title: Coupled fiber taper extraction of 1.53 microm photoluminescence from erbium doped silicon nitride photonic crystal cavities.
abstract: Optical fiber tapers are used to collect photoluminescence emission at approximately 1.5 microm from photonic crystal cavities fabricated in erbium doped silicon nitride on silicon. In the experiment, photoluminescence collection via one arm of the fiber taper is enhanced 2.5 times relative to free space collection, corresponding to a net collection efficiency of 4%. Theoretically, the collection efficiency into one arm of the fiber-taper with this material system and cavity design can be as high as 12.5%, but the degradation of the experimental coupling efficiency relative to this value mainly comes from scattering loss within the short taper transition regions. By varying the fiber taper offset from the cavity, a broad tuning range of coupling strength and collection efficiency is obtained. This material system combined with fiber taper collection is promising for building on-chip optical amplifiers.
authors.affiliation: Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA. gshambat@stanford.edu
authors.forename: Gary
authors.initials: G
authors.lastname: Shambat
authors.forename: Yiyang
authors.initials: Y
authors.lastname: Gong
authors.forename: Jesse
authors.initials: J
authors.lastname: Lu
authors.forename: Selçuk
authors.initials: S
authors.lastname: Yerci
authors.forename: Rui
authors.initials: R
authors.lastname: Li
authors.forename: Luca
authors.initials: L
authors.lastname: Dal Negro
authors.forename: Jelena
authors.initials: J
authors.lastname: Vucković
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D004871:Erbium / Q000737:chemistry*; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008029:Lighting / Q000295:instrumentation*; D008163:Luminescent Measurements / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D017655:Silicon Compounds / Q000737:chemistry*
chemical_list: D017655:Silicon Compounds; D004871:Erbium; C032734:silicon nitride