Statistical Fine Structure in Inhomogeneously Broadened Absorption Lines in Solids.
Abstract
By using laser FM spectroscopy, we have observed statistical fine structure (SFS) in the inhomogeneously broadened zero-phonon S1 : SO (O-O) absorption of pentacene molecules in crystals of p-terphenyl at liquid helium temperatures. SFS results from variations in the spectral density of absorbers with optical wavelength due to statistics, illustrating that the inhomogeneous line profile is not a simple, smooth Gaussian function as has been previously assumed but rather contains significant fine structure. Theoretical analysis of the SFS spectra using auto-correlation techniques can be used to estimate the underlying value of the homogenous linewidth. This new observation not only provides a novel way to study the statistics of inhomogeneous broadening, but it also allows estimation of the homogenous width without requiring spectral hole-burning or coherent transient techniques. Keywords: Spectral hole-burning, Inhomogeneous broadening, Statistical fine structure.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 22, 1987
- Accession Number
- ADA190341
Entities
People
- T. P. Carter
- W. E. Moerner
Organizations
- International Business Machines Corporation (Armonk, NY)