Photonic link from single-flux-quantum circuits to room temperature

Nature Photonics, Journal Year: 2024, Volume and Issue: 18(4), P. 371 - 378

Published: Jan. 16, 2024

Language: Английский

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Fabrication and photonic applications of Si-integrated LiNbO3 and BaTiO3 ferroelectric thin films

APL Materials, Journal Year: 2024, Volume and Issue: 12(2)

Published: Feb. 1, 2024

Silicon, renowned for its applications in electronic circuits, also offers significant advantages the realm of integrated optics. While silicon does have inherent limitations fabricating active devices, these challenges can be overcome through heterogeneous integration with other materials. Ferroelectric materials like lithium niobate (LN) and barium titanate (BTO) exhibit exceptional electrical nonlinear optical properties, making them ideal candidates photonics. Over past few decades, LN platform has made substantial progress, surmounting obstacles such as manufacturing difficulties, high waveguide losses, low modulation bandwidth caused by wide electrode spacing. Consequently, LN-based devices found widespread application various fields. With advent high-quality, large-size on insulator wafers, photonics become a burgeoning research area. At same time, ferroelectric material BTO, tremendous electro-optic response, shows promise next generation Recent studies highlighted remarkable performance BTO-based modulators, which offer smaller device sizes compared to achieving lower half-wave voltages. This comprehensive review presents fabrication methods integrating BTO thin films silicon, focusing recent advancements. We discuss their responses provide an overview diverse enabled platforms. Finally, we summarize current state insights into future directions.

Language: Английский

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Programmable multifunctional integrated microwave photonic circuit on thin-film lithium niobate

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: March 7, 2025

Language: Английский

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III/V-on-lithium niobate amplifiers and lasers

Optica, Journal Year: 2021, Volume and Issue: 8(10), P. 1288 - 1288

Published: Aug. 27, 2021

We demonstrate electrically pumped, heterogeneously integrated lasers on thin-film lithium niobate, featuring electro-optic wavelength tunability.

Language: Английский

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Lithium Niobate Meta-Optics

ACS Photonics, Journal Year: 2022, Volume and Issue: 9(12), P. 3745 - 3763

Published: Nov. 9, 2022

The rapid development of optical metasurfaces, 2D ensembles engineered nanostructures, is presently underpinning a steady drive toward the miniaturization many functionalities and devices. list material platforms for metasurfaces rapidly expanding as, over past few years, we have witnessed surge in establishing meta-optical elements from high-index, highly transparent materials with strong nonlinear electro-optic properties. In particular, crystalline lithium niobate (LiNbO3), already prime integrated photonics, has shown great promise novel components, thanks to its large electro-optical coefficient second-order response broad transparency window ranging visible mid-infrared. Recent advances nanofabrication technology indeed marked new milestone LiNbO3 platforms, hence enabling first demonstrations LiNbO3-based metasurfaces. These seminal works set steppingstone realization ultrathin monolithic light sources, efficient quantum sources correlated photon pairs, as well modulators. Here, review these recent by providing perspective on their potential applications examining possible setbacks limitations emerging technologies.

Language: Английский

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Devices and Fibers for Ultrawideband Optical Communications

Proceedings of the IEEE, Journal Year: 2022, Volume and Issue: 110(11), P. 1742 - 1759

Published: Sept. 21, 2022

Wavelength-division multiplexing (WDM) has historically enabled the increase in capacity of optical systems by progressively populating existing bandwidth erbium-doped fiber amplifiers (EDFAs) $C$ -band. Nowadays, number channels—needed systems—is approaching maximum standard -band EDFAs. As a result, industry worked on novel approaches, such as use multicore fibers, extension available spectrum EDFAs, and development transmission covering - notation="LaTeX">$L$ -bands beyond. In context continuous traffic growth, ultrawideband (UWB) WDM appear promising technology to leverage already deployed infrastructure sustain demand for years come. Since pioneering demonstrations UWB few ago, long strides have been taken toward technologies. this review article, we discuss how most recent advances design fabrication enabling devices, lasers, amplifiers, switches, modulators, improved performance systems, paving way turn research into future products. addition, also report recently introduced nested antiresonant nodeless fibers (NANFs), whose implementations could potentially provide up 300-nm-wide at less than 0.2 dB/km loss.

