Photonics Research Group Home
Ghent University Journals/Proceedings
About People Research Publications Education Services
 IMEC
intern

 

Publication detail

Authors: T. Van Vaerenbergh, M. Fiers, P. Mechet, T. Spuesens, R. Kumar, G. Morthier, B. Schrauwen, J. Dambre, P. Bienstman
Title: Cascadable Excitability in microrings
Format: International Journal
Publication date: 8/2012
Journal/Conference/Book: Optics Express
Editor/Publisher: OSA, 
Volume(Issue): 20(18) p.20292-20308
DOI: 10.1364/oe.20.020292
Citations: 127 (Dimensions.ai - last update: 3/11/2024)
61 (OpenCitations - last update: 10/5/2024)
Look up on Google Scholar
Download: Download this Publication (3.6MB) (3.6MB)

Abstract

To emulate a spiking neuron, a photonic component needs to be excitable. In this paper, we theoretically simulate and experimentally demonstrate cascadable excitability near a self-pulsation regime in high-Q-factor silicon-on-insulator microrings. For the theoretical study we use Coupled Mode Theory. While neglecting the fast energy and phase dynamics of the cavity light, we can still preserve the most important microring dynamics, by only keeping the temperature difference with the surroundings and the amount of free carriers as dynamical variables of the system. Therefore we can analyse the microring dynamics in a 2D phase portrait. For some wavelengths, when changing the input power, the microring undergoes a subcritical Andronov-Hopf bifurcation at the self-pulsation onset. As a consequence the system shows class II excitability. Experimental single ring excitability and self-pulsation behaviour follows the theoretic predictions. Moreover, simulations and experiments show that this excitation mechanism is cascadable.

Related Research Topics

Related Projects

Citations (OpenCitations)

Back to publication list