400%/W second harmonic conversion efficiency in 14 μm-diameter gallium phosphide-on-oxide resonators

Second harmonic conversion from 1550 nm to 775 nm with an efficiency of 400% W is demonstrated in a gallium phosphide (GaP) on oxide integrated photonic platform. The platform consists of doubly-resonant, phase-matched ring resonators with quality factors Q ∼ 10 , low mode volumes V ∼ 30(λ/n) , and...

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Published in:Optics express 2018-12, Vol.26 (26), p.33687-33699
Main Authors: Logan, Alan D, Gould, Michael, Schmidgall, Emma R, Hestroffer, Karine, Lin, Zin, Jin, Weiliang, Majumdar, Arka, Hatami, Fariba, Rodriguez, Alejandro W, Fu, Kai-Mei C
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container_end_page 33699
container_issue 26
container_start_page 33687
container_title Optics express
container_volume 26
creator Logan, Alan D
Gould, Michael
Schmidgall, Emma R
Hestroffer, Karine
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Rodriguez, Alejandro W
Fu, Kai-Mei C
description Second harmonic conversion from 1550 nm to 775 nm with an efficiency of 400% W is demonstrated in a gallium phosphide (GaP) on oxide integrated photonic platform. The platform consists of doubly-resonant, phase-matched ring resonators with quality factors Q ∼ 10 , low mode volumes V ∼ 30(λ/n) , and high nonlinear mode overlaps. Measurements and simulations indicate that conversion efficiencies can be increased by a factor of 20 by improving the waveguide-cavity coupling to achieve critical coupling in current devices.
doi_str_mv 10.1364/OE.26.033687
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title 400%/W second harmonic conversion efficiency in 14 μm-diameter gallium phosphide-on-oxide resonators
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