Feb. 2011

Article Contents

Chinese Optics> 2011> 4(1): 82-85.

SU Shao-chang, WANG Xi-jun. Measurement of TPA cross-section of organic material films based on picosecond laser nonlinear transmittance method[J]. Chinese Optics, 2011, 4(1): 82-85.

Citation:

SU Shao-chang, WANG Xi-jun. Measurement of TPA cross-section of organic material films based on picosecond laser nonlinear transmittance method[J].Chinese Optics, 2011, 4(1): 82-85.

SU Shao-chang, WANG Xi-jun. Measurement of TPA cross-section of organic material films based on picosecond laser nonlinear transmittance method[J]. Chinese Optics, 2011, 4(1): 82-85.

Citation:

SU Shao-chang, WANG Xi-jun. Measurement of TPA cross-section of organic material films based on picosecond laser nonlinear transmittance method[J].Chinese Optics, 2011, 4(1): 82-85.

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Measurement of TPA cross-section of organic material films based on picosecond laser nonlinear transmittance method

SU Shao-chang^1,2,
WANG Xi-jun¹

1.
Changchun Institute of Optics,Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun 130033,China;
2.
Graduate University of Chinese Academy of Sciences,Beijing 100049,China

Received Date:17 Aug 2010
Rev Recd Date:25 Oct 2010
Publish Date:25 Feb 2011

Abstract

Abstract

In order to measure the Two Photon Absorption(TPA) cross section of organic material films, a new approach to measure the TPA cross section of a azo dye film based on the nonlinear transmission methods by a low power picosecond Nd∶ YVO4 laser was presented. Firstly, a multi-layered equivalent film sample(5 layers, 20 mm20 mm) with the same thickness for each layer was prepared. The film from an azo dye material was spun and coated on a large PC substrate and then it was cut into 20 mm20 mm clips. Furthermore, a mode-locked Nd∶ YVO4 picosecond laser(1 064 nm, 56.8 MHz, 20 ps) was chosen as the pump source to excite the sample. Finally, the nonlinear transmittance of the five-equivalent layer film was measured and the curve of the experimental data was fitted. Obtained result shows the value of the TPA cross section of this dye molecule is 634.2 GM. Compared with other methods, this experimental scheme is very simple and valid.
- organic material film,
- Two Photon Absorption(TPA) cross-section,
- nonlinear transmittance method,
- picosecond laser

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References

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