Vacuum Rabi splitting with a single quantum dot embedded in a H1 photonic crystal nanocavity

Ota, Yasutomo; Shirane, Masayuki; Nomura, Masahiro; Kumagai, Naoto; Ishida, Shintaro; Iwamoto, Satoshi; Yorozu, Shinichi; Arakawa, Yasuhiko

doi:10.1063/1.3073859

Cited by 47 publications

(36 citation statements)

References 16 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%

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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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Section: Discussionmentioning

confidence: 99%

“…Smaller mode-volume cavity designs could enable higher switching fidelity and spin readout fidelity by improving the system cooperativity [133,134].…”

Section: Chapter 7: Conclusion and Future Directionsmentioning

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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“…We demonstrate that effects of the multi-level structure of QDs may give qualitatively different behavior in PC cavities than is the case for a two-level description. Both the emission dynamics and spectra are significantly modified, which could have direct consequences for a number of previous experimental demonstrations [5][6][7][8][9][10][11]. The study adds to the current understanding that the complex near-field polarization effects found in photonic nanostructures lead to new physics; another recent example being that of chiral photon-emitter coupling [12,13] We consider the situation of a self-assembled QD positioned in a photonic-crystal cavity, as outlined in Fig.…”

Section: Introductionmentioning

confidence: 99%

Role of multilevel states on quantum-dot emission in photonic-crystal cavities

2016

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Semiconductor quantum dots embedded in photonic-crystal nanostructures have been the subject of intense study. In this context, quantum dots are often considered to be simple two-level emitters, i.e., the complexities arising from the internal finestructure are neglected. We show that due to the intricate spatial variations of the electric field polarization found in photonic crystal, the two orthogonal finestructure states of quantum dots in general both couple significantly to a cavity mode, implying that the two-level description is not sufficient. As a consequence the emission dynamics and spectra, which are often recorded in experiments, are modified both in the weak-and strongcoupling regimes. The proposed effects are found to be significant for system parameters of current state-of-the-art photonic-crystal cavities.

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“…Larger transfer contrasts could be attained by increasing the cavity-quantum dot coupling strength and reducing cavity losses using deterministic alignment 28 and better cavity designs 29,30 . Current state-of-the-art quantum dot cavity QED systems have already achieved 3 31 .…”

Section:     mentioning

confidence: 99%

All-optical coherent control of vacuum Rabi oscillations

et al. 2014

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These authors contributed equally * Correspondence should be sent to E.W.: edowaks@umd.edu When an atom strongly couples to a cavity, it can undergo coherent vacuum Rabi oscillations.Controlling these oscillatory dynamics quickly relative to the vacuum Rabi frequency enables remarkable capabilities such as Fock state generation and deterministic synthesis of quantum states of light, as demonstrated using microwave frequency devices 1,2 . At optical frequencies, however, dynamical control of single-atom vacuum Rabi oscillations remains challenging. Here, we demonstrate coherent transfer of optical frequency excitation between a single quantum dot and a cavity by controlling vacuum Rabi oscillations. We utilize a photonic molecule 3-7 to simultaneously attain strong coupling and a cavity-enhanced AC Stark shift. The Stark shift modulates the detuning between the two systems on picosecond timescales, faster than the vacuum Rabi frequency. We demonstrate the ability to add and remove excitation from the cavity, and perform coherent control of light-matter states. These results enable ultra-fast control of atom-cavity interactions in a nanophotonic device platform.Much of the prior work investigating atomic systems strongly coupled to optical cavities has operated in the static regime. In this regime the coupling between the two systems remains constant and 2 the signature of strong coupling is observed either in the frequency domain in the form of vacuum Rabi splitting [8][9][10][11] , or by direct time-domain observation of vacuum Rabi oscillations 12 . Recently, there has been significant experimental progress in optically controlling the dynamical response of atomic systems strongly coupled to cavities for applications such as optical switching [13][14][15][16] , reversible storage of photonic qubits 17,18 , and hybrid quantum information processing 19,20 . These works have all operated in the adiabatic regime where the duration of the optical control pulse was long compared to the vacuum Rabi frequency.When the interaction between the atom and cavity is modulated fast compared the vacuum Rabi frequency, the system undergoes diabatic rapid passage. In this regime it becomes possible to coherently transfer energy between an atomic excitation and a cavity photon by directly controlling vacuum Rabi oscillations. This coherent transfer has been effectively implemented at microwave frequencies and has enabled capabilities such as Fock state generation 1 and synthesis of arbitrary photonic wavefunctions 2 . At optical frequencies, however, diabatic control of vacuum Rabi oscillations between a single atomic system and a cavity remains difficult.In this letter we report a demonstration of controlled transfer of excitation between a semiconductor quantum dot and a strongly coupled optical cavity by directly controlling vacuum Rabi oscillations diabatically. We use a pulsed AC Stark shift to control the detuning between the quantum dot and cavity on picosecond timescales, enabling ultra-fast control of light-matter intera...

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Vacuum Rabi splitting with a single quantum dot embedded in a H1 photonic crystal nanocavity

Cited by 47 publications

References 16 publications

Nanophotonic Quantum Interface for a Single Solid-state Spin

Nanophotonic Quantum Interface for a Single Solid-state Spin

Role of multilevel states on quantum-dot emission in photonic-crystal cavities

All-optical coherent control of vacuum Rabi oscillations

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