Coherent optical control a single hole spin in a quantum dot

Godden, T. M.; Quilter, J. H.; Ramsay, Andrew J.; Boyle, S. J.; Luxmoore, I. J.; Puebla, Jorge; Fox, A. M.; Skolnick, M. S.; Wu, Yanwen; Brereton, Peter

doi:10.1364/qels.2012.qm3g.1

Cited by 16 publications

(25 citation statements)

References 17 publications

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“…There is a rather large spread of measured T * 2 for the hole spin: >100 ns using coherent population trapping 3 and 2 to 20 ns in ultra-fast optical measurements of the hole spin Ramsey fringes [6][7][8] . It is also an emerging paradigm that electrical noise in the diodes comprising hole-charged QDs may be a factor strongly limiting the T * 2 values 6,7 .…”

Section: Dynamic Nuclear Polarizationmentioning

confidence: 99%

Nuclear spin effects in semiconductor quantum dots

et al. 2013

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Section: Dynamic Nuclear Polarizationmentioning

confidence: 99%

Nuclear spin effects in semiconductor quantum dots

et al. 2013

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“…Although cavities with degenerate polarization modes can be designed theoretically [97], the degeneracy is usually broken in real devices due to fabrication imperfections, and complex steps are usually required to restore the cavity mode degeneracy [98][99][100]. More importantly, all-optical coherent control typically requires a strong in-plane magnetic field to break the selection rules [21][22][23][24][25][26], which also breaks the degeneracy of the spin transitions.…”

Section: Discussionmentioning

confidence: 99%

“…All the optical coherent spin manipulation experiments reported so far utilized a charged quantum dot in the Voigt configuration [21][22][23][24][25][26]. Due to the presence of the λ-system, a detuned broadband optical pulse could induce effective Rabi oscillations between two spin ground states.…”

Section: Coherent Spin Manipulationmentioning

confidence: 99%

“…But the highest spin readout fidelity reported so far is only ∼ 84%, limited by the imperfect cycling transition caused by the non-radiative decay mechanism for the optical forbidden transitions. In addition, it is more desired to realize single-shot spin readout in the Voigt configuration because this geometry is the prerequisite for all-optical coherent spin manipulation [21][22][23][24][25][26]. The selection rules in the Voigt configuration does not support a cycling transition, eliminating the possibility for single-shot readout using typical fluorescence light detection technique.…”

Section: Analysis Of Fidelity For a Quantum Dot Based Cavity Qed Systemmentioning

confidence: 99%

“…This trapped spin system provides a promising quantum memory with microsecond coherence time [20,21] and picosecond timescale single-qubit gates [21][22][23][24][25][26], enabling a large number of quantum operations prior to qubit decoherence. Furthermore, the spin ground states of the charged quantum dot are optically coupled to excited trion states that exhibit nearly radiatively limited emission [27].…”

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confidence: 99%

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Nanophotonic Quantum Interface for a Single Solid-state Spin

Sun

Kim

Solomon

et al. 2016

Conference on Lasers and Electro-Optics

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The ability to store and transmit quantum information plays a central role in virtually all quantum information processing applications. Single spins serve as pristine quantum memories whereas photons are ideal carriers of quantum information. Strong interactions between these two systems provide the necessary interface for developing future quantum networks and distributed quantum computers.They also enable a broad range of critical quantum information functionalities such as entanglement distribution, non-destructive quantum measurements and strong photon-photon interactions. Realizing spin-photon interactions in a solid-state device is particularly desirable because it opens up the possibility of chip-integrated quantum circuits that support gigahertz bandwidth operation.In this thesis, I demonstrate a nanophotonic quantum interface between a single solid-state spin and a photon, and explore its applications in quantum information processing. First, we experimentally realize a spin-photon quantum phase switch based on a strongly coupled quantum dot and photonic crystal cavity system. This device enables coherent light-matter interactions at the fundamental limit, where a single spin controls the polarization of a photon and a single photon flips the spin state. Furthermore, we theoretically propose a way to deterministically generate spin-photon entanglement based on the spin-photon quantum interface, which is an important step towards solid-state implementations of quantum repeaters and quantum networks. Next, we show both theoretically and experimentally, a new method to optically read out a solid-state spin based on the same cavity quantum electrodynamics (QED) system. This new method achieves significant improvement in spin readout fidelity over typical approaches using fluorescence light detection.In the end, we report efforts to realize tunable and robust quantum dot based cavity QED systems. We present a technique for tuning the frequency of a quantum dot that is strongly coupled to a photonic crystal cavity by applying strain. This tuning technique enables us to accurately control the detuning between a quantum dot and a cavity without affecting other emission properties of the dot, which is essential for lots of applications associated with cavity QED systems, including non-classical light generation, photon blockade, single photon level optical switch, and also our major focus, the spin-photon quantum interface.

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Localized All‐Optical Control of Single Semiconductor Quantum Dots through Plasmon Polariton‐Induced Screening

Seaton

Krasnok

Bracker

et al. 2018

Advanced Optical Materials

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Due to their ability to strongly modify the local optical field through the excitation of surface plasmon polaritons (SPPs), plasmonic nanostructures are often used to reshape the emission direction and enhance the radiative decay rate of quantum emitters, such as semiconductor quantum dots (QDs). These features are essential for quantum information processing, nanoscale photonic circuitry, and optoelectronics. However, the modification and enhancement demonstrated thus far have typically led to drastic alterations of the local energy density of the emitters, and hence their intrinsic optical properties, leaving little room for active control. Here, dynamic tuning of the energy states of a single semiconductor QD is demonstrated by optically modifying its local dielectric environment with a nearby plasmonic structure, instead of directly coupling it to the QD. This technique leaves intact the intrinsic optical properties of the QD, while enabling a reversible all‐optical control mechanism that operates below the diffraction limit at low power levels.

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Coherent optical control a single hole spin in a quantum dot

Cited by 16 publications

References 17 publications

Nuclear spin effects in semiconductor quantum dots

Nuclear spin effects in semiconductor quantum dots

Nanophotonic Quantum Interface for a Single Solid-state Spin

Localized All‐Optical Control of Single Semiconductor Quantum Dots through Plasmon Polariton‐Induced Screening

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