Large-scale quantum photonic circuits in silicon

Harris, Nicholas C.; Bunandar, Darius; Pant, Mihir; Steinbrecher, Greg; Mower, Jacob; Prabhu, Mihika; Baehr‐Jones, Tom; Hochberg, Michael; Englund, Dirk

doi:10.1515/nanoph-2015-0146

Cited by 143 publications

(113 citation statements)

References 116 publications

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“…One of the most appealing platforms for photonic quantum technolgies is integrated optics [1,2]. Since the first demonstrations more than a decade ago [3], the complexity and scale of quantum optical circuits exponentially increased over the years [4,5,6,7]. Irrespective of their application, key elements shared by every photonic circuit are photon sources.…”

Section: Introductionmentioning

confidence: 99%

Phase-resolved joint spectra tomography of a ring resonator photon pair source using a silicon photonic chip

Borghi¹

2020

Opt. Express

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The exponential growth of photonic quantum technologies is driving the demand of tools for measuring the quality of their information carriers. One of the most prominent is Stimulated Emission Tomography (SET), which uses classical coherent fields to measure the Joint Spectral Amplitude (JSA) of photon pairs with high speed and resolution. While the modulus of the JSA can be directly addressed from a single intensity measurement, the retrieval of the Joint Spectral Phase (JSP) is far more challenging and received minor attentions. However, a wide class of spontaneous sources of technological relevance, as chip integrated micro-resonators, have a JSP with a rich structure, that carries correlations hidden in the intensity domain. Here, using a compact and reconfigurable silicon photonic chip, it is measured for the first time the complex JSA of a micro-ring resonator photon pair source. The photonic circuit coherently excites the ring and a reference waveguide, and the interferogram formed by their stimulated fields is used to map the ring JSP through a novel phase reconstruction technique. This tool complements the traditionally bulky and sophisticated methods implemented so far, simultaneously minimizing the set of required resources.A PREPRINT -JANUARY 10, 2020 the modulus of the JSA, referred as the Joint Spectral Intensity (JSI), since it is directly measurable from the power of the stimulated field. Examples includes silicon nanowires [18], AlGaAs ridge waveguides [19], optical fibers [20,21], All-Pass resonators [22] and coupled rings [23]. A variation of SET, which implements Sum Frequency Generation (SFG), has been used to map the JSA of an array of evanescently coupled Lithium Niobate waveguides [24]. A method for the extraction of the complex JSA in multi-port devices, which implements DFG, has been proposed based on the eigenmode expansion of single channel excitations [25]. SET has been also extended to others degrees of freedom, like space [24] and polarization [26,27]. The Joint Spectral Phase (JSP) is of the same relevance of the JSI, but historically received minor attentions. The JSI itself is, however, an incomplete picture of the quantum state, since it hides the spectral correlations encoded in the phase domain [28]. As an example, only the lower bound of the Schmidt number can be estimated if the JSP is not known [19]. Beside quantum homodyne tomography of two photon states [29,30], which suffers the same time and resolution issues of spectrally resolved coincidence measurements, phase resolved applications of SET have been so far limited to in-line sources as waveguides [28,31] or cold atomic ensembles [32]. In all these works, the Pump, the Seed and the reference beams are all carved from the same laser source to guarantee mutual coherence, and fiber based interferometers are used to extract the JSP.Here, a novel technique which allows to measure the complex JSA of a double bus, integrated silicon ring resonator, is proposed and experimentally validated. The method exploits the on-chip inte...

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Section: Introductionmentioning

confidence: 99%

Phase-resolved joint spectra tomography of a ring resonator photon pair source using a silicon photonic chip

Borghi¹

2020

Opt. Express

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“…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 these components by free-carrier injection on fast timescales. 18,19 Silicon is also compatible with standard CMOS fabrication methods that can combine electronics with photonics on a large scale.…”

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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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“…demonstrated the preparation of a 15D entangled state with silicon, as shown in Figure . The importance of this work is the exploration of high‐dimensional quantum information and the demonstration of the large‐scale integration ability of silicon chips, which encourages researchers to develop large‐scale integrated functional quantum devices with silicon photonics.…”

Section: Two‐photon Entangled State Preparationmentioning

confidence: 99%

Progress on Integrated Quantum Photonic Sources with Silicon

2019

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The high stability and scalability of integrated circuits make them a reliable and practical platform for photonic quantum information processing. In various platforms for quantum photonic integrated circuits, the silicon‐on‐insulator technology, with its strong nonlinear effect and mature fabrication technology, has gradually emerged in the preparation of quantum photonic sources. This report presents a review of this series of research advances in the preparation of a quantum photonic source, based on the spontaneously four‐wave mixing process in a silicon waveguide, especially chip‐scale entangled states that have been realized in recent years.

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Large-scale quantum photonic circuits in silicon

Cited by 143 publications

References 116 publications

Phase-resolved joint spectra tomography of a ring resonator photon pair source using a silicon photonic chip

Phase-resolved joint spectra tomography of a ring resonator photon pair source using a silicon photonic chip

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

Progress on Integrated Quantum Photonic Sources with Silicon

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