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Non-Linear Optical Hydrogen Phosphate Crystals: Growth and Characterization.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Non-Linear Optical Hydrogen Phosphate Crystals: Growth and Characterization./
作者:	Mahadik, Ashwini Sambhaji.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	217 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-06, Section: B.
Contained By:	Dissertations Abstracts International83-06B.
標題:	Physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28867075
ISBN:	9798759947509

Non-Linear Optical Hydrogen Phosphate Crystals: Growth and Characterization.
Mahadik, Ashwini Sambhaji.

Non-Linear Optical Hydrogen Phosphate Crystals: Growth and Characterization. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 217 p.

Source: Dissertations Abstracts International, Volume: 83-06, Section: B.

Thesis (Ph.D.)--Maharaja Sayajirao University of Baroda (India), 2021.

This item must not be sold to any third party vendors.

The thesis entitled "Non-Linear Optical Hydrogen Phosphate Crystals: Growth and Characterization", representing an elaborated report of the author's research work, will be covering the following six chapters followed by suggestions for future work.Chapter-1: Introduction of Crystal Growth and Non-linear OpticsThis chapter provides a broad overview of the topic, crystal growth. The crystal growth section begins with a quick explanation of crystal growth before focusing on solution growth techniques for single crystal growth, such as slow evaporation, slow cooling, and so on, as well as the benefits and drawbacks of such procedures. The sub-section on non-linear optics provides an overview of non-linear optical phenomena, non-linear optical processes, and types of non-linear optical crystals. The relevance of various amino acids doped non-linear optical crystals is also discussed in this chapter. The author also provides a range of the literature on studies done in the last five years for amino acids doped hydrogen bonded KDP family crystals.Chapter-2: Experimental TechniquesThe many experimental approaches utilised to characterise the produced crystals are briefly described in this chapter. Powder X-ray diffraction (Powder XRD), Thermal Studies (TGA/DTA), Dielectric Analysis, Impedance Spectroscopy, Modulus Spectroscopy, Fourier Transform Infrared Spectroscopy (FT-IR), UV-Visible (UV-Vis) Spectroscopy,Photoluminescence Study (PL), Relative Second Harmoni Generation (SHG) Efficiency are all examples of these techniques.Chapter-3: Effect of L-Cysteine on Structural, Thermal, Electrical and Optical Properties of Potassium Dihydrogen Phosphate (KDP)This chapter represents a slow solvent evaporation technique at room temperature to grow and characterise pure and varied weight percentage (1 mol% and 2 mol%) L-Cysteine doped KDP crystals. Powder XRD spectra of pure and L-Cysteine doped KDP crystals revealed tetragonal symmetry, single-phase nature, and slight diffraction peak shifting, as well as minor changes in unit cell parameters. According to the TGA/DTA analysis, L-Cysteine added to pure KDP crystal improves its thermal stability; however, it decomposes faster than pure KDP crystal. The dielectric study reveals that L-Cysteine doping in KDP crystals reduces its electrical characteristics, such as dielectric loss, dielectric constant and conductivity, making it acceptable for microelectronic applications. According to FT-IR spectroscopy, the doping of L-Cysteine in KDP crystal causes the absorption peak to shift, and the force constant was also calculated for O-H bond. The PL emission spectra of pure and doped KDP crystals show that L- and D-defects exist in doped and pure crystals. The electron and hole recombination at various photon energies has also been observed in PL emission spectra. The existence of Stokes shift and vibration relaxation phenomena indicates that doping has caused defects in KDP. In the UV-Visible and IR regions, the doped crystals have excellent transmittance. With doping levels of 1 mol% and 2 mol%, L-Cysteine in KDP crystals improves the bandgap from 3.41 eV to 4.40 eV and 4.50 eV, respectively, making it more appropriate for SHG application. The SHG efficiency of L-Cysteine doped KDP (1 mol%) crystal is two times that of pure KDP, implying that it could be used in frequency conversions and other applications. Thus, L-Cysteine doping improves the linear and non-linear optical (NLO) performance of KDP crystals, indicating that the doped crystals are promising candidates for diverse NLO applications.Chapter-4: Effect of L-Arginine on Structural, Thermal, Electrical and Optical Properties of Potassium Dihydrogen Phosphate (KDP)The pure and L-Arginine (1 mol% and 2 mol%) doped KDP crystals were successfully grown at room temperature with a slow evaporation technique. The obtained crystals were highly transparent. Powder XRD analysis revealed crystalline perfection and no substantial peak shifting, suggesting that the dopant L-Arginine atoms/molecules are accommodated adequately in the KDP crystal structure. The dielectric constant and dielectric loss decrease with applied angular frequency for all crystals due to electric dipole's inability to comply with the applied field and lattice defects produced within crystals. The a. c conductivity of doped KDP crystals is observed to be enhanced compared to pure KDP crystals suggesting the generation of defects in the lattice. From Jonscher's plots, we observed that L-Arginine doped KDP crystals follow the Correlation Barrier Hopping (CBH) conduction mechanism. Based on the conduction process taking place, we calculated the values of binding energy (Wm) and density of state at Fermi level [N(Ef)]. The incorporation of L-Arginine in the KDP lattice is confirmed by amino acid functional groups in the doped KDP spectra. Minor structural changes in the KDP crystalline matrix are caused by L-Arginine doping, evidenced by small shifts in vibrational frequencies in doped KDP crystal's FT-IR spectra. The bandgaps of L-Arginine (1 mol% and 2 mol%) doped. (Abstract shortened by ProQuest).

