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Digitale Medien

Tunable-laser-induced grating dip for measuring sub-picosecond relaxation (1977)

Keilmann, F.

Springer

Applied physics 14 (1977), S. 29-33

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Details

ISSN: 1432-0630

Schlagwort(e): 07.65 ; 78.30 ; 71

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract This paper describes the experimental verification of a laser-induced double-dip resonance predicted theoretically for two-wave saturation spectroscopy. Fine structure in the form of a central dip with a width (FWHM) near 20 cm−1 is found in the broad hole-burning feature induced by 942 cm−1 wavelength radiation inp-type germanium. The central dip is ascribed to Bragg scattering caused by, and thus measuring the decay of, the excited-state population grating set up by interference of the saturating and the probing waves. From the composite spectrum, therefore, apopulation difference lifetimeT 1=0.6 ps can be directly obtained as the inverse width of the central dip. Likewise the broad background feature yields the homogeneous ordipole lifetimeT 2=0.1 ps.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00882630

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