title: Ultra-low power fiber-coupled gallium arsenide photonic crystal cavity electro-optic modulator.
abstract: We demonstrate a gallium arsenide photonic crystal cavity injection-based electro-optic modulator coupled to a fiber taper waveguide. The fiber taper serves as a convenient and tunable waveguide for cavity coupling with minimal loss. Localized electrical injection of carriers into the cavity region via a laterally doped p-i-n diode combined with the small mode volume of the cavity enable ultra-low energy modulation at sub-fJ/bit levels. Speeds of up to 1 GHz are demonstrated with photoluminescence lifetime measurements revealing that the ultimate limit goes well into the tens of GHz.
authors.affiliation: Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA. gshambat@stanford.edu
authors.forename: Gary
authors.initials: G
authors.lastname: Shambat
authors.forename: Bryan
authors.initials: B
authors.lastname: Ellis
authors.forename: Marie A
authors.initials: MA
authors.lastname: Mayer
authors.forename: Arka
authors.initials: A
authors.lastname: Majumdar
authors.forename: Eugene E
authors.initials: EE
authors.lastname: Haller
authors.forename: Jelena
authors.initials: J
authors.lastname: Vučković