Quantum light generation on a silicon chip using waveguides and resonators

Ong, Jun Rong; Mookherjea, Shayan

doi:10.1364/oe.21.005171

Cited by 47 publications

(55 citation statements)

References 33 publications

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“…In addition, this is the first report of photon pair generation using the intra-band FWM process in CROWs. Very recently, Ong and Mookherjea proposed that the intra-band FWM of a CROW is useful for applications such as tailoring a two-photon joint spectrum [42].…”

Section: Discussionmentioning

confidence: 99%

Slow light enhanced correlated photon pair generation in photonic-crystal coupled-resonator optical waveguides

Matsuda¹,

Takesue²,

Shimizu³

et al. 2013

Opt. Express

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We demonstrate the generation of quantum-correlated photon pairs from a Si photonic-crystal coupled-resonator optical waveguide. A slow-light supermode realized by the collective resonance of high-Q and small-mode-volume photonic-crystal cavities successfully enhanced the efficiency of the spontaneous four-wave mixing process. The generation rate of photon pairs was improved by two orders of magnitude compared with that of a photonic-crystal line defect waveguide without a slow-light effect.

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Section: Discussionmentioning

confidence: 99%

Slow light enhanced correlated photon pair generation in photonic-crystal coupled-resonator optical waveguides

Matsuda¹,

Takesue²,

Shimizu³

et al. 2013

Opt. Express

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“…Therefore, we can easily rescale the y-axis of the plot and calculate the joint-spectral intensity (JSI, see ref. [11,29]) between the signal and idler frequencies, as shown in b. Note that this rescaling works only for a continuous-wave pump because for a pulsed pump source, the above energy conservation relation holds only up to the spectral bandwidth of the pump, signal and idler photons.…”

Section: Source Characterizationmentioning

confidence: 99%

“…where η is the strength of the SFWM and depends on the material and ring waveguide properties [28,29]. The signal and idler modes are initially in the vacuum state when the input pump photons enter the system.…”

mentioning

confidence: 99%

“…However, the nonlinear interaction coherently adds or removes photon pairs from these vacuum modes and leads to generation of non-classical fields with intensity and spectral correlations between signal and idler photons [26]. Furthermore, because of energy conservation, correlated signal and idler photon pairs are generated in longitudinal modes (of individual resonators) located symmetrically on either side of the pump mode [28,29]. We choose signal and idler modes a single FSR above and below the pump mode with resonance frequencies denoted by ω 0s , ω 0i and ω 0p , respectively ( Fig.1b).…”

mentioning

confidence: 99%

“…For a continuous-wave pump, measurement of Γ (ω s , ω p ) is equivalent to a measurement of the joint-spectral intensity which is commonly used to characterize the spectral correlations between generated photons (see Extended Data Fig.E4 and refs. [11,29]). Firstly, we observe that the maximum number of photons are generated when the lattice is pumped in the CW edge band, at ω p − ω 0p −1.5J.…”

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confidence: 99%

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A topological source of quantum light

Mittal

Goldschmidt

Hafezi

2018

Nature

261

177

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Quantum light is characterized by distinctive statistical distributions that are possible only because of quantum mechanical effects. For example, single photons and correlated photon pairs exhibit photon number distributions with variance lower than classically allowed limits. This enables high-fidelity transmission of quantum information and sensing with lower noise than possible with classical light sources. Most quantum light sources rely on spontaneous parametric processes such as down-conversion and four-wave mixing. These processes are mediated by vacuum fluctuations of the electromagnetic field. Therefore, by manipulating the electromagnetic mode structure, for example with dispersion-engineered nanophotonic systems, the spectrum of generated photons can be controlled. However, disorder, which is ubiquitous in nanophotonic fabrication, causes device-to-device spectral variations. Here we realize topologically robust electromagnetic modes and use their vacuum fluctuations to create a quantum light source in which the spectrum of generated photons is much less affected by fabrication-induced disorder. Specifically, we use the topological edge states realized in a two-dimensional array of ring resonators to generate correlated photon pairs by spontaneous four-wave mixing and show that they outperform their topologically trivial one-dimensional counterparts in terms of spectral robustness. We demonstrate the non-classical nature of the generated light and the realization of a robust source of heralded single photons by measuring the conditional antibunching of photons, that is, the reduced likelihood of photons arriving together compared to thermal or laser light. Such topological effects, which are unique to bosonic systems, could pave the way for the development of robust quantum photonic devices.

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Controlling the spectrum of photons generated on a silicon nanophotonic chip

et al. 2014

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Directly modulated semiconductor lasers are widely used, compact light sources in optical communications. Semiconductors can also be used to generate nonclassical light; in fact, CMOS-compatible silicon chips can be used to generate pairs of single photons at room temperature. Unlike the classical laser, the photon-pair source requires control over a two-dimensional joint spectral intensity (JSI) and it is not possible to process the photons separately, as this could destroy the entanglement. Here we design a photon-pair source, consisting of planar lightwave components fabricated using CMOS-compatible lithography in silicon, which has the capability to vary the JSI. By controlling either the optical pump wavelength, or the temperature of the chip, we demonstrate the ability to select different JSIs, with a large variation in the Schmidt number. Such control can benefit high-dimensional communications where detector-timing constraints can be relaxed by realizing a large Schmidt number in a small frequency range.

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Quantum light generation on a silicon chip using waveguides and resonators

Cited by 47 publications

References 33 publications

Slow light enhanced correlated photon pair generation in photonic-crystal coupled-resonator optical waveguides

Slow light enhanced correlated photon pair generation in photonic-crystal coupled-resonator optical waveguides

A topological source of quantum light

Controlling the spectrum of photons generated on a silicon nanophotonic chip

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