Highly sensitive pump-probe polarimetry: Measurements of polarization rotation, ellipticity, and depolarizationстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:A highly sensitive polarimetry method for measuring small photoinduced parameters, such as the rotation of the polarization azimuth and changes in the ellipticity and degree of depolarization, is developed on the basis of the pump-probe technique. The sensitivity of the polarimetric method under technical and shot-noise fluctuations of the optical power of the probe beam is analyzed, and optimal settings of the polarimeter are found. The method developed is applied to investigations of nanopolyacetylene films using continuous-wave, picosecond, and femtosecond lasers. Typical angles of polarization rotation were 10(-5)-10(-8) rad.