Quantum Light Generation Based on GaN Microring toward Fully On-Chip Source

Physical Review Letters, Journal Year: 2024, Volume and Issue: 132(13)

Published: March 29, 2024

An integrated quantum light source is increasingly desirable in large-scale information processing. Despite recent remarkable advances, a new material platform constantly being explored for the fully on-chip integration of generation, active and passive manipulation, detection. Here, first time, we demonstrate gallium nitride (GaN) microring based generation telecom C-band, which has potential toward monolithic source. In our demonstration, GaN free spectral range 330 GHz near-zero anomalous dispersion region over 100 nm. The energy-time entangled photon pair demonstrated with typical raw two-photon interference visibility 95.5±6.5%, further configured to generate heralded single second-order autocorrelation gH(2)(0) 0.045±0.001. Our results pave way developing chip-scale photonic circuit.Received 19 October 2023Revised 12 December 2023Accepted 29 January 2024DOI:https://doi.org/10.1103/PhysRevLett.132.133603© 2024 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasQuantum entanglementSemiconductor opticsQuantum Information, Science & Technology

Language: Английский

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Entangled photon pair generation in an integrated SiC platform

Light Science & Applications, Journal Year: 2024, Volume and Issue: 13(1)

Published: May 9, 2024

Abstract Entanglement plays a vital role in quantum information processing. Owing to its unique material properties, silicon carbide recently emerged as promising candidate for the scalable implementation of advanced processing capabilities. To date, however, only entanglement nuclear spins has been reported carbide, while an entangled photon source, whether it is based on bulk or chip-scale technologies, remained elusive. Here, we report demonstration source integrated platform first time. Specifically, strongly correlated pairs are efficiently generated at telecom C-band wavelength through implementing spontaneous four-wave mixing compact microring resonator 4H-silicon-carbide-on-insulator platform. The maximum coincidence-to-accidental ratio exceeds 600 pump power 0.17 mW, corresponding pair generation rate (9 ± 1) × 10 3 pairs/s. Energy-time created and verified such signal-idler pairs, with two-photon interference fringes exhibiting visibility larger than 99%. heralded single-photon properties also measured, g (2) (0) order −3 , demonstrating SiC prospective fully integrated, complementary metal-oxide-semiconductor compatible applications.

Language: Английский

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Ultralow-Loss Integrated Photonics Enables Bright, Narrowband, Photon-Pair Sources

Physical Review Letters, Journal Year: 2024, Volume and Issue: 133(8)

Published: Aug. 22, 2024

Photon-pair sources are critical building blocks for photonic quantum systems. Leveraging Kerr nonlinearity and cavity-enhanced spontaneous four-wave mixing, chip-scale photon-pair can be created using microresonators built on integrated circuit. For practical applications, a high microresonator quality factor Q is mandatory to magnify sources' brightness reduce their linewidth. The former proportional Q^{4}, while the latter inversely Q. Here, we demonstrate an integrated, microresonator-based, narrowband source. microresonator, made of silicon nitride fabricated standard CMOS foundry process, features ultralow loss down 0.03 dB/cm intrinsic exceeding 10^{7}. source has 1.17×10^{9} Hz/mW^{2}/GHz linewidth 25.9 MHz, both which record values silicon-photonics-based light It further enables heralded single-photon with second-order correlation g_{h}^{(2)}(0)=0.0037(5), as well energy-time entanglement raw visibility 0.973(9). Our work evidences global potential ultralow-loss photonics create novel circuits, catalyzing efficient, compact, robust interfaces communication networks.

Language: Английский

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Interdisciplinary advances in microcombs: bridging physics and information technology

eLight, Journal Year: 2024, Volume and Issue: 4(1)

Published: Oct. 10, 2024

Abstract The advancement of microcomb sources, which serve as a versatile and powerful platform for various time–frequency measurements, have spurred widespread interest across disciplines. Their uses span coherent optical microwave communications, atomic clocks, high-precision LiDARs, spectrometers, frequency synthesizers. Recent breakthroughs in fabricating micro-cavities, along with the excitation control microcombs, broadened their applications, bridging gap between physical exploration practical engineering systems. These developments pave way pioneering approaches both classical quantum information sciences. In this review article, we conduct thorough examination latest strategies related to enhancement functionalization schemes, cutting-edge applications that cover signal generation, data transmission, analysis, gathering, processing computation. Additionally, provide in-depth evaluations microcomb-based methodologies tailored variety applications. To conclude, consider current state research suggest prospective roadmap could transition technology from laboratory settings broader real-world

