Main > HPArticle > A controllable coupling structure for silicon microring resonators based on adiabatic elimination
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  • Manuscript Accepted: Nov. 6, 2019

    Online Published: Nov. 25, 2019

Chinese Optics Letters, 2020, Vol. 18, Issue 1, pp.

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

Yang Fenghe, Sun Pengfei, Chen Ruixuan, Zhou Zhiping

Author Affiliations

  • Peking University
  • Peking University
  • Peking University
  • Peking University

Abstract

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 microring resonator is necessary in many scenarios, but modifications are essentially added to the resonator and impairs 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 detailedly 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 resonator-waveguide system feasible.

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