A Charge and Spin Readout Scheme For Single Self-Assembled Quantum Dots

Abstract

We propose an all optical spin initialization and readout concept for single self assembled quantum dots and demonstrate its feasibility. Our approach is based on a gateable single dot photodiode structure that can be switched between charge and readout mode. After optical electron generation and storage, we propose to employ a spin-conditional absorption of a circularly polarized light pulse tuned to the single negatively charged exciton transition to convert the spin information of the resident electron to charge occupancy. Switching the device to the charge readout mode then allows us to probe the charge state of the quantum dot (1e, 2e) using non-resonant luminescence. The spin orientation of the resident electron is then reflected by the photoluminescence yield of doubly and singly charged transitions in the quantum dot. To verify the feasibility of this spin readout concept, we have applied time gated photoluminescence to confirm that selective optical charging and efficient non perturbative measurement of the charge state can be performed on the same dot. The results show that, by switching the electric field in the vicinity of the quantum dot, the charging rate can be switched between a regime of efficient electron generation and a readout regime, where the charge occupancy and, therefore, the spin state of the dot can be tested via PL over millisecond timescales, without altering it.

20 Pages, 6 Figures, submitted to Phys. Rev. B

References in corpus (18)

• Quantum Computation with Quantum Dots
• Spins in few-electron quantum dots
• Single-shot read-out of an individual electron spin in a quantum dot
• Driven coherent oscillations of a single electron spin in a quantum dot
• Coherent control of a single electron spin with electric fields
• Observation of coherent oscillation of a single nuclear spin and realization of a two-qubit conditional quantum gate
• Phonon-induced decay of the electron spin in quantum dots
• Polarization and readout of coupled single spins in diamond
• Observation of Faraday rotation from a single confined spin
• An electrostatically defined serial triple quantum dot charged with few electrons
• Room-temperature manipulation and decoherence of a single spin in diamond
• Fast optical preparation, control and read-out of single quantum dot spin
• Nuclear Spin Switch in Semiconductor Quantum Dots
• Dynamics of Quantum Dot Nuclear Spin Polarization Controlled by a Single Electron
• Coherence of an optically illuminated single nuclear spin qubit
• Spin-selective optical absorption of singly charged excitons in a quantum dot
• Highly efficient single photon emission from single quantum dots within a two-dimensional photonic bandgap
• Single electron-spin memory with a semiconductor quantum dot

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• Amplified Sensitivity of Nitrogen-Vacancy Spins in Nanodiamonds using All-Optical Charge Readout
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• All optical quantum control of a spin-quantum state and ultrafast transduction into an electric current
• Fast high fidelity hole spin initialization in a single InGaAs quantum dot
• Direct observation of metastable hot trions in an individual quantum dot
• High-fidelity initialization of long-lived quantum dot hole spin qubits by reduced fine-structure splitting
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• Selective Optical Charge Generation, Storage and Readout in a Single Self Assembled Quantum Dot
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• Quantum dot molecule devices with optical control of charge status and electronic control of coupling
• Complete state tomography of a quantum dot confined spin qubit
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• Coplanar stripline antenna design for optically detected magnetic resonance on semiconductor quantum dots
• Precise simulation for single-hole spin control in semiconductor quantum dots
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• Resonant two-laser spin-state spectroscopy of a negatively charged quantum dot-microcavity system with a cold permanent magnet
• Dynamics of Charge Leakage From Self-assembled CdTe Quantum Dots