Optical control of two-photon excitation efficiency of α-perylene crystal by pulse shaping
Optical control of two-photon excitation efficiency of α-perylene crystal by pulse shaping
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DOI：
10.1063/1.1787490
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发表时间：
2004-10
影响因子：
4.4
通讯作者：
T. Okada;I. Otake;R. Mizoguchi;K. Onda;S. Kano;A. Wada
中科院分区：
文献类型：
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作者：
T. Okada;I. Otake;R. Mizoguchi;K. Onda;S. Kano;A. Wada
在30~290K的温度范围内，对α-P晶体的双光子激发效率进行了优化的脉冲整形实验。结果表明，在整个温度范围内，脉冲间隔为90ps的脉冲串和交替反转的相位关系使激发效率提高了2倍。通过双脉冲实验，测量了发射强度与脉冲间隔和脉冲间相对相位的关系，得出了有效提高效率的脉冲波形特征。利用脉冲波形的滑动窗口傅里叶变换，简要讨论了效率提高的机理。
Optimized pulse shaping experiments were carried out on the control of two-photon excitation efficiency of an α-perylene crystal in the temperature region from 30 to 290 K. It was found that a pulse train with a pulse interval of 90 fs and an alternately reversing phase relation increased the excitation efficiency by a factor of 2 for the whole temperature region. The pulse shape characteristic for effective efficiency increase was educed by double pulse experiments in which the dependence of the emission intensity on the pulse interval and relative phase between pulses were measured. The mechanism of the efficiency increase is briefly discussed using a sliding-window Fourier transform of the pulse shape.