Bragg diffraction grating

Figure B2.1.1 Femtosecond light source based on an amplified titanium-sapphire laser and an optical parametric amplifier. Symbols used P, Brewster dispersing prism X, titanium-sapphire crystal OC, output coupler B, acousto-optic pulse selector (Bragg cell) FR, Faraday rotator and polarizer assembly DG, diffraction grating BBO, p-barium borate nonlinear crystal.

Fia. 206. Formation of the imago of a diffraction grating. Paths of light rays (Bragg, 1929 b). 

Fig. 1. The experimental set-up proposed to test neutrality of lithium atom is based on a Mach-Zehnder atom interferometer working in the Bragg configuration. Gi, G2, G3 are the three diffraction gratings and the detector is placed in front of one of the two complementary exits. The capacitor of length Lc extends from 2 = zm to z = zout-Some plates defining the zero potential in a symmetrical way are not represented...

Figure 3. Experimental geometry for dephasing measurements by three-pulse scattering technique. Pump pulses (1 and 2) produce a grating response that diffracts probe pulse (3) into two orders. In grating experiments described in Section III (nuclear phase coherence), t = 0 and probe pulse is incident at the phase-matching angle for Bragg diffraction into only one order.

The seminal event in the foundation of solid-state science was the realization by von Laue that the ordered strucmre of atoms in a crystalline solid might act as a diffraction grating for X-rays. The corresponding formula by Bragg,... 

Crystals correspond to a diffraction grating in three dimensions. The unit cells now have axes a, b and c and the Miller indices of a particular plane are h, k, 1. The condition for diffraction is understood from Bragg s demonstration that scattering from a series of planes with Miller indices h, k, I was equivalent to reflection from those same planes. If the angle between the plane and the incident beam is 0, then for reflected beams, initially in-phase, to also be in-phase after reflection, the extra distance travelled by the reflected beam must be a whole number of wavelengths, i.e. eqn. (4.2) should hold (Figure 4.7) ... 

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