GaAs photonic crystal cavity with ultrahigh Q: microwatt nonlinearity at 155 μm

Combrié, Sylvain; Rossi, Alfredo De; Tran, Quynh Vy; Bénisty, Henri

doi:10.1364/ol.33.001908

Cited by 102 publications

(66 citation statements)

References 10 publications

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“…Waveguide-coupled devices would therefore require much higher bare cavity Q to ensure that the light remains on the chip. A number of works have reported a bare cavity Q in GaAs photonic crystal cavities exceeding 250,000 43,44 , which could potentially enable both efficient on-chip coupling and high cooperativity. Employing regulated quantum dot growth techniques 45,46 in conjunction with local frequency tuning 47 could further open up the possibility to integrate multiple switches on a single semiconductor chip.…”

Section: Discussionmentioning

confidence: 99%

A quantum phase switch between a single solid-state spin and a photon

et al. 2016

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Strong interactions between single spins and photons are essential for quantum networks and distributed quantum computation. They provide the necessary interface for entanglement distribution, non-destructive quantum measurements, and strong photon-photon interactions.Achieving spin-photon interactions in a solid-state device could enable compact chip-integrated quantum circuits operating at gigahertz bandwidths. Many theoretical works have suggested using spins embedded in nanophotonic structures to attain this high-speed interface. These proposals exploit strong light-matter interactions to implement a quantum switch, where the spin flips the state of the photon and a photon flips the spin-state. However, such a switch has not yet been realized using a solid-state spin system. Here, we report an experimental realization of a spin-photon quantum switch using a single solid-state spin embedded in a nanophotonic cavity.We show that the spin-state strongly modulates the cavity reflection coefficient, which conditionally flips the polarization state of a reflected photon on picosecond timescales. We also demonstrate the complementary effect where a single photon reflected from the cavity coherently rotates the spin. These strong spin-photon interactions open up a promising direction for solidstate implementations of high-speed quantum networks and on-chip quantum information processors using nanophotonic devices. In this article we report an experimental demonstration of a quantum phase switch using a single solid-state spin embedded in a nanophotonic cavity. We implement this switch using a spin trapped in a charged quantum dot that is strongly coupled to a photonic crystal defect cavity. We show that the switch applies a spin-dependent phase shift on a reflected photon that rotates its polarization state. We also demonstrate the complementary effect where a single reflected photon applies a  phase shift to one of the spin-states and thereby coherently rotates the spin. These results demonstrate that the quantum switch retains phase coherence, an essential requirement for quantum information applications. We demonstrate switching of photon wavepackets as short as 63 ps, which corresponds to a three orders of magnitude increase in bandwidth over atom-based quantum switches. Our work represents a critical step towards interconnecting multiple solidstate spins using photons for implementing quantum networks and distributed quantum information protocols. Figure 1a The quantum phase switch allows one qubit to conditionally switch the quantum state of the other qubit. We consider the case where the polarization state of the photon encodes quantum information. Since photonic crystal cavities have a single mode with a well-defined polarization, we can express the state of a photon incident on the cavity in the basis states x and y , which denote the polarization states oriented orthogonal and parallel to the cavity mode respectively. OPERATING PRINCIPLEThe quantum state of a right-circularly polarized incident p...

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Section: Discussionmentioning

confidence: 99%

A quantum phase switch between a single solid-state spin and a photon

et al. 2016

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“…Neglecting the effects of pure dephasing for the moment being, we take Q a = 2Q b = 7 × 10 5 , and hence κ a = κ b /4 1 µeV at 1.5 µm. Such values have been experimentally demonstrated for fundamental photonic crystal cavity modes at 1.55 µm in state-of-art nanostructured cavities made of III-V materials 48 , and we have assumed that second-harmonic modes will have a Q-factor that is at least a factor of 2 smaller than the fundamental mode 49 . In summary, it should be noted that the scheme proposed here relies on the simultaneous realization of three main conditions for the nanostructured cavity: high Qfactor of fundamental mode, small mode volume, and double resonance.…”

Section: Nonlinear Couplingmentioning

confidence: 96%

Single-photon blockade in doubly resonant nanocavities with second-order nonlinearity

2013

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We propose the use of nanostructured photonic nanocavities made of χ (2) nonlinear materials as prospective passive devices to generate strongly sub-Poissonian light via single-photon blockade of an input coherent field. The simplest scheme is based on the requirement that the nanocavity be doubly resonant, i.e. possess cavity modes with good spatial overlap at both the fundamental and secondharmonic frequencies. We discuss feasibility of this scheme with state-of-the art nanofabrication technology, and the possibility to use it as a passive single-photon source on-demand.

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“…Coupling of the field mode to radiation modes above the light line causes decay of the field within the cavity; this coupling is minimized by moving two of the holes [46], resulting in a large . These large a e -cavities were first demonstrated for silicon membranes, but recent experiments on InP [51] and GaAs [52] cavities, show that the fabrication quality with these III-V materials is becoming comparable with silicon. Figure 5 (online color at: www.lpr-journal.org) Schematic diagram of single photon source based on a monolithic cavity; the green dot refers to the quantum dot, and the photon is emitted vertically via the leaky cavity mode.…”

Section: Single Photon Emission Within a Pc Cavitymentioning

confidence: 99%

On‐chip single photon sources using planar photonic crystals and single quantum dots

Yao

Rao

Hughes³

2010

Laser & Photonics Reviews

153

184

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We review the basic light-matter interactions and optical properties of chip-based single photon sources, that are enabled by integrating single quantum dots with planar photonic crystals. A theoretical framework is presented that allows one to connect to a wide range of quantum light propagation effects in a physically intuitive and straightforward way. We focus on the important mechanisms of enhanced spontaneous emission, and efficient photon extraction, using all-integrated photonic crystal components including waveguides, cavities, quantum dots and output couplers. The limitations, challenges, and exciting prospects of developing on-chip quantum light sources using integrated photonic crystal structures are discussed.A sequence of optical pulses (top right) interacting with a single quantum dot embedded in a photonic crystal system, resulting in the emission of a train of single photons on-chip.

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GaAs photonic crystal cavity with ultrahigh Q: microwatt nonlinearity at 155 μm

Cited by 102 publications

References 10 publications

A quantum phase switch between a single solid-state spin and a photon

A quantum phase switch between a single solid-state spin and a photon

Single-photon blockade in doubly resonant nanocavities with second-order nonlinearity

On‐chip single photon sources using planar photonic crystals and single quantum dots

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