Using the phase of light as a photochemical tool

Robert J. Gordon*, Langchi Zhu, Tamar Seideman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


It is shown both theoretically and experimentally that the phase of a transition dipole matrix element may be . determined from the interference between competing quantum mechanical paths. Specifically, we consider simultaneous m- and n-photon excitation of a molecule to a degenerate continuum state, leading to multiple reaction products. Variation of the relative phase of the electromagnetic fields produces a modulation of the product signals in the various channels. A relation between the phase lag between a pair of product signals and properties of the continuum is established. Information is revealed about coupling mechanisms, the properties of weak spectroscopic transitions, and the phases of quasi-bound wave functions.

Original languageEnglish (US)
Pages (from-to)4387-4394
Number of pages8
JournalJournal of Physical Chemistry A
Issue number18
StatePublished - May 10 2001

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry


Dive into the research topics of 'Using the phase of light as a photochemical tool'. Together they form a unique fingerprint.

Cite this