We have demonstrated higher-order optical resonance node detection by using an integrated disk microresonator from through port of the coupling bus waveguide. In addition to the fundamental mode, the disk resonator has higher-order whispering gallery modes. The excited second-order higher-order mode has a node at the position where the electromagnetic energy of the fundamental mode is close to a maximum. This high resolution mea surement of optical resonance mode profile has a variety of applications for optical sensing and detection. The self-referencing characteristics of the two optical resonance modes have potential to achieve optical detection independent of external perturbation, such as temperature change.
© 2011 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: May 10, 2011
Revised Manuscript: June 25, 2011
Manuscript Accepted: June 29, 2011
Published: August 5, 2011
M. Ostrowski, P. Pignalosa, H. Smith, and Y. Yi, "Higher-order optical resonance node detection of integrated disk microresonator," Opt. Lett. 36, 3042-3044 (2011)