Strong coupling between a photonic crystal nanobeam cavity and a single quantum dot

Ohta, Ryuichi; Ota, Yasutomo; Nomura, Masahiro; Kumagai, Naoto; Ishida, Shintaro; Iwamoto, Satoshi; Arakawa, Yasuhiko

doi:10.1063/1.3579535

Cited by 98 publications

(75 citation statements)

References 19 publications

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“…Based on the theoretical calculation, single-shot regime could be achieved by improving the overall photon collection efficiency, which could be achieved by using cavity designs that enhance directional emission [126][127][128] or using single photon detectors that have higher quantum efficiency [132]. We can also improve the spin readout fidelity by improving the system cooperativity, which could be achieved by using cavities with smaller mode volume [133,134] or higher quality factor [125,135,136].…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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 QD cavity QED is a promising solid-state platform for information and communication technology (ICT) due to their inherent scalability and mature semiconductor technology. However, the photon blockade resulting from the anharmonicity of Jaynes-Cummings energy ladder [32] is hard to achieve due to the small ratio of the QD-cavity coupling strength to the system dissipation rates [10,11,30,31,[33][34][35][36][37] compared with other systems [22][23][24][25][26][27][28][29]. Moreover, the gain of this SPT based on photon blockade is quite limited and only 2.2 is expected for In(Ga)As QDs [10,11].…”

Section: Introductionmentioning

confidence: 99%

Spin-based single-photon transistor, dynamic random access memory, diodes, and routers in semiconductors

Hu¹

2016

Phys. Rev. B

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The realization of quantum computers and quantum Internet requires not only quantum gates and quantum memories, but also transistors at single-photon levels to control the flow of information encoded on single photons. Single-photon transistor (SPT) is an optical transistor in the quantum limit, which uses a single photon to open or block a photonic channel. In sharp contrast to all previous SPT proposals which are based on single-photon nonlinearities, here I present a novel design for a high-gain and high-speed (up to THz) SPT based on a linear optical effect -giant circular birefringence (GCB) induced by a single spin in a double-sided optical microcavity. A gate photon sets the spin state via projective measurement and controls the light propagation in the optical channel. This spin-cavity transistor can be directly configured as diodes, routers, DRAM units, switches, modulators, etc. Due to the duality as quantum gate and transistor, the spin-cavity unit provides a solid-state platform ideal for future Internet -a mixture of all-optical Internet with quantum Internet.

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“…1(a). This is a model of wide importance, though later we shall consider specific parameters relevant to QD-microcavity systems to provide experimental context [10,16,[31][32][33][34]. Within a frame rotating at the laser frequency ω L , and after a rotating-wave approximation, the system Hamiltonian is…”

Section: Modelmentioning

confidence: 99%

Quantum correlations of light and matter through environmental transitions

Iles-Smith¹,

Nazir²

2016

Optica

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One aspect of solid-state photonic devices that distinguishes them from their atomic counterparts is the unavoidable interaction between system excitations and lattice vibrations of the host material. This coupling may lead to surprising departures in emission properties between solid-state and atomic systems. Here we predict a striking and important example of such an effect. We show that in solid-state cavity quantum electrodynamics, interactions with the host vibrational environment can generate quantum cavity-emitter correlations in regimes that are semiclassical for atomic systems. This behaviour, which can be probed experimentally through the cavity emission properties, heralds a failure of the semiclassical approach in the solid-state, and challenges the notion that coupling to a thermal bath supports a more classical description of the system. Furthermore, it does not rely on the spectral details of the host environment under consideration and is robust to changes in temperature. It should thus be of relevance to a wide variety of photonic devices.

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Strong coupling between a photonic crystal nanobeam cavity and a single quantum dot

Cited by 98 publications

References 19 publications

Nanophotonic Quantum Interface for a Single Solid-state Spin

Nanophotonic Quantum Interface for a Single Solid-state Spin

Spin-based single-photon transistor, dynamic random access memory, diodes, and routers in semiconductors

Quantum correlations of light and matter through environmental transitions

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