We demonstrate record performance of series-coupled silicon racetrack resonators exhibiting the Vernier effect. Our device has an interstitial peak suppression (IPS) of 25.5 dB, which is 14.5 dB larger than previously reported results. We also demonstrate the relationship between the inter-ring gap distance and the IPS as well as the 3 dB bandwidth (BW) both theoretically and experimentally. Namely, we show that as the inter-ring gap distance increases, the IPS increases and the 3 dB BW decreases.
© 2012 Optical Society of America
Original Manuscript: September 25, 2012
Revised Manuscript: November 20, 2012
Manuscript Accepted: November 20, 2012
Published: December 12, 2012
Robert Boeck, Jonas Flueckiger, Han Yun, Lukas Chrostowski, and Nicolas A. F. Jaeger, "High performance Vernier racetrack resonators," Opt. Lett. 37, 5199-5201 (2012)