Fast electron spin resonance controlled manipulation of spin injection into quantum dots

Journal Article · Mon Jun 23 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4884016· OSTI ID:22304453

Merz, Andreas; Siller, Jan; Schittny, Robert; Krämmer, Christoph; Kalt, Heinz; Hetterich, Michael ^[1]

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1. Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe (Germany)

In our spin-injection light-emitting diodes, electrons are spin-polarized in a semimagnetic ZnMnSe spin aligner and then injected into InGaAs quantum dots. The resulting electron spin state can be read out by measuring the circular polarization state of the emitted light. Here, we resonantly excite the Mn 3d electron spin system with microwave pulses and perform time-resolved measurements of the spin dynamics. We find that we are able to control the spin polarization of the injected electrons on a microsecond timescale. This electron spin resonance induced spin control could be one of the ingredients required to utilize the quantum dot electrons or the Mn spins as qubits.

• OSTI ID: 22304453
• Journal Information: Applied Physics Letters, Vol. 104, Issue 25; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONTROL
ELECTRON SPIN RESONANCE
EMISSION
GALLIUM ARSENIDES
INDIUM COMPOUNDS
INJECTION
LIGHT EMITTING DIODES
MANGANESE COMPOUNDS
MICROWAVE RADIATION
POLARIZATION
PULSES
QUANTUM DOTS
QUBITS
READOUT SYSTEMS
SELENIUM COMPOUNDS
SPIN ORIENTATION
TIME RESOLUTION
VISIBLE RADIATION
ZINC COMPOUNDS