Language: Английский

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Polarization-entangled quantum frequency comb from a silicon nitride microring resonator

Physical Review Applied, Journal Year: 2023, Volume and Issue: 20(6)

Published: Dec. 18, 2023

Integrated microresonator facilitates the realization of quantum frequency comb (QFC), which provides a large number discrete modes with broadband spectral range and narrow linewidth. However, all previous demonstrations have focused on generation energy-time or time-bin entangled photons from QFC. Realizing polarization-entangled comb, is useful resource for fundamental study mechanics information applications, remains challenging. Here, we demonstrate by combining an integrated silicon-nitride Sagnac interferometer. With free about 99 GHz linewidth 190 MHz, our source 22 photon pairs covering whole telecom C-band. The entanglement fidelities are above 81%, including 17 higher than 90%. Our demonstration paves way employing in network using CMOS technology as well standard dense wavelength division-multiplexing technology.

Language: Английский

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Generation of two-channel intensity difference squeezing by using a single fiber-optical parametric amplifier

Optical Fiber Technology, Journal Year: 2025, Volume and Issue: 91, P. 104160 - 104160

Published: Feb. 8, 2025

Language: Английский

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Down-converted photon pairs in a high-Q silicon nitride microresonator

Nature, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

Abstract Entangled photon pairs from spontaneous parametric down-conversion (SPDC) 1 are central to many quantum applications 2–6 . SPDC is typically performed in non-centrosymmetric systems 7 with an inherent second-order nonlinearity ( χ (2) ) 8–10 We demonstrate strong narrowband on-chip rate of 0.8 million per second Si 3 N 4 the pre-eminent material for photonic integration and also exhibits lowest waveguide loss (which essential integrated circuits). However, being amorphous, silicon nitride lacks intrinsic , which limits its role devices. enabled by combining light-field enhancement inside a high optical Q -factor microcavity optically induced space-charge field. present spectral brightness. The nature down-converted verified through coincidence measurements. This light source, based on photonics technology, unlocks new avenues chip.

Language: Английский

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Quantum light sources with configurable lifetime leveraging parity-time symmetry

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Quantum light sources with configurable photon lifetimes are essential for large-scale quantum circuits, enabling applications in programmable computing, various key distribution protocols, and tomography techniques. However, the fundamental trade-off between efficiency lifetime imposes significant challenges on design of high-performance large sources. Here, we report such chip-scale by harnessing unique feature parity-time (PT) symmetry. The core centers employing PT-symmetric coupling two microresonators distinct circumferences, broad-range selective tuning intracavity density states. By controlling alignment resonators, achieved a 38-fold range (4 ~ 158 ps), shortest near exceptional points systems. device generates energy-time entangled pairs 87.1 ± 1.1% interference visibility heralded second-order autocorrelation 𝑔_ℎ⁽²⁾(0)= 35 0.069 0.001. Our work highlights potential PT symmetry advanced applications, including high-speed communication coherent tomography, beyond.

Language: Английский

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Quantum entanglement network enabled by a state-multiplexing quantum light source

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: May 12, 2025

Abstract A fully connected quantum network with a wavelength division multiplexing architecture plays an increasingly pivotal role in information technology. With such architecture, entanglement-based has been demonstrated which entangled photon-pair source distributes entanglement resources to many users. Despite these remarkable advances, the scalability of could be constrained by finite spectrum resource, where $${\mathscr{O}}\left({N}^{2}\right)$$ O N 2 channels are needed connect N users, thus impeding further progress real-world scenarios. Here, we propose scheme for using state-multiplexing light source. dual-pump configuration, feasibility our approach is generating photon pairs at multiple silicon nitride microring resonator chip. In demonstration, establish graph between four users six channels—saving half without sacrificing functionality and performance secure communication. total asymptotic key rate 1946.9 bps obtained performing BBM92 protocol distributed state. The topology method great potential developing scalable significantly minimized infrastructure requirements.

Language: Английский

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超低损耗氮化硅集成光学：非线性光学和应用（特邀）

Acta Optica Sinica, Journal Year: 2024, Volume and Issue: 44(15), P. 1513018 - 1513018

Published: Jan. 1, 2024

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