title: Photonic crystal cavity-assisted upconversion infrared photodetector.
abstract: We describe an upconversion infrared photodetector assisted by a gallium phosphide photonic crystal nanocavity directly coupled to a silicon photodiode. The strongly cavity-enhanced second harmonic signal radiating from the gallium phosphide membrane can thus be efficiently collected by the silicon photodiode, which promises a high photoresponsivity of the upconversion detector as 0.81 A/W with the coupled power of 1W. The integrated upconversion photodetector also functions as a compact autocorrelator with sub-ps resolution for measuring pulse width and chirp.
authors.forename: Xuetao
authors.initials: X
authors.lastname: Gan
authors.forename: Xinwen
authors.initials: X
authors.lastname: Yao
authors.forename: Ren-Jye
authors.initials: RJ
authors.lastname: Shiue
authors.forename: Fariba
authors.initials: F
authors.lastname: Hatami
authors.forename: Dirk
authors.initials: D
authors.lastname: Englund