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Nonlinear microscopy using cylindrical vector beams: Applications to three-dimensional imaging of nanostructures
Optics Express
|August 9, 2017
Summary
Cylindrical vector beams enable novel 3D imaging of nano-objects. This nonlinear microscopy technique advances the study of individual nanostructures in three dimensions.
Area of Science:
- Optics and Photonics
- Nanotechnology
- Microscopy
Background:
- Three-dimensional (3D) optical fields from cylindrical vector beams (CVBs) offer enhanced contrast for nano-object imaging.
- Previous applications were limited to 2D scanning or point-like objects.
Purpose of the Study:
- To demonstrate the first application of CVBs for 3D imaging of 3D nano-objects.
- To utilize the unique optical fields generated by CVBs for nanoscale structural analysis.
Main Methods:
- Employed CVBs with radial and azimuthal polarizations for focusing.
- Acquired 3D image scans of the second-harmonic generation (SHG) signal.
- Studied vertically-aligned semiconductor nanowires, leveraging their longitudinal electric field response.
Main Results:
- Successfully achieved 3D imaging of 3D nano-objects using CVBs.
- Demonstrated the capability to resolve nanostructures in three dimensions.
- Showcased the sensitivity of the SHG signal to the longitudinal electric field of nanowires.
Conclusions:
- CVBs provide a powerful new tool for 3D imaging of nanostructures.
- This technique combines nonlinear microscopy with CVBs for advanced nano-object characterization.
- Offers a novel approach for studying individual nano-objects in three dimensions.
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