Verified equivalent-circuit model for slot-waveguide modulators

Heiner Zwickel, Stefan Singer, Clemens Kieninger, Yasar Kutuvantavida, Narek Muradyan, Thorsten Wahlbrink, Shiyoshi Yokoyama, Sebastian Randel, Wolfgang Freude, Christian Koos

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


We formulate and experimentally validate an equivalent-circuit model based on distributed elements to describe the electric and electro-optic (EO) properties of travelling-wave silicon-organic hybrid (SOH) slot-waveguide modulators. The model allows to reliably predict the small-signal EO frequency response of the modulators exploiting purely electrical measurements of the frequency-dependent RF transmission characteristics. We experimentally verify the validity of our model, and we formulate design guidelines for an optimum trade-off between optical loss due to free-carrier absorption (FCA), electro-optic bandwidth, and π-voltage of SOH slot-waveguide modulators.

Original languageEnglish
Pages (from-to)12951-12976
Number of pages26
JournalOptics Express
Issue number9
Publication statusPublished - Apr 27 2020

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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