Shen Jianhao, Donnelly Daniel, Chakravarty Swapnajit
Opt Lett. 2024 Sep 15;49(18):5179. doi: 10.1364/OL.539479.
The device described in our earlier paper [Opt. Lett.48, 5968 (2023)10.1364/OL.500033] as a slow wave enhanced on-chip Michelson interferometer sensor is correctly designated as a slow wave enhanced on-chip loop terminated Mach-Zehnder interferometer sensor. In the earlier paper, we experimentally demonstrated slow wave enhanced phase and spectral sensitivity in asymmetric loop-terminated Mach-Zehnder interferometer (LT-MZI) sensors. Compared to Mach-Zehnder interferometers (MZI) that experimentally demonstrated a phase sensitivity 84,000 rad/RIU-cm, the reflected path enhancement of the optical path length coupled with slow light enhancement with photonic crystal waveguides in on-chip slow light loop-terminated Mach-Zehnder interferometer sensors resulted in experimentally demonstrated phase sensitivity 277,750 rad/RIU-cm with theoretical phase sensitivity as high as 461,810 rad/RIU-cm, at the same form factor as the MZI of identical interferometer arm lengths.
我们早期论文[《光学快报》48, 5968 (2023) 10.1364/OL.500033]中描述的作为慢波增强型片上迈克尔逊干涉仪传感器的器件，正确地应被指定为慢波增强型片上环形端接马赫-曾德尔干涉仪传感器。在早期论文中，我们通过实验证明了非对称环形端接马赫-曾德尔干涉仪（LT-MZI）传感器中慢波增强的相位和光谱灵敏度。与实验证明相位灵敏度为84,000 rad/RIU-cm的马赫-曾德尔干涉仪（MZI）相比，片上慢光环形端接马赫-曾德尔干涉仪传感器中光程的反射路径增强与光子晶体波导的慢光增强相结合，在与干涉仪臂长相同的MZI相同外形尺寸下，实验证明相位灵敏度为277,750 rad/RIU-cm，理论相位灵敏度高达461,810 rad/RIU-cm。
