Abstract
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 nonlinear response 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 LiNbO3 nanopillars. The results also highlight the importance of a fine control over the nanopillar size in order to effectively engineer their nonlinear response.
Highlights
An optimized focused ion beam process is used to fabricate micrometer-long LiNbO3 nanopillars with diameters varying between 150 and 325 nm
We study the polarization features of second harmonic generation (SHG) from
The effect stems from a non-negligible contribution to SHG arising from the longitudinal components of the optical modes confined in the NPs and points out to new possibilities afforded by advanced LiNbO3 nano-structuring technologies in order to tailor the efficiency and the radiation patterns of nanoscopic emitters on this important nonlinear photonic platform
Summary
An optimized focused ion beam process is used to fabricate micrometer-long LiNbO3 nanopillars with diameters varying between 150 and 325 nm. Impact of longitudinal fields on second harmonic generation in lithium niobate nanopillars Mohammad Amin Baghban and Katia Galloa Department of Applied Physics, School of Engineering Sciences, KTH–Royal Institute of Technology, Stockholm SE-106 91, Sweden (Received 10 March 2016; accepted 30 May 2016; published online 14 July 2016)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
