MSE Supplies offers Lithium Niobate (LiNbO₃) Thin Film on Lithium Niobate wafer. The wafer consists of a SiO₂ layer in between lithium niobate and lithium niobate thin film layers. Lithium niobate is a versatile material with high nonlinearities and unique optical and electro-optical properties, which is widely used in photonics related applications, including modulators and many other optical communication devices. The insulating substrate provides a stable platform and reduces surface recombination, which makes it a better material than bulk lithium niobate in many ways, including smaller size and footprint (suitable for integration of miniaturized electronic devices), lower propagation loss (more efficient), higher mechanical stability and resistance to environment, etc. It is now investigated as a promising material for the development of next-generation electronic and photonic devices.

Specification:

General Wafer
Structure	LiNbO₃/ SiO₂ / LiNbO₃
Diameter	Φ100 ± 0.2 mm
Thickness	500 ± 20 μm
Primary Flat Length	32.5 ± 2 mm
Secondary Flat Length	12 ± 2 mm
Wafer Beveling	R Type
LTV	< 1.5 μm (5∗5 mm²) / 95%
Bow	Within 50 μm
Edge Exclusion	5 mm
Lithium Niobate Layer
Thickness	300 ± 20 nm ; 400 ± 20 nm ; 500 ± 20 nm ; 600 ± 20 nm ; 700 ± 20 nm
Orientation	Z axis ± 0.5°
Primary Flat Orientation	Perpendicular to Y axis ± 1°
Surface Roughness (Ra)	< 1 nm @ 10 μm x 10 μm
Defects	> 1 mm None ; ≦ 1 mm within 80 total
Scratch	> 1 cm None ; ≦ 1 cm within 3 total
SiO₂ Layer
Thickness	2000 ± 100 nm
Substrate
Material	LiNbO₃
Orientation	Same as top layer

Please contact us for bulk order or customized shape, size, thickness and substrate.

References:

1. Integrated photonics on thin-film lithium niobate. Advances in Optics and Photonics, 13(2), 242-352.

2. Grating coupler on lithium niobate thin film waveguide with a metal bottom reflector. Optical Materials Express, 7(11), 4010-4017.

3. Waveguides in single-crystal lithium niobate thin film by proton exchange. Optics Express, 23(2), 1240-1248.