摘要
Accordingtothedipoletransitionselectionrulesandbychoosingpropertransitionchannels,itisfoundthattheinvertedY-typefour-levelschemecanbeclassifiedintoninedifferent2nd-ordersubschemeswhenusingcorrespondinglaserfields,andtheycanbefurtherclassifiedintoeighty3rd-ordersubschemesindetailaccordingtodifferentexcitingintensitiesthatareappliedindifferentchannels.Inthispaper,thestructuremultiformityofinvertedY-typefour-levelschemeisdiscussedandthedemonstrationsonsomesubschemesarealsogiven.Atthesametime,thesubschemeswhichhavebeenstudiedarepointedout,butmostofthemhavenotbeenresearchedtothebestofourknowledge.
出版日期
2010年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
