Real-time imaging of standing-wave patterns in microresonators

Real-time characterization of microresonator dynamics is important for many applications. In particular it is critical for near-field sensing and understanding light-matter interactions. Here, we report camera-facilitated imaging and analysis of standing wave patterns in optical ring resonators. The...

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Bibliographic Details
Published in:arXiv.org 2024-01
Main Authors: Haochen Yan, Ghosh, Alekhya, Pal, Arghadeep, Zhang, Hao, Bi, Toby, Ghalanos, George, Zhang, Shuangyou, Hill, Lewis, Zhang, Yaojing, Zhuang, Yongyong, Jolly, Xavier, DelHaye, Pascal
Format: Article
Language:English
Subjects:
Cameras
Distance measurement
Infrared cameras
Integrated circuits
Near fields
Real time
Resonators
Scattering
Short wave radiation
Standing waves
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Summary:Real-time characterization of microresonator dynamics is important for many applications. In particular it is critical for near-field sensing and understanding light-matter interactions. Here, we report camera-facilitated imaging and analysis of standing wave patterns in optical ring resonators. The standing wave pattern is generated through bi-directional pumping of a microresonator and the scattered light from the microresonator is collected by a short-wave infrared (SWIR) camera. The recorded scattering patterns are wavelength dependent, and the scattered intensity exhibits a linear relation with the circulating power within the microresonator. By modulating the relative phase between the two pump waves, we can control the generated standing waves movements and characterize the resonator with the SWIR camera. The visualized standing wave enables subwavelength distance measurements of scattering targets with nanometer-level accuracy. This work opens new avenues for applications in on-chip near-field (bio-)sensing, real time characterization of photonic integrated circuits and backscattering control in telecom systems.
ISSN:2331-8422
DOI:10.48550/arxiv.2401.07670