Interaction between an electronic system and multiphotons in a strong laser field 強光場中電子系統與多光子的相互作用
The discrete variable representation ( dvr ) scheme is applied to investigate the photoelectron spectrum ( pes ) of multiphoton ionization for some diatomic molecules in strong fields 摘要采用離散變量表示( dvr )方案研究了雙原子分子在強場下的多光子電離光電子能譜,得到了與實驗相同的結果。
With the intensity of laser increased a series of new phenomena appears , for example , multiple photon lonization ( mpi ) , above threshold lonization ( ati ) , tunnel lonization ( tl ) , stable lonization ( si ) and so on 隨著激光強度的增加,會出現一系列的新現象,例如多光子電離,隧穿電離,閾上電離和穩定化電離等現象。
The main results are : ( 1 ) the tof - ms and rempi spectrum of carbon disulfide are detected . ( 2 ) the tof - ms of carbon disulfide is identified ; the rempi spectra of c , s , cs and cs2 are analyzed ( 3 )通過對實驗測定的tof質譜和分質量的rempi譜的分析,討論了二硫化碳分子的多光子共振電離一解離通道以及碎片的解離通道。
In another circunstance , the tvo ent angle datom considered as identical particles and they both move in the optical field . after an interaction time t , the levels of the entangled atoms are split into different levels 若對這些模型作進一步的擴展,則是研究n個原子與單模場的相互作用,其中包括多原子體系與單模場的單光子相互作用和多光子相互作摘要用。
The resonance - enhanced multi - photon ionization ( rempi ) spectrum of no in the region of 420 - 680nm is obtained by using optical parameter generator and amplifier ( opg / opa ) as radiation source . the opg / opa was pumped by nd : yag ( quantel ) laser 本工作以超短脈沖( 35ps ) nd : yag激光的三倍頻輸出( 355nm )泵浦光學參量發生放大器作為激發源,獲得了no分子在420 680nm波長范圍內的多光子共振離化光譜。
4 . we attempted to carry out the experiment of co a3 ( v = 18 ) / d1 ( v = 10 ) collision with he in a static cell using oodr - mpi technique for the preparation of doing experiment in a molecular beam machine . in the experiment of 2 + 1 ' + 1 " two - color rempi , we conformed the accidental predissociation of co ( e1 , v = l ) state , and studied the effect of the accidental predissociation of co ( e1 , v = 1 ) state for different rotational states 4 .為了在分子束實驗條件下進行實驗,用光學一光學雙共振多光子電離光譜( oonr一mpi )的方法,在靜態池條件下,對較長壽命的eo ( a ’ n , v = 18 ) / ( d ’ , v = 10 )單重態一三重態之間的碰撞傳能實驗進行了嘗試。
The propagation of ultrashort laser pulse in air is analyzed with mechanics analogy by considering kerr effects and free electron defocusing . the equation describing the evolution of the laser spot is derived . it is shown that long distance focusing requires large initial beam and the propagation distance is very sensitive to the initial divergence angle of the laser beam 考慮多光子電離效應和光學kerr效應,首次利用力學類比的方法研究了超短脈沖激光在電離氣體中的傳輸,詳細分析了傳輸距離與激光初始光斑、初始發散角以及激光功率的關系,提出了實現長距離傳輸的條件。
( 3 ) the possible mechanism of dissociation / ionization is analyzed , ( 4 ) it is shown that the main dissociation channel is non - resonant photodissociation of parent molecule followed by the further photodissociation or photoionization of the fragments . in chapter six , the rempi - tof - ms of acetaldehyde are investigated in the range of 279 . 5 - 286 . 5nm . the main results are : ( 1 ) the tof - ms and rempi spectrum of acetaldehyde are measured 第六章主要報道了乙醛分子在279 . 5一286 . 5nm范圍內的共振增強多光子解離一電離過程的實驗研究結果和分析結果,主要內容有: ( l )實驗測定了乙醛分子的共振增強多光子電離的tof質譜和分質量的既mpi譜。