Investigation of free charge carrier dynamics in single-crystalline CVD diamond by two-photon absorption

Journal Article · Sun Nov 30 04:00:00 EST 2014 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2014V044N11ABEH015540· OSTI ID:22373339

Ivakin, E V; Kisialiou, I G ^[1]; Ralchenko, V G; Bolshakov, A P; Ashkinazi, E E ^[2]; Sharonov, G V ^[3]

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1. B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk (Belarus)
2. A M Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
3. A.N. Sevchenko Research Institute of Applied Physics Problems, Belarusian State University, Minsk (Belarus)

By using the methods of transient gratings (TGs) and induced absorption, we have studied the kinetics of plasma of free charge carriers (FCCs) created by the action of a picosecond laser pulse in two high-purity diamond single crystals synthesised from the gas phase. The gratings with different spatial periods have been excited at the wavelengths of 266 or 213 nm (above and below the fundamental absorption edge in diamond) and probed with continuous-wave radiation in the visible region. At the moderate FCC concentrations (∼7 × 10{sup 17} cm{sup -3}), the coefficient of ambipolar diffusion and the carrier recombination time of two crystals are 20.3 and 18.9 cm{sup 2} s{sup -1} and 30 and 190 ns, respectively. The increase in the carrier concentration up to 5 × 10{sup 19} cm{sup -3} reduces the TG lifetime. We have determined the conditions under which the relaxation of the grating of carriers leads to the formation of a thermal grating, with the amplitude sufficient for its experimental observation. (interaction of laser radiation with matter. laser plasma)

• OSTI ID: 22373339
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 11 Vol. 44; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
AMBIPOLAR DIFFUSION
CARRIER LIFETIME
CHARGE CARRIERS
CHEMICAL VAPOR DEPOSITION
CONCENTRATION RATIO
DIAMONDS
GRATINGS
LASER RADIATION
LASERS
MONOCRYSTALS
PHOTONS
PLASMA