Accession Number : ADA195483

Title :   Pseudo-Stark Effect and FM/Stark Double Modulation Spectroscopy for the Detection of Statistical Fine Structure in Alexandrite.

Descriptive Note : Interim technical rept.,

Corporate Author : IBM ALMADEN RESEARCH CENTER SAN JOSE CA

Personal Author(s) : Carter, T P ; Horn, D E ; Moerner, W E

PDF Url : ADA195483

Report Date : 20 Jun 1988

Pagination or Media Count : 24

Abstract : Using laser-FM spectroscopy and transient spectral hole burning, the R1m transition of Cr3+ ions in alexandrite is shown to exhibit a linear pseudo-Stark effect with coefficients of 0.141 MHz-cm/V and 0.0538 MHz-cm/V at 1.6 K for electric fields along the crystal a and c axes, respectively. This result was used to develop a sensitive FM/Stark double modulation method for the detection of statistical fine structure (SFS) on the inhomogeneously broadened R1m line. While the final signal-to-noise ratio is not much greater than unity, autocorrelation of the measured spectra provides the first strong evidence for the presence of SFS in an inorganic material. Keywords: Statistical fine structure, Alexandrite, Stark effect, Modulation spectroscopy, FM Spectroscopy.

Descriptors :   *BERYL, *SPECTROSCOPY, *STARK EFFECT, AUTOCORRELATION, AXES, COEFFICIENTS, DETECTION, ELECTRIC FIELDS, FREQUENCY MODULATION, GEMS(MINERALS), INORGANIC MATERIALS, MATERIALS, MODULATION, SIGNAL TO NOISE RATIO, STATISTICS

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE