Optical Spin Initialization and Non-Destructive Measurement in a Quantum Dot Molecule

Abstract

The spin of an electron in a self-assembled InAs/GaAs quantum dot molecule is optically prepared and measured through the trion triplet states. A longitudinal magnetic field is used to tune two of the trion states into resonance, forming a superposition state through asymmetric spin exchange. As a result, spin-flip Raman transitions can be used for optical spin initialization, while separate trion states enable cycling transitions for non-destructive measurement. With two-laser transmission spectroscopy we demonstrate both operations simultaneously, something not previously accomplished in a single quantum dot.

Accepted for publication in Phys. Rev. Lett

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Cited by in corpus (28)

• Optical control of one and two hole spins in interacting quantum dots
• Demonstration of quantum entanglement between a single electron spin confined to an InAs quantum dot and a photon
• Optically controlled phase gate and teleportation of a controlled-NOT gate for spin qubits in quantum dot-microcavity coupled system
• Quantum-dot-spin single-photon interface
• Fast spin rotations by optically controlled geometric phases in a quantum dot
• Direct Measurement of Quantum Dot Spin Dynamics using Time-Resolved Resonance Fluorescence
• Hole Spin Mixing in InAs Quantum Dot Molecules
• Carrier thermal escape in families of InAs/InP self-assembled quantum dots
• Deterministic CNOT gate and entanglement swapping for photonic qubits using a quantum-dot spin in a double-sided optical microcavity
• Magnetic anisotropy of singly Mn-doped InAs/GaAs quantum dots
• Optical pumping and non-destructive readout of a single magnetic impurity spin in an InAs/GaAs quantum dot
• Spin Inertia of Resident and Photoexcited Carriers in Singly-Charged Quantum Dots
• On the indistinguishability of Raman photons
• Fast high fidelity hole spin initialization in a single InGaAs quantum dot
• Coherent control of indirect excitonic qubits in optically driven quantum dot molecules
• All optical quantum control of a spin-quantum state and ultrafast transduction into an electric current
• Charge control in laterally coupled double quantum dots
• Persistent narrowing of nuclear-spin fluctuations in InAs quantum dots using laser excitation
• High-fidelity initialization of long-lived quantum dot hole spin qubits by reduced fine-structure splitting
• Exchange interaction and tunneling induced transparency in coupled quantum dots
• All-optical controlled phase gate in quantum dot molecules
• Optically controlled phase gate for two spin qubits in coupled quantum dots
• Frequency-encoded linear cluster states with coherent Raman photons
• Optical rotation of heavy hole spins by non-Abelian geometrical means
• Optically Loaded Semiconductor Quantum Memory Register
• Electrical control of a laterally ordered InAs/InP quantum dash array
• Rapid creation of distant entanglement by multiphoton resonant fluorescence
• Coherence limitations in the optical control of the singlet-triplet qubit in a quantum dot molecule