1063/1.3373591
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