ﷺ
میری سانسیں ہوں مشک بار اے کاش
راہِ طیبہ کا ہو غبار اے کاش
جس جگہ قدسی ایک بار آئیں
ہم وہاں جائیں بار بار اے کاش
اُنؐ کی دہلیز پر جھکا کر سر
ہم بھی بن جائیں تاجدار اے کاش
اُنؐ کے قدموں سے ہم لپٹ جائیں
پہنچیں جس وقت پل سے پار اے کاش
مجھ سے کہتے ہیں روز و شب میرے
نعت ہی ہو ترا شعار اے کاش
Allah has created human being and gave him the power of intellectual understandings. To utilize and make positive use of this Allah sent Holy books for guidance. While, keeping the sequence of these books and the historical evolution of human mind, one can easily recognize the symmetrical progress in both. Human starts living in caves and through his intelligence created homes to live, tools to gain meal, and so on, till todays growth. As far as, evolution of Holy books is considered, Scriptures were revealed in different portions as human at that stage couldn’t write or store on pages or another source. Old Testament was revealed earlier. It is combination of Torah, Psalms and other books. In the context of Islam, Torah was the first book revealed on Hazrat Mosa, in which commandments were given as per the level of Bani Israel. Afterwards, Psalms, containing poetic way inspires Bani Israel after the Torah and the Bible Last Holy book in the generation of Israel, comprises of observational and experiential way, as required in that era. Holy Quran, compiled and final version of all the past version, is summary and elemental book. In which, descriptive, observational, experiential, poetic, logical, argumentative and comprehensive technique are present. These all shows, ultimate intellectual growth of human is being address in Holy Quran. As Human is now intellectually at its peak so the teaching and techniques used are at highest level of literature, showing the step by step evolution and association of Holy books with Human being.
Li2O–Gd2O3–MO–B2O3 glasses, where MO=Bi2O3, BaO doped with different rare earth ions (Sm3+, Dy3+, Eu3+ and Ce3+) have been synthesized by conventional melt quenching technique for the applications of solid state lightning devices (color LEDs), lasers and scintillation detectors. The developed glass samples have been investigated and characterized through their physical (density, molar volume, refractive index and optical energy gap, etc.), structural (X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR)) and optical (absorption, excitation, emission and decay) properties. The various spectroscopic parameters such as, Judd-Oflet (JO) intensity parameters (Ωλ=2,4,6), radiative lifetime (τR), transition probability (AR), branching ratio (βR), quantum efficiency (η), non-radiative relaxation rates (WNR), effective bandwidths (∆λeff), stimulated emission cross-section σ(λp) and CIE color coordinates for the present thesis have been calculated and analyzed by using various theoretical models and different mathematical relations, which shows the same trend for all developed glass samples. The structural properties of the developed glasses have been investigated through XRD and FTIR spectra. The optical band and JO intensity parameters have been evaluated from optical absorption spectra. The optical and luminescence properties of the prepared glasses have been study with the help of absorption, transmittance, and photoluminescence and X-ray luminescence spectrum. Lifetime of all the developed glasses have been found to decrease with increase in concentration of rare earth ions. The energy transfer mechanism has been explained by using InokutiHirayama (IH) model, which shows better fitting for S=6, which is dipole-dipole interaction is dominant in the present glass samples. From the color coordinates values of LGBiBSm and LGBaBSm glasses emits orange light while LGBiBDy, LGBaBDy and LGBiBEu glasses emits white and red light, respectively. From the obtained results, LGMOBSm, LGMODy, and LGBiBEu glasses could be the potential hosts for the light emitting diodes and laser applications. While LGBaBCeF glasses might be used for the neutron detection.