Femtosecond-laser-excited luminescence of the A-band in natural diamond and its thermal control
S. I. Kudryashov, П. А. Данилов, Nikita Smirnov, A. V. Levchenko, M. S. Kovalev, Yulia Gulina, O. E. Koval’chuk, А. А. Ионин
Abstract
Ultrafast visible-range excitation in natural diamond produces UV-VIS A-band photoluminescence with marginal zero-phonon line and intense regular multi-peak optical-phonon progression. The A-band photoexcitation can occur via band-center, center-center and band-band transitions, being related to two-photon (center-terminated), or interband three-photon and impact-ionization processes. Minor thermal pre-heating of the diamond (< 55 °C) demonstrates strong damping of A-band progression intensities with two different activation energies.
Topics & Concepts
PhotoexcitationDiamondMaterials scienceFemtosecondPhotoluminescenceExcited stateLuminescenceOptoelectronicsPhononLaserBand gapAtomic physicsOpticsPhysicsCondensed matter physicsComposite materialDiamond and Carbon-based Materials ResearchLaser Material Processing TechniquesAdvanced Fiber Laser Technologies