We report emission from a bismuth doped chalcogenide glass which is flattened, has a full width at half maximum (FWHM) of 600 nm, peaks at 1300 nm and covers the entire telecommunications window. At cryogenic temperatures the FWHM reaches 850 nm. The quantum efficiency and lifetime were as high as 32% and 175 mus, respectively. We also report two new bismuth emission bands at 2000 and 2600 nm. ...

Silver sulfide nanocrystals and chalcogenide glasses (ChGs) are two distinct classes of semiconductor materials that have been exploited for new infrared technologies. Each one exhibits particular optoelectronic phenomena, which could be encompassed in a hybrid material. However, the integration of uniformly distributed crystalline phases within an amorphous matrix is not always an easy task. I...

We consider the formation of forked diffraction gratings on surface a multilayer structure based chalcogenide glass semiconductors As2S3 and a-Se is. The distribution electric field components upon interference beams with different polarization states is analyzed theoretically. possibility direct holographic writing “forked” demonstrated. parameters vortex laser generated by microrelief formed ...

Bulk glass formation occurs over a very small part of phase space, and ‘good’ glasses (which form even at low quench rates ∼10 K/sec) select an even smaller part of that accessible phase space. An axiomatic theory provides the physical basis of glass formation, and identifies these sweet spots of glass formation with existence of rigid but stress-free networks for which experimental evidence is...

The concept of fragility has been used widely to characterize the temperature dependence of the viscosity of glass forming liquids. According to a model proposed by one of the authors, the fragility is determined by the relaxation of structural units that form the melt, and is described in terms of the bond strength, coordination number and their fluctuations. In the present contribution, the m...

This study reports on the employment of the interference lithography (IL) technique, using photoresist based on the chalcogenide glass (ChG) films, for fabrication of one-dimensional (gratings) and two-dimensional (arrays) periodic plasmonic structures on the surface of glass plates. The IL technique was optimized for patterning of the Au and Al layers and formation of gratings and arrays with ...

Vacuum evaporated films of GexSe80-xPb20 have been characterized by using optical spectroscopy (especially transmission and absorption spectra). The chalcogenide glass of GexSe80-xPb20 has been prepared by melt quenching technique. Thin films of GexSe80-xPb20 are deposited by vacuum thermal evaporation technique on highly clean glass substrates and their optical properties such as refractive in...