Parasitic Photon-Pair Suppression via Photonic Stop-Band Engineering

Helt, L. G.; Brańczyk, Agata M.; Liscidini, Marco; Steel, M. J.

doi:10.1103/physrevlett.118.073603

Cited by 14 publications

(12 citation statements)

References 33 publications

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“…The pump and entangled photon pairs can be placed within the telecommunications wavelength range, where low-noise pump laser diodes and filters are readily available. A dual-pump SFWM process can be used to generate frequency-degenerate signal and idler photons, with some additional considerations for noise management [102]. In contrast to fiber or SiN sources, the Raman noise contribution in Si SFWM is narrowband, and spectrally well separated from the pump.…”

Section: Statusmentioning

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: Statusmentioning

confidence: 99%

2022 Roadmap on integrated quantum photonics

et al. 2022

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“…For squeezing in a single mode, a prerequisite is to be in the degenerate squeezing regime, where the signal and idler frequencies are within the same resonance. However, other concurrent processes can lead to parasitic effects polluting the squeezed light [34,36,37]. The study of such parasitic processes is essential to the identification of proper suppression strategies.…”

Section: Introductionmentioning

confidence: 99%

Degenerate squeezing in a dual-pumped integrated microresonator: parasitic processes and their suppression

Seifoory,

Vernon,

Mahler

et al. 2021

Preprint

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Using a general Hamiltonian treatment, we theoretically study the generation of degenerate quadrature squeezing in a dual-pumped integrated microring resonator coupled to a waveguide. Considering a dual-pump four-wave mixing configuration in an integrated Si3N4 platform, and following the coupled-mode theory approach, we investigate the effects of parasitic quantum nonlinear optical processes on the generation of squeezed light. Considering five resonance modes in this approach allows us to include the most important four-wave mixing processes involved in such a configuration. We theoretically explore the effects of the pump detunings on different nonlinear processes and show that the effects of some of the parasitic processes are effectively neutralized by symmetrically detuning the two pumps. This yields a significant enhancement in the output squeezing quality without physically changing the structure, but suffers from the trade-off of requiring substantially higher pump power for a fixed target level of squeezing.

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“…GVD is negligible for sufficiently narrow pump functions. In this limit, the Hamiltonian governing χ (2) processes is equivalent to single-pump χ (3) processes [37] (but not to dual-pump SFWM [38][39][40][41]). We comment on this in Appendix A 3.…”

Section: Introductionmentioning

confidence: 99%

Gaussian functions are optimal for waveguided nonlinear-quantum-optical processes

Quesada

Brańczyk

2018

Phys. Rev. A

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Many nonlinear optical technologies require the two-mode spectral amplitude function that describes them-the joint spectral amplitude (JSA)-to be separable. We prove that the JSA factorizes only when the incident pump field and phase-matching function are Gaussian functions. We show this by mapping our problem to a known result, in continuous variable quantum information, that only squeezed states remain unentangled when combined on a beam splitter. We then conjecture that only a squeezed state minimizes entanglement when sent through a beam splitter with another pre-specified ket. This implies that to maximize JSA separability when one of the (pump or nonlinear medium) functions is non-Gaussian, the other function must be Gaussian. This answers an outstanding question about optimal design of certain nonlinear processes, and is of practical interest to researchers using waveguide nonlinear optics to generate and manipulate quantum light.

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Parasitic Photon-Pair Suppression via Photonic Stop-Band Engineering

Cited by 14 publications

References 33 publications

2022 Roadmap on integrated quantum photonics

2022 Roadmap on integrated quantum photonics

Degenerate squeezing in a dual-pumped integrated microresonator: parasitic processes and their suppression

Gaussian functions are optimal for waveguided nonlinear-quantum-optical processes

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