Absorption and Coherent Interference Effects in Multiply Resonant Four-Wave Mixing Spectroscopy
Absorption and Coherent Interference Effects in Multiply Resonant Four-Wave Mixing Spectroscopy
复制标题
多重共振四波混合光谱中的吸收和相干干涉效应
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
J. C. Wright
中科院分区：
文献类型：
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作者：
Roger J. Carlson;J. C. Wright
本文从理论和实验上研究了2K下掺氮萘晶体中共振与非共振信号间的相干干涉效应以及吸收对多共振四波混频谱的影响。这两种效应都可以强烈地改变线条的形状和强度。线分裂和负光谱特性进行了演示。相干干扰，虽然在这个系统中是可测量的，但很弱。然而，吸收，起着重要的作用，其影响的相位匹配，峰形，峰强度的理论预测和实验测量证实。根据样品吸收系数和吸收截面导出了四波混频的新表达式，并确定了获得最大效率的一般条件。
The effects of coherent interference between resonant and nonresonant signals and the effects of absorption on multiresonant four-wave mixing spectra are investigated both theoretically and experimentally in azu-lene-doped naphthalene crystals at 2 K. Both effects can strongly alter line shapes and intensities. Line splittings and negative spectral features are demonstrated. Coherent interference, although measurable in this system, is weak. Absorption, however, plays an important role, and its effects on phase matching, peak shapes, and peak intensities are predicted theoretically and are confirmed by the experimental measurements. A new expression for the four-wave mixing is derived in terms of sample absorption coefficients and absorption cross sections, and general conditions for maximum efficiency are determined.