Open AccessPhotonic crystal cavity-assisted upconversion infrared photodetector
Author(s) -
Xuetao Gan,
Xinwen Yao,
Ren-Jye Shiue,
Fariba Hatami,
Dirk Englund
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.012998
Subject(s) - photon upconversion , photodetector , materials science , optoelectronics , optics , photodiode , autocorrelator , silicon , infrared , laser , doping , physics
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.