Figure 9
Logarithmic plots of the anti-Stokes intensity as a function of the sample periodicity ΛK versus emission angle β.
The plots and graphs are normalized to the minimum in (c). (a) and (b) Pump (green) and Stokes (red) beam propagate into the same preferred direction. (c) The propagation direction of the Stokes beam is inverted. Depending on the sample periodicity distinct anti-Stokes radiation angles are observed. (d) Visualization of a periodic sample. The dotted blue line indicate the phase-matching angle(s). The graphs above each plot represents the sum along vertical lines. If anti-Stokes emission is collected in forward and backward direction with βmax ≥ 60°, then two subsequent experiments with condition equal to those assumed for (a),(b) and (c) will provide information about sample z-wavelength beginning from a homogeneous sample down to maximum spatial frequency of 1/585 nm. Calculation parameters: λp = 1169.6 nm, λS = 1754.4 nm, λaS = 877.2 nm, θp;max = 50°, θp;min = 48° and θS = 4°.