Language: Английский

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Spectral control of nonclassical light pulses using an integrated thin-film lithium niobate modulator

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: Nov. 17, 2022

Abstract Manipulating the frequency and bandwidth of nonclassical light is essential for implementing frequency-encoded/multiplexed quantum computation, communication, networking protocols, bridging spectral mismatch among various systems. However, control requires a strong nonlinearity mediated by light, microwave, or acoustics, which challenging to realize with high efficiency, low noise, on an integrated chip. Here, we demonstrate both shifting compression heralded single-photon pulses using thin-film lithium niobate (TFLN) phase modulator. We achieve record-high electro-optic shearing telecom single photons over terahertz range (±641 GHz ±5.2 nm), enabling visibility interference between frequency-nondegenerate photon pairs. further operate modulator as time lens eighteen-fold (6.55 nm 0.35 nm) photons. Our results showcase viability promise on-chip scalable photonic information processing.

Language: Английский

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All-optical ultrafast ReLU function for energy-efficient nanophotonic deep learning

Nanophotonics, Journal Year: 2022, Volume and Issue: 12(5), P. 847 - 855

Published: May 2, 2022

In recent years, the computational demands of deep learning applications have necessitated introduction energy-efficient hardware accelerators. Optical neural networks are a promising option; however, thus far they been largely limited by lack nonlinear optical functions. Here, we experimentally demonstrate an all-optical Rectified Linear Unit (ReLU), which is most widely used activation function for learning, using periodically-poled thin-film lithium niobate nanophotonic waveguide and achieve ultra-low energies in regime femtojoules per with near-instantaneous operation. Our results provide clear practical path towards truly all-optical, learning.

Language: Английский

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Heterogeneous integration of III–V semiconductor lasers on thin-film lithium niobite platform by wafer bonding

Applied Physics Letters, Journal Year: 2023, Volume and Issue: 122(8)

Published: Feb. 20, 2023

Thin-film lithium niobate (TFLN) photonic integrated circuits (PICs) have emerged as a promising photonics platform for the optical communication, microwave photonics, and sensing applications. In recent years, rapid progress has been made on development of low-loss TFLN waveguides, high-speed modulators, various passive components. However, integration laser sources is still one main hurdles in path toward fully PICs. Here, we present heterogeneous InP-based semiconductor lasers PIC. The III–V epitaxial layer stack adhesively bonded to waveguide circuit. device, light coupled from gain section via multi-section spot size converter. A waveguide-coupled output power above 1 mW achieved device operating at room temperature. This approach can also be used realize on-chip photodetectors based same process flow, thereby enabling large-volume, low-cost manufacturing III–V-on-lithium systems next-generation high-capacity communication

Language: Английский

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Redeposition-free inductively-coupled plasma etching of lithium niobate for integrated photonics

Nanophotonics, Journal Year: 2023, Volume and Issue: 12(8), P. 1601 - 1611

Published: Jan. 14, 2023

Abstract Lithium niobate on insulator is being established as a versatile platform for new generation of photonic integrated devices. Extensive progress has been made in recent years to improve the fabrication optical circuits from research towards wafer-scale commercial foundries, and losses have reached remarkably low values approaching material limits. In this context, argon etching lithium waveguides shown provide best quality, yet process still challenging optimise due its physical nature. Namely, micro-masking effects introduced by redeposition close one etch mask selectivity deep etches. We present workflow identify parameter set offering results independent plasma system used. show how reach redeposition-free regime propose three methods achieve with good quality sidewalls without need wet chemistry cleaning.

Language: Английский

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