FM/Stark Double-modulation Spectroscopy For The Detection Of Weak Spectral Features In Solids

Abstract

Spectroscopy for the Detection of Weak Spectral Features in Solids L. Kador, TI? Carter, and W.E Moerner, IBM Research Division, Almaden Research Center, San Jose, CA. Simultaneous frequency moduation of the laser light and Stark modulation of the absorbing centers provides a sensitive, zero-background technique for the detection of weakspectrai features, such as statistical fine structure for pentacene in p-terphenyl crystals at low concentration and for Cr3+ ions in alexandrite.