%0 Journal Article
%T ON THE RAMAN EFFECT OF MULTIPLE RADIATION PROCESS AND ITS APPLICATIONS IN SPECTROSCOPY<br>论高阶辐射过程Raman效应及其在光谱学中的应用
%A LI YIN-YUAN
%A <br>李荫远
%J 物理学报
%D 1964
%I 
%X In the strong electromagnetic field of a laser beam, the third-order process of radiation with two photons absorbed and a third one emitted during a transition between energy levels of a material system may become abservable. This process has analogy with the ordinary Raman effect, in which only two photons are involved. In this paper a theoretical analysis has been given with the conclusion reached, that with a beam intensity of 0.1 MW/cm2 the vibrational Raman spectrum of molecules or crystals may be obtained by the three-photon process. It is shown that this effect actually offers a new spectroscopical method. Its importance lies in the difference of the selection rule of this effect and those of the infra-red absorption and the ordinary Raman effect. It is also pointed out that the stimulated radiation of a three-photon Raman effect may be realized when pumped with a powerful laser beam.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=B27AF4CA2A5DCF6F&yid=29B68C6EE36B014B&vid=A04140E723CB732E&iid=0B39A22176CE99FB&sid=F260CE035846B3B8&eid=DABEF202280E7EF1&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0