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Updated: Jul 7, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Nanometer scale polarimetry studies using a near-field scanning optical microscope.

E B McDaniel¹, S C McClain, J W Hsu

¹Department of Physics, University of Virginia, Charlottesville, Virginia 22903, USA.

|February 13, 2008

Summary

We developed a new near-field scanning optical microscopy (NSOM) technique for nanoscale polarimetry. This method quantitatively measures optical anisotropy in materials with high sensitivity and spatial resolution.

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Area of Science:

Materials Science
Optical Physics
Nanotechnology

Background:

Near-field scanning optical microscopy (NSOM) offers high spatial resolution for material analysis.
Quantitative polarimetry is crucial for understanding material optical properties.
Existing techniques struggle to combine high sensitivity with nanoscale resolution.

Purpose of the Study:

To introduce a novel NSOM technique incorporating polarization modulation.
To enable quantitative nanoscale polarimetry for optical anisotropy studies.
To achieve simultaneous measurement of birefringence and dichroism.

Main Methods:

Integration of polarization modulation into NSOM.
Application of dynamic polarimetry principles within NSOM.

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Imaging of stress-induced birefringence in SrTiO3 bicrystals.

Main Results:

Simultaneous quantitative measurement of linear birefringence and dichroism magnitude and orientation.
Demonstration of high sensitivity (3 x 10(-3) rad retardance).
Imaging of submicrometer defects (features as small as 150 nm).

Conclusions:

The new technique provides high sensitivity and spatial resolution for nanoscale polarimetry.
It enables detailed characterization of optical anisotropy in materials.
This advancement is valuable for studying nanoscale optical properties and defects.