Performance of Kerr bistable memory in silicon nitride microring and silica microtoroid

Wataru Yoshiki, Takasumi Tanabe

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We quantitatively analyze the performance of optical memories based on Kerr bistability in microcavites. We model a silicon nitride microring and a silica toroid microcavity, and examine the performances of these cavities in an actual situation where there is a thermo-optic effect. Numerical simulations based on coupled mode theory and the thermal diffusion equation reveal that an input power of 1.8W is necessary to achieve a Kerr bistable memory in a silicon nitride microring, while that of only 1.7mW is necessary in a silica toroid microcavity. This result shows that the use of silica toroid microcavity is advantageous when we want to demonstrate a Kerr bistable memory operation with a reasonably low input power. In addition, we quantitatively investigate the trade-off between the required input power and the response speed of the device.

Original languageEnglish
Article number122202
JournalJapanese journal of applied physics
Issue number12
Publication statusPublished - 2014 Dec 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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