{"title":"Weak-Field Coherent Control of Ultrafast Molecule Making","authors":"Moran Geva, Yonathan Langbeheim, Arie Landau, Zohar Amitay","doi":"10.1103/physrevlett.133.193201","DOIUrl":null,"url":null,"abstract":"Coherent control of ultrafast molecule making from colliding reactants is crucial for realizing coherent control of binary photoreactions (CCBP). To handle diverse excitation scenarios, feasibility with both weak and strong fields is essential. We experimentally demonstrate here the weak-field feasibility, achieving it even under thermally hot conditions typical of chemical reactions. The making of KAr complexes from hot pairs of colliding K and Ar atoms via resonance-mediated two-photon excitation is controlled by weak linearly chirped femtosecond pulses. Negative chirps enhance the yield. Our experimental and <i>ab initio</i> theoretical results are in excellent agreement. New routes to CCBP are opened.","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical review letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/physrevlett.133.193201","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Coherent control of ultrafast molecule making from colliding reactants is crucial for realizing coherent control of binary photoreactions (CCBP). To handle diverse excitation scenarios, feasibility with both weak and strong fields is essential. We experimentally demonstrate here the weak-field feasibility, achieving it even under thermally hot conditions typical of chemical reactions. The making of KAr complexes from hot pairs of colliding K and Ar atoms via resonance-mediated two-photon excitation is controlled by weak linearly chirped femtosecond pulses. Negative chirps enhance the yield. Our experimental and ab initio theoretical results are in excellent agreement. New routes to CCBP are opened.
碰撞反应物产生超快分子的相干控制对于实现二元光反应(CCBP)的相干控制至关重要。要处理各种激发情况,必须同时具备弱场和强场的可行性。我们在此通过实验证明了弱场的可行性,即使在化学反应典型的热高温条件下也能实现。通过共振介导的双光子激发,K 原子和 Ar 原子的热对碰撞产生的 KAr 复合物由弱线性啁啾飞秒脉冲控制。负啁啾可提高产量。我们的实验结果和 ab initio 理论结果非常吻合。这开辟了通向 CCBP 的新途径。
期刊介绍:
Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics:
General physics, including statistical and quantum mechanics and quantum information
Gravitation, astrophysics, and cosmology
Elementary particles and fields
Nuclear physics
Atomic, molecular, and optical physics
Nonlinear dynamics, fluid dynamics, and classical optics
Plasma and beam physics
Condensed matter and materials physics
Polymers, soft matter, biological, climate and interdisciplinary physics, including networks