Real- time imaging of standing- wave patterns in microresonators

• 成果类型: Article
• 署名作者: Yan, Haochen; Ghosh, Alekhya; Pal, Arghadeep; Zhang, Hao; Bi, Toby; Ghalanos, George; Zhang, Shuangyou; Hill, Lewis; Zhang, Yaojing; Zhuang, Yongyong; Xavier, Jolly; Del'Haye, Pascal
• 署名单位: Max Planck Society; University of Erlangen Nuremberg; University of Strathclyde; Xi'an Jiaotong University; Xi'an Jiaotong University; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Delhi
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-13512
• DOI: 10.1073/pnas.2313981121
• 发表日期: 2024-03-05
• 关键词: generation; emission; DYNAMICS

摘要

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 bidirectional 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 broad avenues for applications in on - chip near - field (bio) sensing, real - time characterization of photonic integrated circuits, and backscattering control in telecom systems.