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Poling quality evaluation of optical superlattice using 2D Fourier transform method.
1National Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, People's Republic of China.
Optics Express
|November 13, 2009
Summary
We present a new method using 2D Fourier transforms to assess optical superlattice (OSL) poling quality. This technique rapidly calculates reciprocal vector magnitudes from etched OSL sample micrographs, validated by second harmonic generation experiments.
Area of Science:
- Materials Science
- Optics and Photonics
- Crystallography
Background:
- Optical superlattices (OSL) are crucial for nonlinear optical applications.
- Accurate evaluation of poling quality is essential for device performance.
- Existing methods for assessing poling quality can be time-consuming or complex.
Purpose of the Study:
- To develop a rapid and direct method for evaluating the poling quality of optical superlattices.
- To utilize two-dimensional (2D) Fourier transform analysis for OSL characterization.
- To validate the proposed method using experimental data.
Main Methods:
- Fabrication of -Z or +Z face etched OSL samples using standard electric field poling.
- Analysis of processed micrographs of etched OSL surfaces.
- Application of two-dimensional (2D) Fourier transform to calculate reciprocal vector magnitudes.
- Validation through second harmonic generation (SHG) experiments.
Main Results:
- The 2D Fourier transform method allows for direct and rapid calculation of OSL reciprocal vector magnitudes.
- The method provides quantitative assessment of poling quality.
- Experimental results from SHG confirm the accuracy of the evaluation method.
Conclusions:
- The developed 2D Fourier transform method offers an efficient and reliable approach for evaluating OSL poling quality.
- This technique simplifies the characterization process for nonlinear optical materials.
- The findings contribute to the advancement of OSL fabrication and application.
