Integrated Photonic Platform for Rare-Earth Ions in Thin Film Lithium Niobate
Integrated Photonic Platform for Rare-Earth Ions in Thin Film Lithium Niobate
复制标题
稀土离子在铌酸锂薄膜中的集成光子平台
DOI：
10.1021/acs.nanolett.9b04679
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发表时间：
2020-01-01
期刊：
影响因子：
10.8
通讯作者：
Waks, Edo
中科院分区：
文献类型：
--
作者：
Dutta, Subhojit;Goldschmidt, Elizabeth A.;Waks, Edo
掺杂在单晶中的稀土离子系综是一种很有前途的材料体系，在光信号处理、激光和量子信息处理等领域有着广泛的应用。将稀土离子注入集成光子器件可以实现紧凑的激光器和调制器，以及用于经典和量子光学应用的片上光量子存储器。为此，与集成光子器件的平面制造兼容的薄膜单晶晶片结构将是高度期望的。然而，将稀土离子结合到薄膜形状因子中，同时保持其光学特性已被证明具有挑战性。我们展示了一个集成的光子平台，用于在绝缘体上的单晶薄膜锂离子掺杂的稀土离子。该薄膜由掺杂有Tm3+的锂离子电池组成。在薄膜中的离子表现出相同的光学寿命在散装晶体中测量。我们在薄膜波导中显示了窄光谱孔，其需要比先前报道的体波导低2个数量级的功率来产生。我们的研究结果为可扩展的片上激光器，光信号处理设备和集成光量子存储器铺平了道路。
Rare-earth ion ensembles doped in single crystals are a promising materials system with widespread applications in optical signal processing, lasing, and quantum information processing. Incorporating rare-earth ions into integrated photonic devices could enable compact lasers and modulators, as well as on-chip optical quantum memories for classical and quantum optical applications. To this end, a thin film single crystalline wafer structure that is compatible with planar fabrication of integrated photonic devices would be highly desirable. However, incorporating rare-earth ions into a thin film form-factor while preserving their optical properties has proven challenging. We demonstrate an integrated photonic platform for rare-earth ions doped in a single crystalline thin film lithium niobate on insulator. The thin film is composed of lithium niobate doped with Tm3+. The ions in the thin film exhibit optical lifetimes identical to those measured in bulk crystals. We show narrow spectral holes in a thin film waveguide that require up to 2 orders of magnitude lower power to generate than previously reported bulk waveguides. Our results pave the way for scalable on-chip lasers, optical signal processing devices, and integrated optical quantum memories.