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Title: Poling thin-film x-cut lithium niobate for quasi-phase matching with sub-micrometer periodicity

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.5143266· OSTI ID:1619858

Quasi-phase-matched grating structures in lithium niobate waveguides with sub-micrometer periodicities will benefit the development of short-wavelength nonlinear optical devices. Here, we report on the reproducible formation of periodically poled domains in x-cut single-crystalline thin-film lithium niobate with periodicities as short as 600 nm. Shaped single-voltage poling pulses were applied to electrode structures that were fabricated by a combination of electron-beam and direct-writing laser lithography. Evidence of successful poling with good quality was obtained through second-harmonic microscopy and piezoresponse force microscopy imaging. For the sub-micrometer period structures, we observed patterns with a double periodicity formed by domain interactions and features with sizes <200 nm.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SIGMA-NONLin
OSTI ID:
1619858
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Vol. 127 Journal Issue: 19; ISSN 0021-8979
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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