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arXiv 2104.08262physics.opticsquant-ph
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色散工程纳米光子晶体锂光波导中的强光参量放大

Intense optical parametric amplification in dispersion engineered nanophotonic lithium niobate waveguides

Luis Ledezma, Ryoto Sekine, Qiushi Guo, Rajveer Nehra, Saman Jahani, Alireza Marandi

摘要:

集成光子学中的强放大是计算、通信、传感和量子信息处理最期望的光学功能之一。半导体增益和立方非线性,如四波混频和受激拉曼和布里渊散射,已经成为芯片上研究最多的放大机制之一。或者,具有强二次非线性的材料平台在增益和带宽方面具有许多优势,其中纳米光子锂离子材料是最有前途的候选材料之一。在这里,我们将准相位匹配与色散工程相结合,在纳米光子晶体锂酸盐波导中实现了强烈的光参量放大。我们测量了一个宽带相敏片上放大大于45 dB/cm的2.5毫米长的波导。我们进一步确认高增益操作的退化和非退化制度,通过放大真空波动的宏观水平在6毫米长的波导,与片上增益超过100 dB/cm的600 nm的带宽约2 $μ$ m。我们的研究结果为片上少周期非线性光学、中红外光子学和量子光子学开启了新的可能性。

英文摘要:

Strong amplification in integrated photonics is one of the most desired optical functionalities for computing, communications, sensing, and quantum information processing. Semiconductor gain and cubic nonlinearities, such as four-wave mixing and stimulated Raman and Brillouin scattering, have been among the most studied amplification mechanisms on chip. Alternatively, material platforms with strong quadratic nonlinearities promise numerous advantages with respect to gain and bandwidth, among which nanophotonic lithium niobate is one of the most promising candidates. Here, we combine quasi-phase matching with dispersion engineering in nanophotonic lithium niobate waveguides and achieve intense optical parametric amplification. We measure a broadband phase-sensitive on-chip amplification larger than 45 dB/cm in a 2.5-mm-long waveguide. We further confirm high gain operation in the degenerate and non-degenerate regimes by amplifying vacuum fluctuations to macroscopic levels in a 6-mm-long waveguide, with on-chip gains exceeding 100 dB/cm over 600 nm of bandwidth around 2 $μ$m. Our results unlock new possibilities for on-chip few-cycle nonlinear optics, mid-infrared photonics, and quantum photonics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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