title: Tuning of resonance-spacing in a traveling-wave resonator device.
abstract: In this work a traveling-wave resonator device is proposed and experimentally demonstrated in silicon-on-insulator platform in which the spacing between its adjacent resonance modes can be tuned. This is achieved through the tuning of mutual coupling of two strongly coupled resonators. By incorporating metallic microheaters, tuning of the resonance-spacing in a range of 20% of the free-spectral-range (0.4nm) is experimentally demonstrated with 27mW power dissipation in the microheater. To the best of our knowledge this is the first demonstration of the tuning of resonance-spacing in an integrated traveling-wave-resonator. It is also numerically shown that these modes exhibit high field-enhancements which makes this device extremely useful for nonlinear optics and sensing applications.
authors.affiliation: School of Electrical and Computer Engineering, Georgia Institute of Technology, 777 Atlantic Drive NW, Atlanta, GA 30332-0250, USA. atabaki@gatech.edu
authors.forename: Amir H
authors.initials: AH
authors.lastname: Atabaki
authors.forename: Babak
authors.initials: B
authors.lastname: Momeni
authors.forename: Ali A
authors.initials: AA
authors.lastname: Eftekhar
authors.forename: Ehsan S
authors.initials: ES
authors.lastname: Hosseini
authors.forename: Siva
authors.initials: S
authors.lastname: Yegnanarayanan
authors.forename: Ali
authors.initials: A
authors.lastname: Adibi