title: Broad tuning of whispering-gallery modes in silicon microdisks.
abstract: Silicon microdisks with dynamically-tunable resonance spectra are achieved with nanoscale, in-plane silicon electrical contacts in a single lithographic step. Electrical current is passed through the devices to enable thermal tuning via joule heating. A 14nm wavelength shift is demonstrated with 1.6mW power consumption in devices with >20nm free spectral ranges and quality factors exceeding 20,000. Spectral shifts equal to a full width at half maximum can be achieved with approximately 10microW tuning power for a mode with quality factor of 20,000.
authors.affiliation: Department of Physics and 2Division of Engineering, Brown University, 184 Hope St., Providence, RI 02912, USA. Jeffrey.Shainline@gmail.com
authors.forename: Jeffrey M
authors.initials: JM
authors.lastname: Shainline
authors.forename: Gustavo
authors.initials: G
authors.lastname: Fernandes
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Liu
authors.forename: Jimmy
authors.initials: J
authors.lastname: Xu