Browsing by Author "Lenka, Chandan Kumar"

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    Synthesis, Crystal Growth And Characterization Of Dmapnp Crystals For NLO Applications
    (Department of Physics, NITS, 2022) Lenka, Chandan Kumar
    Crystals are beautiful creation of nature that attract us human beings since ancient times. We always try to grow crystals artificially in laboratories. The foundation work on different crystallization techniques has already been deduced in 18th and 19th century but it gets a great stimulation after invention of laser and by we get a new field in optics known as non linear optics which can solve many problems in today’s world. Non-linear optics originates after witnessing the doubling of frequency by applying a laser for the first time. However, now, it has a very high demand for photonics. NLO materials have the properties to gain, preserve, process, and transfer data as semiconductors work. However, we use light here, which increases the transfer speed or other workings. For this reason, the demand for NLO materials increases in telecommunication, optical switching, optical computing, extensive data storing and many other things. This necessitates the search for new NLO materials with distinct properties to meet our requirements. The compound is classified as organic, inorganic, semi-organic, or organometallic in this search. We are primarily interested in the organic substance 4-dimethylamino pyridinium 4-nitrophenol (DMAPNP), which was generated using the slow cooling technique of crystal development. The formed crystal is next examined with powdered XRD to determine the lattice characteristics. The crystal is then subjected to FTIR and FT-Raman spectroscopy to determine the functional group present, as well as vibrational mode analysis. After that, we can see its transparency in the UV-Visible portion of the electromagnetic spectrum by utilizing the UV-Vis absorption spectrum. Finally, the efficiency of the produced material for SHG or its optical nonlinearity is determined by characterizing the crystal for SHG using the Kurtz-Perry powder technique.