A controllable coupling structure for silicon microring resonators based on adiabatic elimination

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2020,（1）
• 页码范围: 110-114
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL202018.013601

摘要

Optical microring resonators are extensively employed in a wide range of physical studies and applications due to the resonance enhancement property.Incorporating coupling control of a microring resonator is necessary in many scenarios,but modifications are essentially added to the resonator and impair the capability of optical enhancement.Here,we propose a flexible coupling structure based on adiabatic elimination that allows low-loss active coupling control without any modifications to the resonators.The self-coupling coefficient can be monotonically or non-monotonically controllable by the proposed coupler,potentially at a high speed.The characteristic of the coupler when implemented in silicon microring resonators is investigated in detail using substantiated analytical theory and experiments.This work provides a general method in coupling control while ensuring the resonance enhancement property,making active coupling control in a resonator-waveguide system feasible.