Perturbation Spectroscopy and Optical Detection of Paramagnetic Resonance

摘要: Zeeman and Stark effects have long been studied on the narrow spectral lines emitted by atoms in gases. Similar recently for impurities or defect solids which broad absorption emission bands (1). This became possible due to development of a new experimental technique, essentially lock-in detection, allows one measure very small variations intensities produced when perturbation is applied crystal. effect studies are described Spinolo some consequences stress outlined Van der Osten. My discussion restricted measurements circular dichroism magnetic fields linear under uniaxial stress. In this first lecture I outline principle these differential techniques describe how they may uncover structures electronic levels much smaller than width an optical band. then show that spectroscopy excellent tool study such phenomena as electron-lattice coupling Jahn-Teller (2–4).