Transient Absorption Phenomena in Synthetic HPHT and CVD Diamonds for a Fast Timing in Nuclear Instrumentation

Abstract

We investigate the transient absorption phenomena in synthetic diamonds obtained by High Pressure High Temperature (HPHT) and Chemical Vapor Deposition (CVD) methods. The aim of our study is to search inorganic crystalline media combining ionizing radiation and investigate their detecting properties and non-linear absorption of ultra-short laser pulses. The pump-probe technique with 140 fs laser pulses was used for the investigations.

Early dynamics of the emission of solvated electrons from nanodiamonds in water

“…Nevertheless, the overall TA spectral fingerprint and blue shift over time resembles the NaI signature more than that of the intrinsic electron dynamics in diamond films. 30 We therefore attribute the TA signal to the signature of solvated electrons. It should be noted that the emission of solvated electrons under ionizing radiation was already demonstrated on the same type of ND-H. 12 We attempted time-resolved photoemission spectroscopy (PES) to gain further insight into the electronic states of the solvated electrons.…”