Zero-Power Calibration of Photonic Circuits at Cryogenic Temperatures
Zero-Power Calibration of Photonic Circuits at Cryogenic Temperatures
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DOI：
10.1021/acsphotonics.1c00714
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发表时间：
2021-05
期刊：
影响因子：
7
通讯作者：
Ben M. Burridge;Gerardo E. Villarreal-Garcia;A. Gentile;P. Jiang;J. Barreto
中科院分区：
文献类型：
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作者：
Ben M. Burridge;Gerardo E. Villarreal-Garcia;A. Gentile;P. Jiang;J. Barreto
超导光子探测技术在量子光子学中的不断成功使低温兼容系统成为完全量子光子集成的基石。在这里，我们提出了一种方法来可逆地微调个别波导结构的光学特性，通过局部改变其几何形状，使用固化氙。从本质上讲，我们不需要额外的片上校准元件，有效地将与可重构元件相关的功耗归零，几乎不会损害光子器件的性能。我们能够在压力控制环境中实现无源电路调谐，局部操纵光波导部分上的包层厚度。我们在低温环境中实现了这一点，通过控制氙气的沉积，并使用升华精确调整其厚度，由片上电阻加热器触发。$\pi$相移发生在计算出的长度$L_{\pi}$ = 12.3$\pm$0.3 $\mu m$上。这项工作为将紧凑、可重构的光子电路与超导探测器、设备或其他设备集成在一起铺平了道路。
The continual success of superconducting photon-detection technologies in quantum photonics asserts cryogenic-compatible systems as a cornerstone of full quantum photonic integration. Here, we present a way to reversibly fine-tune the optical properties of individual waveguide structures through local changes to their geometry using solidified xenon. Essentially, we remove the need for additional on-chip calibration elements, effectively zeroing the power consumption tied to reconfigurable elements, with virtually no detriment to photonic device performance. We enable passive circuit tuning in pressure-controlled environments, locally manipulating the cladding thickness over portions of optical waveguides. We realize this in a cryogenic environment, through controlled deposition of xenon gas and precise tuning of its thickness using sublimation, triggered by on-chip resistive heaters. $\pi$ phase shifts occur over a calculated length of just $L_{\pi}$ = 12.3$\pm$0.3 $\mu m$. This work paves the way towards the integration of compact, reconfigurable photonic circuits alongside superconducting detectors, devices, or otherwise.