Article

Localization of spontaneous emission in front of a mirror

Department of Chemistry, Ultrafast Laser and Spectroscopy Laboratory, University of Groninge, Nijenborgh 16, 9747 AG Groningen, The Netherlands
Optics Communications (Impact Factor: 1.54). 09/1989; DOI: 10.1016/0030-4018(89)90149-1
Source: OAI

ABSTRACT We show that the fluorescence emitted in front of a mirror exhibits angular and spectral localization effects that are caused by self-interference in the spontaneous emission from a Wiener-fringe pattern. A semi-classical description is given and found to be in good agreement with the observations.

Download full-text

Full-text

Available from: Douwe A. Wiersma, Jul 07, 2015
0 Followers
 · 
54 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: We show that the spontaneous emission spectrum of a thin sample in front of a mirror exhibits Wiener-type fringes that contain information on the dephasing dynamics of the excited molecules. In order to probe these dynamics, the molecules must be excited with a short optical pulse or with a light field that has a correlation time shorter than the dephasing time constant T2. The technique is used to study the ultrafast dephasing of nile blue in a polymer matrix at room temperature. A homogeneous dephasing time constant T2 of 100±10 fs is obtained.
    Chemical Physics Letters 06/1990; 169(5). DOI:10.1016/0009-2614(90)87069-4 · 1.99 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We present fluorescence spectra showing that the spontaneous-emission spectrum of a molecule in front of a mirror is not invariant on propagation. We also calculate the cross-spectral density of this light source and show that it does not obey Wolf’s scaling law.
    Physical Review Letters 10/1990; 66(5). DOI:10.1103/PhysRevLett.65.1427 · 7.73 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Detailed measurements of the macroscopic second-order optical nonlinearity χ(2)(2ω,ω,ω) of Langmuir-Blodgett dye-doped monolayers are reported. The observed deviations from a linear behavior of χ(2) with increasing surface density are shown to be due to local-field effects. In order to calculate these local-field factors for disordered systems, a novel Monte Carlo type calculation is introduced. This calculation not only accounts for density variations in the monolayers but also incorporates the effect of off-diagonal elements of the (microscopic) linear susceptibility tensor. Quantitative agreement is found between the calculations and the experimental results using only the molecular hyperpolarizability as a free parameter. A method is presented to determine the tilt angle of the chromophores in Langmuir-Blodgett monolayers from the anisotropy of the linear absorption. The tilt angle determined this way is in excellent agreement with a determination by second-harmonic generation.
    The Journal of Chemical Physics 09/1992; 97(6). DOI:10.1063/1.463895 · 3.12 Impact Factor