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Impact of longitudinal fields on second harmonic generation in lithium niobate nanopillars
KTH, School of Engineering Sciences (SCI), Applied Physics, Quantum Electronics and Quantum Optics, QEO.ORCID iD: 0000-0001-7242-7300
KTH, School of Engineering Sciences (SCI), Applied Physics, Quantum Electronics and Quantum Optics, QEO.
2016 (English)In: APL Photonics, ISSN 2378-0967, Vol. 01, no 06, 061302Article in journal, Letter (Refereed) Published
Abstract [en]

An optimized focused ion beam process is used to fabricate micrometer-long LiNbO3 nanopillars with diameters varying between 150 and 325 nm. Polarimetric mappings of second harmonic generation from a wavelength of 850 nm demonstrate the ability to modify the polarization features of the nonlinearresponse through a fine adjustment of the pillar size. The effect is ascribed to the non-negligible contribution of the longitudinal fields associated with sub-wavelength light confinement in the LiNbO3nanopillars. The results also highlight the importance of a fine control over the nanopillar size in order to effectively engineer their nonlinear response.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2016. Vol. 01, no 06, 061302
Keyword [en]
Second harmonic generation, Polarization, Nanostructures, Focused ion beam technology, Nonlinear optical materials
National Category
Nano Technology Other Physics Topics
Research subject
URN: urn:nbn:se:kth:diva-192470DOI: 10.1063/1.4953670OAI: diva2:968788
Vattenfall AB

QC 20160920

Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2016-09-20Bibliographically approved

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