Open AccessTunable polarization mode conversion using thin-film lithium niobate ridge waveguide
Author(s) -
Guang Yang,
Alexander V. Sergienko,
Abdoulaye Ndao
Publication year - 2021
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.426672
Subject(s) - lithium niobate , materials science , tapering , polarization (electrochemistry) , optics , silicon on insulator , waveguide , poling , optoelectronics , photonics , fabrication , photonic integrated circuit , silicon , ferroelectricity , dielectric , computer science , physics , medicine , chemistry , computer graphics (images) , alternative medicine , pathology
Lithium niobate on insulator (LNOI) waveguides, as an emerging technology, have proven to offer a promising platform for integrated optics, due to their strong optical confinement comparable to silicon on insulator (SOI) waveguides, while possessing the versatile properties of lithium niobate, such as high electro-optic coefficients. In this paper, we show that mode hybridization, a phenomenon widely found in vertically asymmetric waveguides, can be efficiently modulated in an LNOI ridge waveguide by electro-optic effect, leading to a polarization mode converter with 97% efficiency. Moreover, the proposed device does not require tapering or periodic poling, thereby greatly simplifying the fabrication process. It can also be actively switched by external fields. Such a platform facilitates technological progress of photonics circuits and sensors.