CaltechAUTHORS
  A Caltech Library Service

Multiple phase-coherent laser pulses in optical spectroscopy. II. Applications to multilevel systems

Warren, W. S. and Zewail, Ahmed H. (1983) Multiple phase-coherent laser pulses in optical spectroscopy. II. Applications to multilevel systems. Journal of Chemical Physics, 78 (5). pp. 2298-2311. ISSN 0021-9606. https://resolver.caltech.edu/CaltechAUTHORS:20160922-133202103

[img] PDF - Published Version
See Usage Policy.

1MB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20160922-133202103

Abstract

The effects of intense laser pulse trains in coupled multilevel systems (such as pure or mixed molecular crystals) are analyzed by calculating exact density matrix evolutions. It is shown that two‐level approximations are inadequate. The contributions of exchange couplings, inhomogeneous broadening, permanent multipole interactions and transition multipole interactions to absorption and photon echo line shapes are calculated. The absorption line shape of 1,4‐dibromonaphthalene (DBN) is shown to be predominantly an isotopic substitution effect, as our Monte Carlo results give quantitative agreement with experiment for this model. Average t‐matrix approximations to the Green’s function, which have been used to propose a different mechanism for the DBN line shape are shown to be qualitatively inadequate. Dipole–dipole interactions are shown to be an important photon echo decay mechanism in mixed crystals, with the relative importance of permanent and transition multipole interactions dependent on the resonance frequency distribution. Multiple pulse trains, including multiple pulse echoes and optical multiple‐quantum sequences, are shown to be capable of distinguishing different types of interactions in the molecular Hamiltonian and reducing optical density effects. Specific pulse sequences are proposed and their effects are calculated.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.445084DOIArticle
http://scitation.aip.org/content/aip/journal/jcp/78/5/10.1063/1.445084PublisherArticle
Additional Information:© 1983 American Institute of Physics. Received 28 July 1982 Accepted 04 November 1982. This work was supported by a grant from the National Science Foundation, No. DMR81-05034. We wish to thank Dr. Zeev Luz for permission to use his spectra in Fig. 3, and Dr. H. Port for permission to use their spectrum of 1, 4-dibromonaphthalene in Fig. 8(a} prior to publication.
Funders:
Funding AgencyGrant Number
NSFDMR-8105034
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Arthur Amos Noyes Laboratory of Chemical Physics6662
Issue or Number:5
Record Number:CaltechAUTHORS:20160922-133202103
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160922-133202103
Official Citation:Multiple phase‐coherent laser pulses in optical spectroscopy. II. Applications to multilevel systems Warren, W. S. and Zewail, Ahmed H., The Journal of Chemical Physics, 78, 2298-2311 (1983), DOI:http://dx.doi.org/10.1063/1.445084
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:70540
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:30 Sep 2016 19:42
Last Modified:03 Oct 2019 10:31

Repository Staff Only: item control page