Correction to: Photoluminescence Characteristics of YAG:Ce,Gd Based Phosphors with Different Prehistories

Russian Physics Journal - There was a misprint in the third author’s name. It should read Yangyang Ju instead of Yu Yang yang.     

Degree of coherence and dimensions of the generation region of powder lasers

A degree of coherence of powder-laser radiation of 10–20% is estimated by the magnitude of the image contrast for a speckle, although cases are recorded where it attains 40–50%. It is found that as the average speckle intensity increases, the contrast decreases. It is established that the minimum, dimensions of the generation region in powders are 20–30 μm. Cases of existence of several generation centers simultaneously are noted. An attempt to interpret the results obtained is made. Institute of Radio Engineering and Electronics, Russian Academy of Sciences, 11, Mokhovaya St., Moscow, 103907. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 5, pp. 780–786, September–October, 1998.     

New composite material based on polycarbonate and long-persistent phosphor

Spectral-energy and inertial properties of very long-persistent (> 10 h) phosphor SrAl₂O₄:Eu²⁺, Dy³⁺ were studied using semiconductor light-emitting diodes and other optical radiation sources in the blue and near-ultraviolet regions. The light store accumulated in this phosphor (up to 1 · 10¹⁶ photon/cm²) was estimated and its luminescence kinetics was discussed. The prospects of its application, including phosphor grain introduction into films, were considered.     

Thermoluminescence of yttrium oxysulfide activated with europium and other rare earths

Journal of Applied Spectroscopy -     

A Cathodoluminescent Screen of Columnar Structure for Field Emission Displays

We have suggested and implemented a method of creation (growing) of sublimatescreens formed by singlecrystal luminophor columns which are perpendicular to an amorphous (e.g., glass) substrate. The diameters of the columns are 3–5 m, the height 7–10 m. The columnar singlecrystal structure of the screen ensures the high light yield and radiation color needed for field emission displays. It is possible to select the growing regime so that the columns are very closely spaced (1–2 m). The gaps can be filled with a conducting opaque material that increases the contrast of the screen and improves their electrical conductivity.