Shen Y R
Department of Physics, University of California, Berkeley, USA.
Proc Natl Acad Sci U S A. 1996 Oct 29;93(22):12104-11. doi: 10.1073/pnas.93.22.12104.
As a second-order nonlinear optical process, sum-frequency generation is highly surface-specific and accordingly has been developed into a very powerful and versatile surface spectroscopic tool. It has found many unique applications in different disciplines and thus provided many exciting new research opportunities in surface and surface-related science. Selected examples are discussed here to illustrate the power of the technique.
作为一种二阶非线性光学过程，和频产生具有高度的表面特异性，因此已发展成为一种非常强大且通用的表面光谱工具。它在不同学科中发现了许多独特的应用，从而在表面及与表面相关的科学领域提供了许多令人兴奋的新研究机会。这里讨论一些选定的例子来说明该技术的强大之处。
