Control of Photodissociation Products by Variation of Laser Phase

在化学系物理化学计划的这个项目中，哥伦比亚大学的理查德·伯森教授将在受控化学反应领域进行研究。按照布鲁默、夏皮罗和赫本的建议，化学反应的产率将通过改变两个激光器的相对相位来改变。具体地说，将调查HABC形式的系统：HONO、HNCO、HNNN、HOOH和HOCD3，它们解离成相互竞争的频道HA+BC或H+ABC。虽然相对位相的控制已经成功地证明了单光子和三光子的吸收过程，但分子解离的位相控制到目前为止还没有得到证实。这些实验将有助于我们理解并最终提高我们沿着所需路径控制化学反应结果的能力。

In this project in the Physical chemistry program of the Chemistry Division, Prof. Richard Bersohn of Columbia University will conduct research in the area of controlled chemical reactions. The yields of chemical reactions are to be changed by variation of the relative phase of two lasers, following the suggestion of Brumer, Shapiro and Hepburn. Specifically, systems of the form HABC: HONO, HNCO, HNNN, HOOH and HOCD3, dissociating into competing channels HA + BC or H + ABC will be investigated. While control of the relative phase has been used to successfully demonstrate one photon and three photon absorption processes, phase control of molecular dissociation has not been demonstrated so far. These experiments will contribute to our understanding and ultimately to our ability of controlling the outcome of chemical reaction along a desired path.