Non-conventional silicon nitride photonic devices for applications in quantum information

用于量子信息应用的非传统氮化硅光子器件

• 批准号: 2431608
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2431608
• 关键词: Non; conventional; silicon; nitride; photonic

The silicon (Si) platform has supported rapid growth in the development of optical quantum information processing (QIP) on integrated circuits [1] and while it possess many desirable properties such as high optical confinement and transparency at telecom wavelengths, it suffers from unacceptable levels of loss. Silicon nitride (SiN) has been shown to host many of the desirable optical properties that Si offers but it's large bandgap effectively negates any two photon absorption (TPA) at telecom wavelengths resulting in comparatively lower levels of loss [2]. The large Pockels coefficient of barium titanate (BTO) has been shown in [3] to offer high-speed, low power optical modulation in ring resonators when fabricated in conjunction with SiN and if significant non-linear interactions are present in BTO, this could pave the way for high quality, low foot print on-chip sources. If a SiN platform is to be perused, an understanding of its composition could allow further optimisation of its optical properties. Si3N4 is the most stable form but silicon-enriched SiNx has been shown to have enhanced non-linear properties [4]. A comprehensive study into different compositions and the underlying mechanisms behind any non-linear enhancements would aid the development as SiN as a platform for optical QIP.

硅 (Si) 平台支持了集成电路上光量子信息处理 (QIP) 发展的快速增长 [1]，虽然它拥有许多理想的特性，例如电信波长下的高光学限制和透明度，但它的水平却令人无法接受的损失。氮化硅 (SiN) 已被证明具有 Si 所提供的许多理想的光学特性，但它的大带隙有效地消除了电信波长下的任何两个光子吸收 (TPA)，从而导致相对较低的损耗水平 [2]。 [3] 中显示钛酸钡 (BTO) 的大普克尔斯系数可在与 SiN 结合制造时在环形谐振器中提供高速、低功率光学调制，并且如果 BTO 中存在显着的非线性相互作用，这可能为高质量、低占用空间的片上资源铺平了道路。如果要仔细研究 SiN 平台，了解其成分可以进一步优化其光学特性。 Si3N4 是最稳定的形式，但富含硅的 SiNx 已被证明具有增强的非线性特性 [4]。对不同成分和任何非线性增强背后的潜在机制的全面研究将有助于将 SiN 开发为光学 QIP 平台。