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Second harmonic generation in gallium phosphide photonic crystal nanocavities with ultralow continuous wave pump power

2009; Optica Publishing Group; Volume: 17; Issue: 25 Linguagem: Inglês

10.1364/oe.17.022609

1094-4087

Kelley Rivoire, Ziliang Lin, Fariba Hatami, W. T. Masselink, Jelena Vučković,

Advanced Fiber Laser Technologies

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 efficiency Pout/P 2 in,coupled = 430%/W.The large electronic band gap of GaP minimizes absorption loss, allowing efficient conversion.Our results are promising for integrated, low-power light sources and on-chip reduction of input power in other nonlinear processes.