CAJ | 학술논문

利用"反直觉"频率啁啾激光脉冲分析了偶能级ladder系统的布局数迁移,其中在缀饰激光场作用下N-2个中间态进行耦合.作为偶能级ladder系统的代表,我们着重分析了四能级ladder系统.研究发现如果缀饰激光场足够强且发生共振,则在能级1和能级4之间发生完全布局数迁移必须要求有一个恰当的脉冲叠加面积,调谐pump激光和stokes激光,使其中一个缀饰中间态发生共振,则可以使这个四能级系统简化为三能级系统.
이용"반직각"빈솔조추격광맥충분석료우능급ladder계통적포국수천이,기중재철식격광장작용하N-2개중간태진행우합.작위우능급ladder계통적대표,아문착중분석료사능급ladder계통.연구발현여과철식격광장족구강차발생공진,칙재능급1화능급4지간발생완전포국수천이필수요구유일개흡당적맥충첩가면적,조해pump격광화stokes격광,사기중일개철식중간태발생공진,칙가이사저개사능급계통간화위삼능급계통.
Even-N-level ladder system has been analyzed for population transfer by counterintuitive frequencychirped laser pulse,in which N-2 intermediate states are strongly coupled by dressing laser field.The specific analysis for the four-level ladder system has been carried out by using a dressed-state picture,as representative for even-N-system.It is found that fl well-controlled pulse area is required for complete population transfer from | 1＞←→|4)if the dressing field is sufficiently strong and on resonance.And it is essential to detune thepump and Stokes lasar so that one of the dressed intermediate states is on resonance.leading to the reduction of the whole system to the three-level system.