Electrical thermo-optic tuning of ultrahigh-Q microtoroid resonators

Deniz Armani, Bumki Min, Andrea Martin, Kerry J. Vahala
2004 Applied Physics Letters  
The ability to tune resonant frequency in optical microcavities is an essential feature for many applications. Integration of electrical-based tuning as part of the fabrication process has been a key advantage of planar microresonant devices. Until recently, the combination of these features has not been available in devices that operate in the ultrahigh-Q regime where device quality factors ͑Q͒ can exceed 100 million. In this letter, we demonstrate an electrically tunable resonator on a chip
more » ... th ultrahigh-quality factors. Futhermore, the devices have demonstrated tuning rates in excess of 85 GHz/ V 2 and are capable of tuning more than 300 GHz.
doi:10.1063/1.1825069 fatcat:xnwj72hwnbgtjj5j5txunseaqi