An optical horn structure for single-photon source using quantum dots at telecommunication wavelength

Takemoto, Kazuhiro; Takatsu, Motomu; Hirose, Shinichi; Yokoyama, Naoki; Sakuma, Yoshiki; Usuki, Tatsuya; Miyazawa, T.; Arakawa, Yasuhiko

doi:10.1063/1.2723177

Cited by 101 publications

(104 citation statements)

References 23 publications

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“…We couple multiple InAs/InP quantum dots that serve as efficient single photon sources 22,29,30 to independent photonic crystal cavities fabricated in close proximity on the same chip. In order to match the cavity resonances and compensate for fabrication errors, we utilize combination of nitrogen gas deposition and local thermal evaporation.…”

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confidence: 99%

Two-Photon Interference from the Far-Field Emission of Chip-Integrated Cavity-Coupled Emitters

et al. 2016

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ABSTRACT. Interactions between solid-state quantum emitters and cavities are important for a broad range of applications in quantum communication, linear optical quantum computing, nonlinear photonics, and photonic quantum simulation. These applications often require combining many devices on a single chip with identical emission wavelengths in order to generate two-photon interference, the primary mechanism for achieving effective photon-photon interactions. Such integration remains extremely challenging due to inhomogeneous broadening and fabrication errors that randomize the resonant frequencies of both the emitters and cavities. In this letter we demonstrate two-photon interference from independent cavity-coupled emitters on the same chip, providing a potential solution to this long-standing problem. We overcome spectral mismatch between different cavities due to fabrication errors by depositing and locally evaporating a thin layer of condensed nitrogen. We integrate optical heaters to tune individual dots within each cavity to the same resonance with better than 3 µeV of precision. Combining these tuning methods, we demonstrate two-photon interference between two devices spaced by less than 15 µm on the same chip with a post-selected visibility of 33%. These results pave the way to integrate multiple quantum light sources on the same chip to develop quantum photonic devices.

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confidence: 99%

Two-Photon Interference from the Far-Field Emission of Chip-Integrated Cavity-Coupled Emitters

et al. 2016

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“…Semiconductor quantum dots are a promising platform for single [13][14][15][16][17][18] and entangled photon emitters 19,20 , owing to fundamentally sub-Poissonian emission statistics and common features with standard optoelectronics such as electrical control and pumping. So far, most progress has been made at shorter wavelengths around 900 nm, unsuitable for transmission over long distances in fibre.…”

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confidence: 99%

Coherent dynamics of a telecom-wavelength entangled photon source

et al. 2014

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Quantum networks can interconnect remote quantum information processors, allowing interaction between different architectures and increasing net computational power. Fibreoptic telecommunications technology offers a practical platform for routing weakly interacting photonic qubits, allowing quantum correlations and entanglement to be established between distant nodes. Although entangled photons have been produced at telecommunications wavelengths using spontaneous parametric downconversion in nonlinear media, as system complexity increases their inherent excess photon generation will become limiting. Here we demonstrate entangled photon pair generation from a semiconductor quantum dot at a telecommunications wavelength. Emitted photons are intrinsically antibunched and violate Bell's inequality by 17 standard deviations High-visibility oscillations of the biphoton polarization reveal the time evolution of the emitted state with exceptional clarity, exposing long coherence times. Furthermore, we introduce a method to evaluate the fidelity to a time-evolving Bell state, revealing entanglement between photons emitted up to 5 ns apart, exceeding the exciton lifetime.

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“…We use a hybrid approach that combines silicon photonic waveguides with InAs/InP quantum dots that act as efficient sources of single photons at telecom wavelength. [25][26][27] A pickand-place technique allows transferring of tapered InP nanobeams containing InAs quantum dots onto a silicon waveguide with nanometer-scale precision. The tapered nanobeams efficiently couple the emission from the quantum dot to the silicon waveguide.…”

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confidence: 99%

Hybrid Integration of Solid-State Quantum Emitters on a Silicon Photonic Chip

et al. 2017

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Scalable quantum photonic systems require efficient single photon sources coupled to integrated photonic devices. Solid-state quantum emitters can generate single photons with high efficiency, while silicon photonic circuits can manipulate them in an integrated device structure. Combining these two material platforms could, therefore, significantly increase the complexity of integrated quantum photonic devices. Here, we demonstrate hybrid integration of solid-state quantum emitters to a silicon photonic device. We develop a pickand-place technique that can position epitaxially grown InAs/InP quantum dots emitting at telecom wavelengths on a silicon photonic chip deterministically with nanoscale precision.We employ an adiabatic tapering approach to transfer the emission from the quantum dots to the waveguide with high efficiency. We also incorporate an on-chip silicon-photonic beamsplitter to perform a Hanbury-Brown and Twiss measurement. Our approach could enable integration of pre-characterized III-V quantum photonic devices into large-scale photonic structures to enable complex devices composed of many emitters and photons.Photonic quantum information processors use multiple interacting photons to implement quantum computors, 1,2 simulators, 3,4 and networks. [5][6][7][8] These applications require efficient single photon sources coupled to photonic circuits that implement qubit interactions to create highly connected multi-qubit systems. [8][9][10][11] Scalable photonic quantum information processors require methods to integrate single photon sources with compact photonic devices that can combine many optical components. Such integration could enable complex quantum information processors in a compact solid-state material. [12][13][14] Silicon has many advantages as a material for integrated quantum photonic devices. It has a large refractive index that enables many photonic components to fit into a small device size. [15][16][17] Electrical contacts incorporated into the photonic structure can rapidly modulate and reconfigure

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An optical horn structure for single-photon source using quantum dots at telecommunication wavelength

Cited by 101 publications

References 23 publications

Two-Photon Interference from the Far-Field Emission of Chip-Integrated Cavity-Coupled Emitters

Two-Photon Interference from the Far-Field Emission of Chip-Integrated Cavity-Coupled Emitters

Coherent dynamics of a telecom-wavelength entangled photon source

Hybrid Integration of Solid-State Quantum Emitters on a Silicon Photonic Chip

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