Photonic crystal slab fabricated on the platform of lithium niobate-on-insulator

Cai, L. Z.; Han, Huijian; Zhang, Shaomei; Hu, Hui; Wang, Ke‐Ming

doi:10.1364/ol.39.002094

Cited by 46 publications

(27 citation statements)

References 19 publications

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“…We have demonstrated 2D LN PhC slab nanoresonators with optical Q up to 3.51 × 10 5 that is about three orders of magnitude higher than other 2D LN PhC nanoresonators reported to date . The high optical Q together with tight optical mode confinement results in intriguing nonlinear optical interactions, allowing us to observe both second‐ and third‐harmonic generation .…”

Section: Discussionmentioning

confidence: 86%

“…The great application potential has attracted significant attention recently to develop LN photonic devices on chip‐scale platforms . However, realizing high‐quality 2D LN PhC structures remains significant challenge, which becomes the major obstacle hindering the exploration of optical phenomena in the nanoscopic scale that would potentially result in intriguing device characteristics and novel functionalities inaccessible by conventional means.…”

Section: Introductionmentioning

confidence: 99%

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High‐Q 2D Lithium Niobate Photonic Crystal Slab Nanoresonators

Liang

Luo

et al. 2019

Laser & Photonics Reviews

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Lithium niobate (LN), known as the “silicon of photonics,” exhibits outstanding material characteristics with great potential for broad applications. Enhancing light–matter interaction on the nanoscale would result in intriguing device characteristics that enable new physical phenomena to be revealed and novel functionalities inaccessible by conventional means to be realized. High‐Q 2D photonic crystal (PhC) slab nanoresonators are particularly suitable for this purpose, which, however, remains an open challenge to be realized on the lithium niobate platform. Here, an important step is taken toward this direction, demonstrating 2D LN PhC slab nanoresonators with optical Q as high as 3.51 × 105, about three orders of magnitude higher than other 2D LN PhC structures reported to date. The high optical quality, tight mode confinement, together with specific polarization characteristics of the devices enable the peculiar anisotropy of photorefraction quenching and unique anisotropic thermo‐optic nonlinear response to be revealed. They also allow the observation of third‐harmonic generation in on‐chip LN nanophotonic devices, and a strong orientation‐dependent generation of the second harmonic.

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Section: Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

High‐Q 2D Lithium Niobate Photonic Crystal Slab Nanoresonators

Liang

Luo

et al. 2019

Laser & Photonics Reviews

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“…The high optical Q, together with tight optical mode confinement, lead to a cavity resonance tuning of ≈0.64 GHz∕aJ, corresponding to ≈84 MHz∕photon, which is caused by the photorefractive effect. Two dimensional photonic crystals have also been fabricated in LNOI and their band structure at C‐band telecommunication wavelengths studied . The inclusion of a defect in a two dimensional photonic crystal can be used to form a cavity and the nonlinear optical properties of such a cavity has been investigated when it was used for SHG .…”

Section: Photonic Building Blocks In Lnoimentioning

confidence: 99%

Status and Potential of Lithium Niobate on Insulator (LNOI) for Photonic Integrated Circuits

Boes

Corcoran

Chang

et al. 2018

Laser & Photonics Reviews

546

290

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Lithium niobate on insulator (LNOI) technology is revolutionizing the lithium niobate industry, enabling higher performance, lower cost and entirely new devices and applications. The availability of LNOI wafers has sparked significant interest in the platform for integrated optical applications, as LNOI offers the attractive material properties of lithium niobate, while also offering the stronger optical confinement and a high optical element integration density that has driven the success of more mature silicon and silicon nitride (SiN) photonics platforms. Due to some similarities between LNOI and SiN, established techniques and standards can readily be adapted to the LNOI platform including a significant array of interface approaches, device designs and also heterogeneous integration techniques for laser sources and photodetectors. In this contribution, we review the latest developments in this platform, examine where further development is necessary to achieve more functionalities in LNOI integrated optical circuits and make a few suggestions of interesting applications that could be realized in this platform.

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“…Compared to the BCB layer, the SiO 2 cladding layer has a lower refractive index and better thermal stability, which allows thermal annealing at much higher temperatures to recover electroand nonlinear optical properties. Recently, the fabrication of threeinch LNOI wafers was reported, and high-quality LNOI photonic wires were developed [7], and photonic crystal was successfully demonstrated [6,8]. For device applications, the LN layer is expected to have similar physical properties as bulk crystal.…”

Section: Introductionmentioning

confidence: 99%