A5056889079- Quantum Dots Synthesis And Properties
- Semiconductor Quantum Structures and Devices
- ZnO doping and properties
- Graphene research and applications
- Chalcogenide Semiconductor Thin Films
- Spectroscopy and Quantum Chemical Studies
- Carbon Nanotubes in Composites
- Advanced biosensing and bioanalysis techniques
- GaN-based semiconductor devices and materials
- Chemical and Physical Properties of Materials
- Advancements in Battery Materials
- Nonlinear Optical Materials Research
- DNA and Nucleic Acid Chemistry
- Semiconductor materials and devices
- Graphene and Nanomaterials Applications
- Photochemistry and Electron Transfer Studies
- Free Radicals and Antioxidants
- Quantum and electron transport phenomena
- Advanced Semiconductor Detectors and Materials
- Acoustic Wave Resonator Technologies
Manav Rachna International Institute of Research and Studies
2019-2024
Jaypee Institute of Information Technology
2012-2015
In this work we investigate some optical properties of semiconductor ZnO spherical quantum dot embedded in an amorphous SiO2 dielectric matrix. Using the framework effective mass approximation, have studied intraband S-P, and P-D transitions a singly charged dot. The are investigated terms linear nonlinear photoabsorption coefficient, change refractive index, third order susceptibility oscillator strengths. parabolic confinement potential electron these parameters with variation size, energy...
The second harmonic generation (SHG) and the sum frequency (SFG) processes are investigated in conduction band states of singly charged ZnO quantum dot (QD) embedded HfO2, AlN matrices. With two optical fields ωp ωq incident on dot, we study variation with order nonlinear polarization resulting SHG SFG, through electric dipole quadrupole interactions pump electron dot. We obtain enhanced value susceptibility compared to bulk. effective mass approximation finite confining barrier is used for...
Electronic transitions in the quantum confined states conduction band of spherical ZnO semiconductor dot are studied. Photoabsorption spectra and oscillator strengths have been obtained for various sizes using effective mass approximation. Electric quadrupole effect has included addition to electric dipole effect. The nonlinear contribution photoabsorption also Results transition energies found be good agreement with available experimental data.
In this paper, we investigate the linear and nonlinear photoabsorption processes in conduction-band-confined levels of a singly charged ZnO quantum dot (QD) surrounded by HfO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> AlN matrices. We also photoelectric process which conduction band electron ejects from to vacuum. use effective mass approximation with finite barrier height at dot-matrix interface. consider self-energy local field...
In the present study, we applied a sonication based method to achieve graphene oxide (GO) and reduced (r-GO) nano-structures. X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM) x-ray absorption near edge structure (XANES) measurements were characterize samples. XRD, TEM results demonstrate significant crystalline nature of GO nano sheets. On other hand, r-GO sample shows poor crystallinity with large number...
Abstract We present a comprehensive first-principles study of the electronic structure graphene sheet with periodic vacancy. report structural, electronic, and magnetic properties vacancy that possess 48 C & 28 H atoms. Computational analysis based on density functional theory predicts can modulate sheet. Results show vacancies lead to manipulation band gap could be utilized tailor Also, it is found that, non-magnetic in nature.
We study Iodine substitution effect on the photophysical properties of coumarin 120. Within framework density functional theory we investigate structural, charge transfer and gas phase absorption spectra. found that Absorption spectra iodine substituted 120 shift towards higher frequency as compared to