中国物理B ›› 1999, Vol. 8 ›› Issue (11): 831-837.doi: 10.1088/1004-423X/8/11/006

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MODELING AND SCALING OF CHIELECTRIC RELAXATION OF NONLINEAR OPTICAL POLYMERS IN FREQUENCY DOMAIN

史伟, 房昌水, 潘奇伟, 孙洵, 顾庆天, 许东   

  1. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
  • 收稿日期:1999-01-02 修回日期:1999-03-07 出版日期:1999-11-15 发布日期:2005-06-29
  • 基金资助:
    Supported by the National Natural Science Foundation of China(69990540).

MODELING AND SCALING OF CHIELECTRIC RELAXATION OF NONLINEAR OPTICAL POLYMERS IN FREQUENCY DOMAIN

SHI WEI (史伟), FANG CHANG-SHUI (房昌水), PAN QI-WEI (潘奇伟), SUN XUN (孙洵), GU QING-TIAN (顾庆天), XU DONG (许东)   

  1. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
  • Received:1999-01-02 Revised:1999-03-07 Online:1999-11-15 Published:2005-06-29
  • Supported by:
    Supported by the National Natural Science Foundation of China(69990540).

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摘要： chielectric relaxation theory was demonstrated, chielectric relaxation that selectively probes chromophore reorientation in the frequency domain was described by the Havriliak Negami(HN) function, chielectric spectra of several nonlinear optical (NLO) polymers were fitted well by the HN function. To describe the scaling of chromophore reorientation relaxation in frequency domain, two-shape parameters m and n describing the low- and high- frequency wings of the chielectric spectra need to be specified, besides the chielectric characteristic relaxation time τ and the chielectric strength Δχ(2). From the temperature dependences of m and n of NLO polymers, the relations between the chromophore relaxation and the a relaxation of the polymer host have been revealed.

Abstract: chielectric relaxation theory was demonstrated, chielectric relaxation that selectively probes chromophore reorientation in the frequency domain was described by the Havriliak Negami(HN) function, chielectric spectra of several nonlinear optical (NLO) polymers were fitted well by the HN function. To describe the scaling of chromophore reorientation relaxation in frequency domain, two-shape parameters m and n describing the low- and high- frequency wings of the chielectric spectra need to be specified, besides the chielectric characteristic relaxation time τ and the chielectric strength $\Delta \chi$(2). From the temperature dependences of m and n of NLO polymers, the relations between the chromophore relaxation and the $\alpha$ relaxation of the polymer host have been revealed.

中图分类号:  (Polymers and organics)

  • 42.70.Jk
42.65.An (Optical susceptibility, hyperpolarizability) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)