Spin Fine Structure in Optically Excited Quantum Dot Molecules

Abstract

The interaction between spins in coupled quantum dots is revealed in distinct fine structure patterns in the measured optical spectra of InAs/GaAs double quantum dot molecules containing zero, one, or two excess holes. The fine structure is explained well in terms of a uniquely molecular interplay of spin exchange interactions, Pauli exclusion and orbital tunneling. This knowledge is critical for converting quantum dot molecule tunneling into a means of optically coupling not just orbitals, but spins.

10 pages, 7 figures, added material, (published)

References in corpus (8)

• Control and Detection of Singlet-Triplet Mixing in a Random Nuclear Field
• Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
• Engineering electron and hole tunneling with asymmetric InAs quantum dot molecules
• Polarized fine structure in the excitation spectrum of a negatively charged quantum dot
• Electrically tunable g-factors in quantum dot molecular spin states
• Optically Probing Spin and Charge Interactions in an Tunable Artificial Molecule
• Symmetry of anisotropic exchange interactions in semiconductor nanostructures
• Direct observation of acoustic phonon mediated relaxation between coupled exciton states in a single quantum dot molecule

Cited by in corpus (29)

• Ultrafast optical control of entanglement between two quantum dot spins
• Optically generated 2-dimensional photonic cluster state from coupled quantum dots
• Quantum computing by optical control of electron spins
• Scalable qubit architecture based on holes in quantum dot molecules
• Hole Spin Mixing in InAs Quantum Dot Molecules
• Photoluminescence Spectroscopy of the Molecular Biexciton in Vertically Stacked Quantum Dot Pairs
• Strong Electron-Hole Exchange in Coherently Coupled Quantum Dots
• Fine structure and optical pumping of spins in individual semiconductor quantum dots
• Exciton spectra in vertical stacks of triple and quadruple quantum dots in an electric field
• Spectroscopic signatures of many-body interactions and delocalized states in self-assembled lateral quantum dot molecules
• Bright electrically controllable quantum-dot-molecule devices fabricated by in-situ electron-beam lithography
• Transition from Jaynes-Cummings to Autler-Townes ladder in a quantum dot-microcavity system
• All-optical controlled phase gate in quantum dot molecules
• Optically induced spin gates in coupled quantum dots using the electron-hole exchange interaction
• Optically controlled phase gate for two spin qubits in coupled quantum dots
• Optical measurement and modeling of interactions between two hole or two electron spins in coupled InAs quantum dots
• Spin noise spectroscopy of quantum dot molecules
• Controlled Coherent Coupling in a Quantum Dot Molecule Revealed by Ultrafast Four-Wave Mixing Spectroscopy
• Towards Tripartite Hybrid Entanglement in Quantum Dot Molecules
• Understanding electric field control of electronic and optical properties of strongly-coupled multi-layer quantum dot molecules
• Optically Loaded Semiconductor Quantum Memory Register
• Electric-field switching of exciton spin splitting in coupled quantum dots
• Entanglement Dynamics of Molecular Exciton States in Coupled Quantum Dots
• Magnetic phases of one-dimensional lattices with 2 to 4 fermions per site
• Magnetism of quantum dot clusters: A Hubbard model study
• Gate-based protocol simulations for quantum repeaters using quantum-dot molecules in switchable electric fields
• Optical signatures of spin dependent coupling in semimagnetic quantum dot molecules
• Optical Spin Initialization and Non-Destructive Measurement in a Quantum Dot Molecule
• Antibonding ground states in semiconductor artificial molecules