When a beam of broadband light wave is incident on FBG, the optical wave with the wavelength satisfying Bragg equation after modulation by Bragg grating is coupled by Bragg grating to the inverse transmission mode [20] and form Bragg equation of
Bragg reflection wave:
The optical microscopy image in Figure 1(a) was taken in natural lighting conditions, revealing the iridescent-dependent
Bragg reflection. We used the field-emission scanning electron microscopy (FESEM) to investigate the crystalline structure of the c-SCPhCs on the WLEDs.
In case of periodicity perturbation, the
Bragg reflection becomes more complicated and gains great practical value [5].
[16.] Park, J., "High order plasmonic
Bragg reflection in the metal-isulator-metal waveguide Bragg grating," Optics Express, Vol.
This negative effective group of refraction may be caused by wave interference from
Bragg reflection.
Sensor array codes address with different
Bragg reflection wavelength.
If, for example [[tau].sub.0] = 0.1 [phi]s then in the case of
Bragg reflection with b = [[gamma].sub.0]/ [[gamma].sub.h] = -2, the distance [L.sub.D] [approximately equal to] 64 cm, and in the symmetric Laue case generally [L.sub.D] [approximately equal to] 8 cm (here and further consider the reflection Si (220), [lambda] = 0.154 nm).
Precious opal is composed of equallysized silica spheres in a closely-packed lattice and displays variable colours with the angle of observation, depending on the diameter of the spheres, which may vary between 150 and 300 nm (the characteristic opal iridescence is caused by
Bragg reflection from the lattice planes, similar to that of Denisyuk volume reflection holograms and Lippmann photographs).
The [lambda]/3 peak is minimized using
Bragg reflection from polycrystalline bismuth.
Crystal size distribution drastically decreases at
Bragg reflection, 2[theta] = 28.69[degrees], with an increase in Pani content.
Further, we can maximize d to 0.314 nm by choosing the {111}
Bragg reflection for the interferometer (hence [lambda] = 0.514 nm) to further enhance [PHI] and reduce [DELTA][PHI]/[PHI].
The integrated intensity for a magnetic
Bragg reflection is given (for a simple collinear magnetic structure) by (61)