Abstract
We demonstrate high contrast quantum interference between one-photon and three-photon absorption pathways in an organic solid at room temperature. Illumination of a thin polymer film activated with fluorescing dendrimer chromophores of large three photon absorption cross section with two simultaneous femtosecond pulses at near-IR frequency omega and its third harmonic UV frequency 3omega results in a spatial interference fringe pattern observable by eye.
Highlights
Interference is a fundamental physical property that explains a number of everyday observations and is a cornerstone of modern quantum mechanics
We find that the maximum contrast in this case is 68 % and this would mean that the maximum contrast for a 3 Jlm sample would be on the order of 50%, if we neglect the changes in the pulse shapes as the pulses propagate
Quantum interference in an organic solid has been demonstrated for the first time
Summary
Interference is a fundamental physical property that explains a number of everyday observations and is a cornerstone of modern quantum mechanics. The first experiments on this kind of interference were made in gas phase on atomic vapors under high intensity conditions. A number of experiments have demonstrated this effect in atomic vapors and in small molecules in gas phase [2,3]. These first experiments were dealing with bound-bound transitions. The excitation scheme can lead to control of the dissociation/ionization of small molecules like HI (in gas phase). In the case of HI it has been shown that either ionization or dissociation can be enhanced by varying the relative phase of the two fields [4]. This opened up the possibility of coherent control of chemical reactions [5,6,7] [1] 1 this field has seen an enormous growth over the past 15 years there has been little progress for this control scenario
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
