DIAMOND-LIKE TWO-PHONON ABSORPTION IN HYDROGENATED AMORPHOUS CARBON MODIFIED WITH COPPER

Abstract Diamond nucleation in hydrogenated amorphous carbon films containing ultradispersed copper was monitored by the measurement of IR absorption at the diamond two-phonon frequencies. Anomalously high two-phonon absorption observed in this experiments allowed us to increase the sensitivity of the method. Mechanisms of the two-phonon absorption enhancement are discussed in terms of electrodynamics of media containing nanosize inclusions of copper-doped graphite fragments. Local fields induced by electromagnetic radiation in nanodiamonds in the vicinity of copper-doped graphite fragments were shown to be responsible for the observed amplification of two-phonon absorption.