title: Linewidth narrowing and Purcell enhancement in photonic crystal cavities on an Er-doped silicon nitride platform.
abstract: Light emission at 1.54 microm from an Er-doped amorphous silicon nitride layer coupled to photonic crystal resonators at cryogenic and room temperatures and under varying optical pump powers has been studied. The results demonstrate that small mode volume, high quality factor resonators enhance Er absorption and emission rates at the cavity resonance. Time resolved measurements give 11- to 17-fold Purcell enhancement of spontaneous emission at cryogenic temperatures, and 2.4-fold enhancement at room temperature. Resonances exhibit linewidth narrowing with pump power, signifying absorption bleaching and partial inversion of the Er ions cryogenic temperatures. We estimate that 31% of Er ions are excited at the highest pump power.
authors.affiliation: 1Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA. yiyangg@stanford.edu
authors.forename: Yiyang
authors.initials: Y
authors.lastname: Gong
authors.forename: Maria
authors.initials: M
authors.lastname: Makarova
authors.forename: Selçuk
authors.initials: S
authors.lastname: Yerci
authors.forename: Rui
authors.initials: R
authors.lastname: Li
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Stevens
authors.forename: Burm
authors.initials: B
authors.lastname: Baek
authors.forename: Sae Woo
authors.initials: SW
authors.lastname: Nam
authors.forename: Robert H
authors.initials: RH
authors.lastname: Hadfield
authors.forename: Sander N
authors.initials: SN
authors.lastname: Dorenbos
authors.forename: Val
authors.initials: V
authors.lastname: Zwiller
authors.forename: Jelena
authors.initials: J
authors.lastname: Vuckovic
authors.forename: Luca
authors.initials: L
authors.lastname: Dal Negro