Rare-earth Epitaxial Films as a Platform for Quantum Information Manipulation
Takehiko Tawara, Hiroo Omi · NTT technical review · 2014
Rare-earth ions in a solid form have discrete energy levels peculiar to the ionic species, and they are therefore expected to become an excellent platform material for quantum information manipulation.A promising candidate for this purpose is rare-earth epitaxial film such as erbium oxide (Er 2 O 3 ) film grown on a silicon substrate.This article describes the high-quality crystal growth and excellent optical characteristics of Er 2 O 3 epitaxial films for quantum information devices.