Nonlinear imaging of nanostructures using beams with binary phase modulation

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Details

Original languageEnglish
Pages (from-to)10441-10448
Number of pages8
JournalOptics Express
Volume25
Issue number9
Publication statusPublished - 1 May 2017
MoE publication typeA1 Journal article-refereed

Researchers

Research units

  • Tampere University of Technology

Abstract

We demonstrate nonlinear microscopy of oriented nanowires using excitation beams with binary phase modulation. A simple and intuitive optical scheme comprising a spatial light modulator gives us the possibility to control the phase across an incident Hermite-Gaussian beam of order (1,0) (HG10 mode). This technique allows us to gradually vary the spatial distribution of the longitudinal electric fields in the focal volume, as demonstrated by second-harmonic generation from vertically-aligned GaAs nanowires. These results open new opportunities for the full control of polarization in the focal volume to enhance light interaction with nanostructured materials.

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