Spectral Engineering with Coupled Microcavities: Active Control of Resonant Mode-Splitting
Abstract
Optical mode-splitting is an efficient tool to shape and fine-tune the spectral response of resonant nanophotonic devices. The active control of mode-splitting, however, is either small or accompanied by undesired resonance shifts, often much larger than the resonance-splitting. We report a control mechanism that enables reconfigurable and widely tunable mode-splitting while efficiently mitigating undesired resonance shifts. This is achieved by actively controlling the excitation of counter-traveling modes in coupled resonators. The transition from a large splitting (80 GHz) to a single-notch resonance is demonstrated using low power microheaters (35 mW). We show that the spurious resonance-shift in our device is only limited by thermal crosstalk and resonance-shift-free splitting control may be achieved.
Cite
@article{arxiv.1505.07097,
title = {Spectral Engineering with Coupled Microcavities: Active Control of Resonant Mode-Splitting},
author = {Mario C. M. M. Souza and Guilherme Rezende and Luis A. M. Barea and Antonio A. G. von Zuben and Gustavo S. Wiederhecker and Newton C. Frateschi},
journal= {arXiv preprint arXiv:1505.07097},
year = {2023}
}
Comments
4 pages, 3 figures