A Comparative study of the photorefractive effect in Bi12SiO20 Crystals

Autor: F.P. Strohkendl, P. Tayebati, R.W. Hellwarth
Rok vydání: 1987
Zdroj: Topical Meeting on Photorefractive Materials, Effects, and Devices.
DOI: 10.1364/prm.1987.wb1
Popis: We perform beam-coupling and erasure experiments in four different nominally undoped Bi12SiO20 (BSO) crystals. We use the theory of electron-hole competition1,2 in photorefractive gratings to analyze our data. We determine the diffusion- lengths Ke−1, Kn−1 for electrons and holes, the ratio S of hole to electron absorption, the Debye screening wavevector ko, the total absorption coefficient and the quantum efficiency.
Databáze: OpenAIRE