Generation of hyper-entanglement on polarization and energy-time based on a silicon micro-ring cavity

Suo, Jing; Dong, Shuai; Zhang, Wei; Peng, Jiangde

doi:10.1364/oe.23.003985

Cited by 46 publications

(41 citation statements)

References 19 publications

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“…The generated photon pair is expected to demonstrate energy-time entanglement which can be investigated through a Franson-type two-photon interference experiment, by violating Bell's inequality 25,26 . Such measurements have already been shown for several silicon photonic pair-generation devices 19,[27][28][29][30][31] , and high values of visibility are confirmed for the microring device measured here. Fig.…”

Section: Energy-time Entanglementsupporting

confidence: 86%

Silicon photonic entangled photon-pair and heralded single photon generation with CAR > 12,000 and g^(2)(0) < 0006

et al. 2017

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We report measurements of time-frequency entangled photon pairs and heralded single photons at 1550 nm wavelengths generated using a microring resonator pumped optically by a diode laser. Along with a high spectral brightness of pair generation, the conventional metrics used to describe performance, such as Coincidences-to-Accidentals Ratio (CAR), conditional self-correlation [g (2) (0)], two-photon energy-time Franson interferometric visibility etc. are shown to reach a highperformance regime not yet achieved by silicon photonics, and attained previously only by crystal, glass and fiber-based pair-generation devices.

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Section: Energy-time Entanglementsupporting

confidence: 86%

Silicon photonic entangled photon-pair and heralded single photon generation with CAR > 12,000 and g^(2)(0) < 0006

et al. 2017

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“…Additionally, loss figures of merit are low and we have proposed a strategy for further optimization. Although, here only energy-time entanglement has been revealed in a postselection-free fashion, we note that our source actually generates photon pairs which are hyperentangled in the polarisation and energytime observables [16,50]. This makes our scheme interesting for high-dimensional quantum key distribution schemes, potentially combined with dense wavelength division multiplexing strategies towards realising high bit rate systems [5,23,24,25].…”

Section: Resultsmentioning

confidence: 86%

“…There is a large variety of polarisation entanglement sources taking advantage of guidedwave photonics. Polarisation entangled photon pairs can be generated through fourwave mixing in silicon ring resonators [16] or birefringent fibres [17,18,19]. Here, the corresponding emission bandwidth is usually relatively narrow which compromises the source versatility.…”

Section: State Of the Art Guided-wave Polarisation Entangled Photon Pmentioning

confidence: 99%

Fully guided-wave photon pair source for quantum applications

Vergyris

Kaiser

Gouzien

et al. 2017

Quantum Sci. Technol.

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We report a fully guided-wave source of polarisation entangled photons based on a periodically poled lithium niobate waveguide mounted in a Sagnac interferometer. We demonstrate the source's quality by converting polarisation entanglement to postselection-free energy-time entanglement for which we obtain a near-optimal S-parameter of 2.75 ± 0.02, i.e. a violation of the Bell inequality by more than 35 standard deviations. The exclusive use of guided-wave components makes our source compact and stable which is a prerequisite for increasingly complex quantum applications. Additionally, our source offers a great versatility in terms of photon pair emission spectrum and generated quantum state, making it suitable for a broad range of quantum applications such as cryptography and metrology. In this sense, we show how to use our source for chromatic dispersion measurements in optical fibres which opens new avenues in the field of quantum metrology.

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“…1a) and the spectral filtering ensured by the bandpass filters in each arm, the rate at the output of the chip is 4 times higher, i.e about 480 pairs generated per second for each channel pair. Let us stress that this coincidence rate, stands among the best values reported for photonic devices embedding several key components [7,20,[34][35][36][37][38]. In comparison, similar realizations suf- fer from low coincidence rates due to prohibitive losses, precluding any further analysis of entanglement [19,20].…”

Section: Photonic Device and Classical Measurementsmentioning

confidence: 98%

High-quality photonic entanglement out of a stand-alone silicon chip

et al. 2020

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The fruitful association of quantum and integrated photonics holds the promise to produce, manipulate, and detect quantum states of light using compact and scalable systems. Integrating all the building-blocks necessary to produce high-quality photonic entanglement in the telecom wavelength range out of a single chip remains a major challenge, mainly due to the limited performance of on-chip light rejection filters. We report a stand-alone, telecom-compliant, device that integrates, on a single substrate, a nonlinear photon-pair generator and a passive pump rejection filter. Using standard channel-grid fiber demultiplexers, we demonstrate the first entanglement qualification of such a integrated circuit, showing the highest raw quantum interference visibility for time-energy entangled photons over two telecom-wavelength bands. Genuinely pure maximally entangled states can therefore be generated thanks to the high-level of noise suppression obtained with the pump filter. These results will certainly further promote the development of more advanced and scalable photonic-integrated quantum systems compliant with telecommunication standards.Quantum information science (QIS) exploits the fundamental properties of quantum physics to code and manipulate quantum states. QIS is regarded as the most promising pathway towards disruptive technologies, envisioning major improvements in processing capabilities and communication security [1,2]. However, practical implementations, such as quantum key distribution systems or quantum processors, require a large amount of compatible building-blocks [3][4][5][6]. Integrated photonics provides efficient and reliable solutions for realizing advanced quantum communication systems based on both linear and nonlinear elements [7][8][9][10][11][12][13]. Still, all these realizations face a crucial limitation as soon as on-chip suppression of photonic noise is concerned due to the substantially higher pump intensity compared to that of the photon-pairs. Most of the time, this operation is externalized, using fiber or bulk optical components, and hinders the benefit of both the compactness and stability of the whole system [14].CMOS-compatible technologies hold the promise of bringing quantum photonics one step further with optical circuits showing higher integration levels [15]. A few experiments based on this technology have been carried out to address the pump rejection challenge using on-chip solutions [16][17][18][19][20][21][22]. On-chip pump rejection has been demonstrated based on a semiconductor quantum dot integrated in a CMOS photonic circuit, but emitting out of the telecom range. The other strategies suffer from two main limitations: i) the continuous monitoring of the filter response to maintain proper performance [16][17][18], and ii) prohibitive additional interconnection losses between components [19, 20] (up to 9 dB[21]). Moreover, all these solutions have reported temporal correlation measurements for revealing the degree of indistinguishability * laurent.labonte@univ-cote...

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Generation of hyper-entanglement on polarization and energy-time based on a silicon micro-ring cavity

Cited by 46 publications

References 19 publications

Silicon photonic entangled photon-pair and heralded single photon generation with CAR > 12,000 and g^(2)(0) < 0006

Silicon photonic entangled photon-pair and heralded single photon generation with CAR > 12,000 and g^(2)(0) < 0006

Fully guided-wave photon pair source for quantum applications

High-quality photonic entanglement out of a stand-alone silicon chip

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