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Self-organized and high-density filamentous nanodomain patterns fabricated in lithium niobate by discharge poling

[+] Author Affiliations
Simonetta Grilli, Melania Paturzo, Paolo De Natale, Pietro Ferraro

Istituto Nazionale di Ottica Applicata del CNR (CNR-INOA), Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy

J. Micro/Nanolith. MEMS MOEMS. 7(3), 039701 (August 06, 2008). doi:10.1117/1.2959178
History: Received September 10, 2007; Revised January 14, 2008; Accepted March 24, 2008; Published August 06, 2008
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We report on spontaneous formation of nanoscale surface domains obtained in lithium niobate substrates by electric field discharge poling. A constant high voltage was applied at room temperature to virgin and unpatterned crystals in air, by using metal tip-shaped electrodes. An enhancement of the electric field in correspondence of the electrode tips was expected due to the fringing field effect, and electric discharge was observed during the process. The standard wet etching in hydrofluoric acid solution revealed the formation of nanoscale domain structures that exhibit filamentous self-organized geometries. Topographic measurements of the fabricated structures were performed by an atomic force microscope, and the corresponding results are presented and discussed. The investigation provides remarkable information about the shortest domain size possibly obtainable by electric field poling.

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© 2008 Society of Photo-Optical Instrumentation Engineers

Citation

Simonetta Grilli ; Melania Paturzo ; Paolo De Natale and Pietro Ferraro
"Self-organized and high-density filamentous nanodomain patterns fabricated in lithium niobate by discharge poling", J. Micro/Nanolith. MEMS MOEMS. 7(3), 039701 (August 06, 2008). ; http://dx.doi.org/10.1117/1.2959178


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