Optical scattering in glass ceramics

Red photonic glasses and confined structures

“…As far as concerns scattering attenuation, it is important to note that the transparency of glass-ceramics is higher than that expected from the theory of Rayleigh scattering. Edgar et al measured the optical extinction coefficient for fluorozirconate glass-ceramics containing BaCl 2 nanoparticles and found that glass-ceramics were about a factor of six more transparent than predicted by Rayleigh scattering theory [27]. Looking at the general criteria given above, the main reason of such behavior appears to be related to the spatial arrangement and the consequent interference pattern of the scattered light [26].…”

Influence of blue-light polarization on light scattering in nanocrystal luminescent glass for white light-emitting-diodes

“…Then the turbidity for the luminescent glass with nano-crystal number density N can be calculated with Eqs. (12)- (14) and (15) (18) show that no matter the incident light is polarized or not, the turbidity for nano-crystal luminescent glass has k 8 R 10 dependence. With Eqs.…”

“…Specifically, Hendy [13] found k 8 R 7 dependence of the scattering turbidity, where k and R are the wave-number and the average crystal radius respectively. Edgar [14,15] proposed a light scattering model in glass ceramics based on the core-shell particle model and Rayleigh-Debye approximation, revealing a series of abnormal phenomena involved in this kind of glass ceramics.However, only the non-polarized incident light has been considered in all these approaches. Indeed, the polarized light emitted from the InGaN/GaN light emitting diodes (LEDs) has been proposed and experimentally confirmed by Schubert group [16] , which is of importance in many applications such as sensing, imaging and liquid crystal backlighting [17] .…”

“…Specifically, Hendy [13] found k 8 R 7 dependence of the scattering turbidity, where k and R are the wave-number and the average crystal radius respectively. Edgar [14,15] proposed a light scattering model in glass ceramics based on the core-shell particle model and Rayleigh-Debye approximation, revealing a series of abnormal phenomena involved in this kind of glass ceramics.…”

“…In this paper, taking into account of the incident polarization light, we employ Rayleigh-Debye formula to obtain the scattering turbidity with wavelength of incident light, radii and refractive index of nano-crystals. We assume that the nanometer phosphor particles are embedded in parent glass uniformly in spherical core-shell structure [14,15] , which has been precipitated by nucleation and grain growth with melt cooling-heat-treating procedure. Upon nucleation, the crystallite atoms and the primitive atoms are located in the grown crystal and then mutually diffuse within a certain volume.…”