Integrated sources of photon quantum states based on nonlinear optics

Caspani, Lucia; Xiong, Chunle; Eggleton, Benjamin J.; Bajoni, Daniele; Liscidini, Marco; Galli, Mattéo; Morandotti, Roberto; Moss, David J.

doi:10.1038/lsa.2017.100

Cited by 258 publications

(181 citation statements)

References 220 publications

(251 reference statements)

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“…Being the latter orders of magnitude more intense than the corresponding quantum process, integration times have been enormously decreased, and the resolution improved compared to spectrally resolved coincidence measurements [17]. The Joint Spectral Amplitude is the function describing the spectral correlations of the photon pair [8]. So far, most of the applications of SET focused on the determination of 2 Stimulated emission tomography on an Add-Drop resonator One of the key hypothesis of SET is that the Seed laser, with wavevector k s , must be coupled in the same asymptotic output field of the corresponding photon of the pair [15].…”

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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“…[] for studies related to efficient fiber‐coupling of photon pairs. We note, that photon pairs with tailored properties can also be generated in waveguide structures . However, as these have up to now not been used for quantum imaging, we will restrict our discussion to bulk nonlinear crystals.…”

Section: Fundamentalsmentioning

confidence: 99%

“…In addition, we would like to mention several review papers and overview articles covering topics that are touched on here but are beyond the scope of this review: single photon sources and detectors, integrated‐optical sources of entangled photons, and generation of photon pairs via spontaneous four wave mixing …”

Section: Introductionmentioning

confidence: 99%

Perspectives for Applications of Quantum Imaging

Basset

Setzpfandt

Steinlechner

et al. 2019

Laser & Photonics Reviews

111

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Quantum imaging is a multifaceted field of research that promises highly efficient imaging in extreme spectral ranges as well as ultralow‐light microscopy. Since the first proof‐of‐concept experiments over 30 years ago, the field has evolved from highly fascinating academic research to the verge of demonstrating practical technological enhancements in imaging and microscopy. Here, the aim is to give researchers from outside the quantum optical community, in particular those applying imaging technology, an overview of several promising quantum imaging approaches and evaluate both the quantum benefit and the prospects for practical usage in the near future. Several use case scenarios are discussed and a careful analysis of related technology requirements and necessary developments toward practical and commercial application is provided.

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“…Photons are becoming a necessary element of quantum information with the format of state representation and have been widely used in optical quantum information science, including quantum teleportation, one‐way quantum computation, quantum simulation, and quantum metrology . Integrated photonics has been gradually recognized as a promising platform to generate and manipulate a quantum photonic state due to the low pump power requirement, high stability, and scalability, and advantageous portability for distributed quantum networks . In various platforms for quantum photonic integrated circuits (QPICs), the silicon‐on‐insulator (SOI) technology has been considered as one of the most promising options to realize high‐quality photon‐pair sources because of its unique advantages .…”

Section: Introductionmentioning

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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Integrated sources of photon quantum states based on nonlinear optics

Cited by 258 publications

References 220 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

Perspectives for Applications of Quantum Imaging

Progress on Integrated Quantum Photonic Sources with Silicon

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