Year: 2015
Type: article
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.
Source: Optics Letters
DOI: 10.1364/ol.40.003332
Authors: Mario C. M. M. Souza, Guilherme F. M. Rezende, Luis A. M. Barea, Antonio A. G. von Zuben, Gustavo S. Wiederhecker, Newton C. Frateschi
Institution: Universidade Estadual de Campinas (UNICAMP)
Language: English
Topic: Photonic and Optical Devices
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Awards: G1046395571, G6713643966, G997796644
OpenAlex ID: W1869716264