title: Second harmonic generation in gallium phosphide photonic crystal nanocavities with ultralow continuous wave pump power.
abstract: We demonstrate second harmonic generation in photonic crystal nanocavities fabricated in the semiconductor gallium phosphide. We observe second harmonic radiation at 750 nm with input powers of only nanowatts coupled to the cavity and conversion effciency P(out)/P(2)(in,coupled)=430%/W. The large electronic band gap of GaP minimizes absorption loss, allowing effcient conversion. Our results are promising for integrated, low-power light sources and on-chip reduction of input power in other nonlinear processes.
authors.affiliation: E. L. Ginzton Laboratory, Stanford University, Stanford, CA 94305-4085, USA. krivoire@stanford.edu
authors.forename: Kelley
authors.initials: K
authors.lastname: Rivoire
authors.forename: Ziliang
authors.initials: Z
authors.lastname: Lin
authors.forename: Fariba
authors.initials: F
authors.lastname: Hatami
authors.forename: W Ted
authors.initials: WT
authors.lastname: Masselink
authors.forename: Jelena
authors.initials: J
authors.lastname: Vucković
mesh_terms: D017076:Computer-Aided Design; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000737:chemistry*; D007834:Lasers; D008029:Lighting / Q000295:instrumentation*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D010316:Particle Size; D010720:Phosphines / Q000737:chemistry*
chemical_list: D010720:Phosphines; C485338:gallium phosphide; D005708:Gallium