Domain patterning of non-polar cut lithium niobate by focused ion beam

Chezganov, D. S.; Vlasov, E. O.; Pashnina, E. A.; Турыгин, А. П.; Nuraeva, A. S.; Shur, V. Ya.

doi:10.1080/00150193.2020.1722007

Cited by 9 publications

(1 citation statement)

References 47 publications

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“…Periodic inversion of ferroelectric domains by use of piezo force microscopy (PFM), 8,18,19 electron beam and focused ion beam (FIB) have been also investigated. 20,21 These techniques are often incompatible with low loss waveguide fabrication and may result in unstable poling domain inversion or lack of scalability. Submicron domain inversion is needed to enable backward optical harmonic generation that makes use of implicit cavity effects to drastically enhance nonlinear interactions without the need for integrated photonic cavities like microring resonators and Bragg grating cavities.…”

Section: Introductionmentioning

confidence: 99%

Submicron domain engineering in periodically poled lithium niobate on insulator

Krasnokutska,

Tambasco,

Peruzzo

2021

Preprint

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Lithium niobate on insulator (LNOI) is extensively researched for potential applications in telecommunication, sensing and quantum technology. Low-loss waveguides in LNOI have been demonstrated in recent years, with further works investigating their nonlinear optical properties via electric field poling. The fabrication imperfections and minimum feature size of inverted ferroelectric domains currently limit the efficiency and application of nonlinear processes in LNOI. This work looks into focused ion beam poling and demonstrates its potential to overcome the limitations of electric field poling. We numerically investigate the susceptibility of quasi-phase-matching condition to the fabrication flaws in poling periods and waveguide geometry showing its extreme sensitivity. We demonstrate the precise fabrication of poling periods down to 200 nm

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