TY - JOUR
T1 - Efficient parametric frequency conversion in lithium niobate nanophotonic chips
AU - Chen, Jia Yang
AU - Sua, Yong Meng
AU - Ma, Zhao Hui
AU - Tang, Chao
AU - Li, Zhan
AU - Huang, Yu Ping
N1 - Publisher Copyright:
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
PY - 2019/10/15
Y1 - 2019/10/15
N2 - Chip-integrated nonlinear photonics holds the key for advanced optical information processing with superior performance and novel functionalities. Here, we present an optimally mode-matched, periodically poled lithium niobate nanowaveguide for efficient parametric frequency conversions on chip. Using a 4-mm nanowaveguide with subwavelength mode confinement, we demonstrate second harmonic generation with efficiency over 2200% W−1cm−2, and broadband difference frequency generation over a 4.3-THz spectral span. These allow us to generate correlated photon pairs over multiple frequency channels via spontaneous parametric down conversion, all in their fundamental spatial modes, with a coincidence to accidental ratio as high as 600. The high efficiency and dense integrability of the present chip devices may pave a viable route to scalable nonlinear applications in both classical and quantum domains.
AB - Chip-integrated nonlinear photonics holds the key for advanced optical information processing with superior performance and novel functionalities. Here, we present an optimally mode-matched, periodically poled lithium niobate nanowaveguide for efficient parametric frequency conversions on chip. Using a 4-mm nanowaveguide with subwavelength mode confinement, we demonstrate second harmonic generation with efficiency over 2200% W−1cm−2, and broadband difference frequency generation over a 4.3-THz spectral span. These allow us to generate correlated photon pairs over multiple frequency channels via spontaneous parametric down conversion, all in their fundamental spatial modes, with a coincidence to accidental ratio as high as 600. The high efficiency and dense integrability of the present chip devices may pave a viable route to scalable nonlinear applications in both classical and quantum domains.
UR - http://www.scopus.com/inward/record.url?scp=85077282438&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85077282438&partnerID=8YFLogxK
U2 - 10.1364/OSAC.2.002914
DO - 10.1364/OSAC.2.002914
M3 - Article
AN - SCOPUS:85077282438
VL - 2
SP - 2914
EP - 2924
JO - OSA Continuum
JF - OSA Continuum
IS - 10
ER -