Mid-infrared quantum optics in silicon

Rosenfeld, Lawrence M.; Sulway, Dominic A.; Sinclair, Gary F.; Anant, Vikas; Thompson, Mark G.; Rarity, John; Silverstone, Joshua W.

doi:10.1364/oe.386615

Cited by 57 publications

(32 citation statements)

References 57 publications

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“…Once again, moving to a material with a wider band gap like SiN eliminates this problem. Alternatively, recent work has demonstrated the advantages of operating at longer wavelengths within silicon, to heavily suppress TPA, thus reducing nonlinear propagation losses whilst retaining the full toolbox of silicon photonic components [27]. Although supporting infrastructure for longer wavelength operation is still required.…”

Section: Photon Lossmentioning

confidence: 99%

2022 Roadmap on integrated quantum photonics

et al. 2022

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Integrated photonics will play a key role in quantum systems as they grow from few-qubit prototypes to tens of thousands of qubits. The underlying optical quantum technologies can only be realized through the integration of these components onto quantum photonic integrated circuits (QPICs) with accompanying electronics. In the last decade, remarkable advances in quantum photonic integration have enabled table-top experiments to be scaled down to prototype chips with improvements in efficiency, robustness, and key performance metrics. These advances have enabled integrated quantum photonic technologies combining up to 650 optical and electrical components onto a single chip that are capable of programmable quantum information processing, chip-to-chip networking, hybrid quantum system integration, and high-speed communications. In this roadmap article, we highlight the status, current and future challenges, and emerging technologies in several key research areas in integrated quantum photonics, including photonic platforms, quantum and classical light sources, quantum frequency conversion, integrated detectors, and applications in computing, communications, and sensing. With advances in materials, photonic design architectures, fabrication and integration processes, packaging, and testing and benchmarking, in the next decade we can expect a transition from single- and few-function prototypes to large-scale integration of multi-functional and reconfigurable devices that will have a transformative impact on quantum information science and engineering.

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Section: Photon Lossmentioning

confidence: 99%

2022 Roadmap on integrated quantum photonics

et al. 2022

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“…Together with recently developed techniques for satellite-to-ground entanglement distribution and QKD [9,10], our approach could lead to the future development of a new generation of metropolitan quantum networks. Moreover, the recent development of hollow core fibres [18,20,50], on chip components for light generation and manipulation [27], and GHz-bandwidth switching devices in the 2-µm band [51] suggest the 2µm band as one which will support interconnectivity between the guided-wave, integrated, and free-space platforms, which could further extend the applicability in future full-scale DIQKD implementations, and allow distribution of entangled photons over large distances between nodes through fiber optic networks. Our results further lay the foundations for advanced quantum technologies in the mid-infrared spectral region.…”

Section: Discussionmentioning

confidence: 99%

“…For DIQKD, the resource state must demonstrate a combination of low QBER and sufficiently large Bell inequality violation to yield a positive (i.e., greater-than-zero) secure key rate [15]. Previously, quantum interference and polarization entangle-ment in free space with CHSH-Bell inequality violation by 2.2 standard deviations [23] and quantum interference with heralded single photons on chip [27] was demonstrated in the 2-µm band. However, the capability for general projective measurements and full characterization of single and entangled qubit states in the midinfrared region has not previously been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Near-Maximal Two-Photon Entanglement for Optical Quantum Communication at 2.1μm

et al. 2021

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Owing to a reduced solar background and low propagation losses in the atmosphere, the 2-to 2.5-µm waveband is a promising candidate for daylight quantum communication. This spectral region also offers low losses and low dispersion in hollow-core fibers and in silicon waveguides. We demonstrate near-maximally entangled photon pairs at 2.1 µm that could support device independent quantum key distribution (DIQKD) assuming sufficiently high channel efficiencies. The state corresponds to a positive secure-key rate (0.254 bits/pair, with a quantum bit error rate of 3.8%) based on measurements in a laboratory setting with minimal channel loss and transmission distance. This is promising for the future implementation of DIQKD at 2.1 µm.

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“…Other works show the interest in the MIR region for quantum optics applications, e.g. imaging [233] or sensing [234] or space communication [235], and the need of advancements [236][237][238].…”

Section: Heralded Single-photon Sourcesmentioning

confidence: 99%

Thirty Years in Silicon Photonics: A Personal View

Pavesi

2021

Front. Phys.

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Silicon Photonics, the technology where optical devices are fabricated by the mainstream microelectronic processing technology, was proposed almost 30 years ago. I joined this research field at its start. Initially, I concentrated on the main issue of the lack of a silicon laser. Room temperature visible emission from porous silicon first, and from silicon nanocrystals then, showed that optical gain is possible in low-dimensional silicon, but it is severely counterbalanced by nonlinear losses due to free carriers. Then, most of my research focus was on systems where photons show novel features such as Zener tunneling or Anderson localization. Here, the game was to engineer suitable dielectric environments (e.g., one-dimensional photonic crystals or waveguide-based microring resonators) to control photon propagation. Applications of low-dimensional silicon raised up in sensing (e.g., gas-sensing or bio-sensing) and photovoltaics. Interestingly, microring resonators emerged as the fundamental device for integrated photonic circuit since they allow studying the hermitian and non-hermitian physics of light propagation as well as demonstrating on-chip heavily integrated optical networks for reconfigurable switching applications or neural networks for optical signal processing. Finally, I witnessed the emergence of quantum photonic devices, where linear and nonlinear optical effects generate quantum states of light. Here, quantum random number generators or heralded single-photon sources are enabled by silicon photonics. All these developments are discussed in this review by following my own research path.

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Mid-infrared quantum optics in silicon

Cited by 57 publications

References 57 publications

2022 Roadmap on integrated quantum photonics

2022 Roadmap on integrated quantum photonics

Near-Maximal Two-Photon Entanglement for Optical Quantum Communication at 2.1μm

Thirty Years in Silicon Photonics: A Personal View

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