Periodic domain patterning by electron beam of proton exchanged waveguides in lithium niobate
- Others:
- Ferroelectric Laboratory ; Ferroelectric Laboratory ; Ural Center for Shared Used "Modern nanotechnology"-Ural Federal University [Ekaterinburg] (UrFU)-Ural Center for Shared Used "Modern nanotechnology"-Ural Federal University [Ekaterinburg] (UrFU)
- Laboratoire de physique de la matière condensée (LPMC) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)
Description
Formation of domain structure by electron beam irradiation in congruent lithium niobate covered by surface dielectric layer with planar and channel waveguides produced by Soft Proton Exchange (SPE) process has been studied. Formation of domains with arbitrary shapes as a result of discrete switching has been revealed. The fact was attributed to ineffective screening of depolarization field in the crystals presenting a surface layer modified by the SPE process. The dependences of the domain sizes as a function of the dose and the distance between irradiated areas have been measured. Finally, we have demonstrated that electron beam patterning using surface resist layer can produce high quality periodical poling after channel waveguide fabrication. Second harmonic generation with normalized nonlinear conversion efficiency up to 48%/(W cm 2) has been achieved in such waveguides.
Abstract
International audience
Additional details
- URL
- https://hal.science/hal-01314704
- URN
- urn:oai:HAL:hal-01314704v1
- Origin repository
- UNICA