Nonlinear imaging of nanostructures using beams with binary phase modulation
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||8|
|Publication status||Published - 1 May 2017|
|MoE publication type||A1 Journal article-refereed|
- Tampere University of Technology
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.