ISBN: 9798759947509Subjects--Topical Terms:

516296
Physics.
Subjects--Index Terms:

Crystals

Non-Linear Optical Hydrogen Phosphate Crystals: Growth and Characterization.
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500 $a Source: Dissertations Abstracts International, Volume: 83-06, Section: B.
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502 $a Thesis (Ph.D.)--Maharaja Sayajirao University of Baroda (India), 2021.
506 $a This item must not be sold to any third party vendors.
520 $a The thesis entitled "Non-Linear Optical Hydrogen Phosphate Crystals: Growth and Characterization", representing an elaborated report of the author's research work, will be covering the following six chapters followed by suggestions for future work.Chapter-1: Introduction of Crystal Growth and Non-linear OpticsThis chapter provides a broad overview of the topic, crystal growth. The crystal growth section begins with a quick explanation of crystal growth before focusing on solution growth techniques for single crystal growth, such as slow evaporation, slow cooling, and so on, as well as the benefits and drawbacks of such procedures. The sub-section on non-linear optics provides an overview of non-linear optical phenomena, non-linear optical processes, and types of non-linear optical crystals. The relevance of various amino acids doped non-linear optical crystals is also discussed in this chapter. The author also provides a range of the literature on studies done in the last five years for amino acids doped hydrogen bonded KDP family crystals.Chapter-2: Experimental TechniquesThe many experimental approaches utilised to characterise the produced crystals are briefly described in this chapter. Powder X-ray diffraction (Powder XRD), Thermal Studies (TGA/DTA), Dielectric Analysis, Impedance Spectroscopy, Modulus Spectroscopy, Fourier Transform Infrared Spectroscopy (FT-IR), UV-Visible (UV-Vis) Spectroscopy,Photoluminescence Study (PL), Relative Second Harmoni Generation (SHG) Efficiency are all examples of these techniques.Chapter-3: Effect of L-Cysteine on Structural, Thermal, Electrical and Optical Properties of Potassium Dihydrogen Phosphate (KDP)This chapter represents a slow solvent evaporation technique at room temperature to grow and characterise pure and varied weight percentage (1 mol% and 2 mol%) L-Cysteine doped KDP crystals. Powder XRD spectra of pure and L-Cysteine doped KDP crystals revealed tetragonal symmetry, single-phase nature, and slight diffraction peak shifting, as well as minor changes in unit cell parameters. According to the TGA/DTA analysis, L-Cysteine added to pure KDP crystal improves its thermal stability; however, it decomposes faster than pure KDP crystal. The dielectric study reveals that L-Cysteine doping in KDP crystals reduces its electrical characteristics, such as dielectric loss, dielectric constant and conductivity, making it acceptable for microelectronic applications. According to FT-IR spectroscopy, the doping of L-Cysteine in KDP crystal causes the absorption peak to shift, and the force constant was also calculated for O-H bond. The PL emission spectra of pure and doped KDP crystals show that L- and D-defects exist in doped and pure crystals. The electron and hole recombination at various photon energies has also been observed in PL emission spectra. The existence of Stokes shift and vibration relaxation phenomena indicates that doping has caused defects in KDP. In the UV-Visible and IR regions, the doped crystals have excellent transmittance. With doping levels of 1 mol% and 2 mol%, L-Cysteine in KDP crystals improves the bandgap from 3.41 eV to 4.40 eV and 4.50 eV, respectively, making it more appropriate for SHG application. The SHG efficiency of L-Cysteine doped KDP (1 mol%) crystal is two times that of pure KDP, implying that it could be used in frequency conversions and other applications. Thus, L-Cysteine doping improves the linear and non-linear optical (NLO) performance of KDP crystals, indicating that the doped crystals are promising candidates for diverse NLO applications.Chapter-4: Effect of L-Arginine on Structural, Thermal, Electrical and Optical Properties of Potassium Dihydrogen Phosphate (KDP)The pure and L-Arginine (1 mol% and 2 mol%) doped KDP crystals were successfully grown at room temperature with a slow evaporation technique. The obtained crystals were highly transparent. Powder XRD analysis revealed crystalline perfection and no substantial peak shifting, suggesting that the dopant L-Arginine atoms/molecules are accommodated adequately in the KDP crystal structure. The dielectric constant and dielectric loss decrease with applied angular frequency for all crystals due to electric dipole's inability to comply with the applied field and lattice defects produced within crystals. The a. c conductivity of doped KDP crystals is observed to be enhanced compared to pure KDP crystals suggesting the generation of defects in the lattice. From Jonscher's plots, we observed that L-Arginine doped KDP crystals follow the Correlation Barrier Hopping (CBH) conduction mechanism. Based on the conduction process taking place, we calculated the values of binding energy (Wm) and density of state at Fermi level [N(Ef)]. The incorporation of L-Arginine in the KDP lattice is confirmed by amino acid functional groups in the doped KDP spectra. Minor structural changes in the KDP crystalline matrix are caused by L-Arginine doping, evidenced by small shifts in vibrational frequencies in doped KDP crystal's FT-IR spectra. The bandgaps of L-Arginine (1 mol% and 2 mol%) doped. (Abstract shortened by ProQuest).
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