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Two-Photon Absorption and Optical Power Limiting Based on New Organic Dyes |
| ZHOU Guang-Yong1;WANG Chun1;LEI Hong2,3;WANG Dong1;SHAO Zong-Shu1;JIANG Min-Hua1 |
| 1State Key Laboratory of Crystal Materials, Shandong
University, Ji’nan 250100
2State Key Laboratory of Ultrafast Laser Spectroscopy, Zhongshan University, Guangzhou 510275
3Department of Electronic Engineering, Shandong University, Ji’nan 250100
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| Cite this article: |
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ZHOU Guang-Yong, WANG Chun, LEI Hong et al 2001 Chin. Phys. Lett. 18 1120-1122 |
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Abstract Two new organic dye samples J and L with a large two-photon absorption (TPA) cross section have been reported. The linear absorption spectra show that there is no linear absorption at the wavelength from 650 to 1200 nm. The molecular TPA cross section was measured to be as high as 2.59 x 10-47cm4.s and 2.98 x 10-47cm4.s at 1064 nm for samples J and L, respectively. The input-output curves indicate that there is a clear optical power limiting behaviour when the input intensity is higher than 0.4 GW/cm2. Furthermore, basic theorety of TPA process has been discussed.
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| Keywords:
78.20.Ci
81.05.Lg
45.25.Bs
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Published: 01 August 2001
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| PACS: |
78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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81.05.Lg
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(Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials)
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45.25.Bs
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