Department of Physics

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Subject: search.filters.subject.Glasses

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    Plasmon Assisted Quantum Cutting in Rare Earth Doped Glasses
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2023) Ahmad Wadood; CIIT/SP22-RPH-016/LHR; Dr. Junaid Amjad; LHR TP 8780
    Borophosphate based glass materials having rare earth, shows promising optical photonic and biomedical applications. Here in the current report, Ce3+ ions and AgCl are co-doped in Borophosphate glass and new hybrid glasses with different properties were prepared by using melt-quenching method. The intensities of 4f intrabands transitions of rare earth ions changed by the addition of metallic Ag nanopartciles (NPs). Photoluminescence spectroscopy of Borophosphate glass co doped with Ce3+ ions and Ag nanoparticles revealed the dynamic decay of Ce3+ ions due to the influence of Ag plasmonic nanoparticles. The optical properties of these glasses were characterized by different methods such as UV-Vis, Raman, PL (photoluminescence), FTIR and XRD. The results show the absorption and luminescence spectroscopy and the excited state lifetime that gives the optical properties of the glass.
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    Mixed Former Effect on the Photo Physical Properties of Phospho Tellurite Based Glasses
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2022) Tayyaba Yousaf; CIIT/FA20-RPH-005/LHR; Dr. Junaid Amjad; LHR TP 7970
    Phospho-Tellurite glass was prepared earth to study the network former mixing effect in the prepared glass. The glass was prepared by melt quench technique in an electrical furnace at a temperature of 1100 °C. Glass were made in palettes of 2mm in size. The prepared glass was then characterized by using Raman, FTIR and UV- VIS (Reflectance) Spectroscopy. Raman Spectra revealed that phospho-tellurite are suitable for Raman broadband Amplifiers. FTIR revealed the functional groups of glass and verified the presence of non-bridging oxygen atoms. Whereas UV-VIS (Reflectance) Spectra was used to calculate the band gap of prepared glass sample. When UV-Vis spectrum will be examined via various wavelength it will show the absorbance of one or more sample component. The crystalline phase available in material will be recognized by XRD technique and it also discloses the chemical structure. Absorption data will assist the calculation of band gap. To compute the spectroscopic and electronic properties we also aspire to achieve the computational simulation that will yield further awareness.