Lithium niobate photonic wires

LN photonic wires of cross-section dimensions down to 1 x 0.73 microm2 were fabricated by Ar milling of a single-crystalline LiNbO3 (LN) film bonded to a SiO2/LiNbO3 substrate. Mode intensity distributions, propagation losses, and group indices of refraction were measured at 1.55 microm wavelength a...

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Bibliographic Details
Published in:Optics express 2009-12, Vol.17 (26), p.24261-24268
Main Authors: Hu, H, Ricken, R, Sohler, W
Format: Article
Language:English
Subjects:
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Materials Testing
Nanostructures - chemistry
Nanostructures - ultrastructure
Niobium - chemistry
Optical Devices
Oxides - chemistry
Photons
Refractometry - instrumentation
Scattering, Radiation
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Summary:LN photonic wires of cross-section dimensions down to 1 x 0.73 microm2 were fabricated by Ar milling of a single-crystalline LiNbO3 (LN) film bonded to a SiO2/LiNbO3 substrate. Mode intensity distributions, propagation losses, and group indices of refraction were measured at 1.55 microm wavelength and compared with simulation results. Moreover, effective mode indices and end face reflectivities were numerically evaluated. The waveguide of 1 microm top width is the smallest LN photonic wire reported to date; it has a mode size of approximately 0.4 microm2 (0.5 microm2) only and propagation losses of 9.9 dB/cm (12.9 dB/cm) for qTM (qTE) polarization.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.17.024261