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(Color online) Transient anisotropic reflectivity of type Ib diamond for different sample orientations. Pump power is . Angle between pump and probe polarizations is kept at 45° while the sample is rotated normal to the surface. Traces are offset for clarity.
(Color online) Oscillatory part of the anisotropic reflectivity change of type IIa diamond for pump powers of 5, 20, and . Traces are offset for clarity. The inset shows the Fourier-transformed spectra of the oscillatory part.
(Color online) Initial amplitude of the coherent optical phonon of diamond obtained by the fitting of time-domain data to Eq. (1). Filled and open symbols represent types IIa (colorless) and Ib (yellow) diamonds, respectively. Lines represent linear fits.
Comparison of the optical phonon parameters obtained from time-domain and Raman measurements. Errors for time-domain measurements are for a single measurement; run-to-run errors for and are 0.14 and , respectively. The spectral resolution for Raman measurements is .
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