Fano-type effect in hydrogen-terminated pure nanodiamond

Abstract

Two novel properties, unique for semiconductors: a negative electron affinity [1-2], and a high p-type surface electrical conductivity [3-4], were discovered in diamond at the end of the last century. Both properties appear when the diamond surface is hydrogenated. A natural question arises: is the influence of the surface hydrogen on diamond limited only to the electrical properties? Here, we report the first observation of a transparency peak at 1328 cm-1 in IR absorption of hydrogen-terminated pure (undoped) nanodiamonds. This new optical property is ascribed to Fano-type destructive interference between zone-center phonons and free carriers (holes) appearing in the near-surface layer of hydrogenated nanodiamond. Our work opens the way to exploring the physics of electron-phonon coupling in undoped diamonds and promises the application of the H-terminated nanodiamonds as a new optical material with an induced transparency in IR optical range.

15 pages, 7 figures

References in corpus (2)

• The Quantum Internet
• Surface electronic properties of diamond

Cited by in corpus (5)

• Size-dependent thermal stability and optical properties of ultra-small nanodiamonds synthesized under high pressure
• Temperature dependence of Fano resonance in nanodiamonds synthesized at high static pressures
• Enhanced plasmonic absorption in spontaneous nanocomplexes of metal nanoparticles with surface modified HPHT nanodiamonds
• On Fano effect in IR spectra of hydrogenated nanodiamonds
• Diamond phase in space and the possibility of its spectroscopic detection