碳化硅中双波长偏振选择性超透镜的制备
Engineering of Dual Wavelength, Polarization Selective Metalenses in Silicon Carbide
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中文总结 AI 辅助
本研究制备了可同时工作于860 nm和1240 nm的SiC单片超透镜，实现了光收集与偏振操控，可用于两种缺陷的同时光探测磁共振，为集成SiC光子器件提供紧凑光学接口。
中文摘要 AI 辅助
碳化硅（SiC）中的自旋缺陷是集成量子光子学的有前景候选材料，其具有长寿命自旋态和近红外发射特性，适用于低损耗光子集成及基于光纤的量子通信。然而，由于SiC的折射率相对较高，从这些缺陷中提取光仍具挑战性。超透镜提供了一种紧凑的方法，可通过直接在材料界面处调控波前来增强光收集。本研究设计并制备了由SiC块体材料构成的单片超透镜，其可同时在860 nm和1240 nm波长下工作，与氮空位和硅空位色心的发射相匹配。通过独立调控两个波长下的相位响应，该超透镜可实现对发射光的收集与偏振操控。研究进一步利用该超透镜演示了两种缺陷的同时光探测磁共振。这些多功能超透镜为可扩展的集成SiC光子器件提供了紧凑的光学接口。
英文摘要
Spin defects in silicon carbide (SiC) are promising candidates for integrated quantum photonics, offering long-lived spin states and near-infrared emission suitable for low-loss photonic integration and fibre-based quantum communication. However, light extraction from these defects remains challenging due the relatively high refractive index of SiC. Metalenses offer a compact approach to enhance light collection by engineering the wavefront directly at the material interface. Here, we design and fabricate monolithic metalenses from SiC bulk material that simultaneously operate at 860 and 1240 nm, matching with emission from the nitrogen vacancy and silicon vacancy colour centers. By independently engineering the phase response at both wavelengths, the metalens enables collection and polarization manipulation of the emitted light. We further employ the metalenses to demonstrate optically detected magnetic resonance of both defects simultaneously. These multifunctional metalenses provide a compact optical interface for scalable integrated SiC photonic devices.
