Open AccessDevelopment of focusing grating couplers for lithium niobate on insulator platform
Author(s) -
I. Elmanov,
Fiammetta Sardi,
KeQing Xia,
Thomas Kornher,
Vadim Kovalyuk,
A. Prokhodtsov,
Pavel An,
A. Yu. Kuzin,
Anna Elmanova,
Gregory Goltsman,
Roman Kolesov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1695/1/012127
Subject(s) - grating , lithium niobate , materials science , cladding (metalworking) , lithium tantalate , optics , silicon on insulator , optoelectronics , blazed grating , wavelength , transmittance , waveguide , insulator (electricity) , diffraction grating , silicon , physics , composite material
In this paper, we fabricate and experimentally study focusing grating couplers for lithium niobate on an insulator photonic platform. The transmittance of a waveguide equipped with in- and out-couplers with respect to the grating period is measured with and without silicon dioxide cladding applied. Our results show the influence of silicon dioxide cladding on the efficiency and the central wavelength of grating couplers and can be used to improve grating coupling efficiency. Our study is supported by numerical simulations.