A5016420797- Laser-Matter Interactions and Applications
- Nonlinear Optical Materials Research
- Advanced Fiber Laser Technologies
- Spectroscopy and Quantum Chemical Studies
- Advanced Chemical Physics Studies
- Nonlinear Optical Materials Studies
- Mass Spectrometry Techniques and Applications
- Spectroscopy and Laser Applications
- Optical and Acousto-Optic Technologies
- Supercapacitor Materials and Fabrication
- Asymmetric Synthesis and Catalysis
- Laser-Plasma Interactions and Diagnostics
- Inorganic and Organometallic Chemistry
- Photorefractive and Nonlinear Optics
- Solid-state spectroscopy and crystallography
- Chemical Synthesis and Reactions
- Surface Chemistry and Catalysis
- Magnetic Properties and Synthesis of Ferrites
- Graphene research and applications
- Quantum Dots Synthesis And Properties
- Synthetic Organic Chemistry Methods
- Carbon and Quantum Dots Applications
- Nanocluster Synthesis and Applications
- Graphene and Nanomaterials Applications
- Organic Chemistry Cycloaddition Reactions
Istituto di Fotonica e Nanotecnologie
2018-2023
ELI-HU Research and Development Non-Profit
2022-2023
Politecnico di Milano
2018-2023
Central University of Kerala
2020
Dhanalakshmi Srinivasan Group of Institutions
2014-2015
Government Medical College
2010
Newcastle University Medicine Malaysia
2010
University of Madras
1979-1984
Chiral molecules are widespread in nature, playing a fundamental role bio-chemical processes and the origin of life itself. The observation dynamics chiral is crucial for understanding control activity photo-excited states. One most promising techniques study systems time-resolved photoelectron circular dichroism (TR-PECD), which offers an intense sensitive probe vibronic geometric molecular structure as well electronic structures, their evolution on femtosecond timescale. However, non-local...
Post-compression of 12-fs laser pulses with multi-TW peak power from an optical parametric chirped pulse amplification (OPCPA) system was performed by using a single thin fused silica plate in vacuum. By optimizing the input both spatial and temporal domains, after compression customized mirrors, we achieved as short 3.87 fs, combination 12-mJ energy. The spatio-spectral quality post-compressed thoroughly analyzed. generated 1.4-cycle pave way for next generation attosecond particle...
Abstract We present a robust, three-stage optical parametric amplifier driven by Ti:Sapphire ultrafast laser system that implements passive carrier-envelope phase stabilization and directly generates five-cycle mid-IR pulses dispersion compensation. The source is based on potassium titanyl arsenate crystals exploits intra-pulse difference-frequency seed generation in the mid-IR. This will be particularly suited for applications strong-field physics, such as high order harmonic photoelectron...
Organic non-linear optical Benzimidazolium salicylate (BISA) single crystals have been harvested from methanol solution by slow evaporation method. The grown belong to the monoclinic crystal system with space group P21/c. Good crystalline nature of BISA was confirmed PXRD. FTIR spectrum analysis affirms presence functional groups in crystal. From UV‒Vis-Absorption spectrum, lower cut-off wavelength (356 nm) and its energy band gap linear refractive index were calculated. Luminescence...
Spectral focusing of the recolliding electron in high-order harmonic generation driven by two-color fields is shown to be a powerful tool for isolating and enhancing hidden spectral features target under study. In previous works we used this technique probing multi-electron effects xenon compared our experimental results with time-dependent configuration-interaction singles calculations. We demonstrate here that can exploited reconstructing enhancement factor giant dipole resonance discuss...
Surface Plasmon Resonance (SPR) is an attracting property of certain transition metals when they are synthesized in nano-range giving rise to promising optical applications. However, most SPR and associated applications limited the noble metal nanoparticles, which limits their potential due high production cost. We report surface plasmon resonance copper-copper oxide core-shell quantum dots via chemical route studied by using UV-Visible spectrophotometry. Tuning plasmonic with respect...
We experimentally studied the formation of CH(A) radicals in butane seeded plasma generated with chirp-controlled ultrashort laser pulses (\(\sim 760 \, \mu \text{J}/\text{pulse}\), 890 nm, 1 kHz, 8 fs). The focused beam high peak intensity 10^{14} - 10^{16} \text{W/cm}^2\)) caused Coulomb explosion (CE). time dependent emission spectra were observed Fourier-transform Visible spectroscopy (FTVis) step-scan method. average signal decreased chirp Ar\(^+\) > C\(_2\) H-\(\alpha\) \(\sim\) order...
Chiral molecules are widespread in nature, playing a fundamental role bio-chemical processes and the origin of life itself. The observation dynamics chiral is crucial for understanding control activity photo-excited states. One most promising techniques study systems time-resolved photoelectron circular dichroism (TR-PECD), which offers an intense sensitive probe vibronic geometric molecular structure as well electronic structures, their evolution on femtosecond timescale. However, non-local...
Graphene is one of the best conductive materials for developing nanocomposites due to its outstanding electronic properties. developed by modified Hummers’ method. Zinc oxide (ZnO) based composites were using different weight percentages (0.1%, 0.5% and 1%) as reinforcement. To enhance dispersion graphene in ZnO matrix synthesis was processed ultrasonication process. The obtained oxide, characterized X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR) field emission...
Due to the unique characteristics, tremendous research attention has been attracted by semiconductor nanoparticles in recent decades. Wide studies are undertaken for studying particle size efficiently. The biological, chemical and physical properties of enhanced significantly decreasing from micrometer nanometer scale. Among them, zinc oxide is a versatile material with superior electronic transport capabilities, robust optical transparency, relatively huge surface area volume ratio, bulky...
The vibrational wavenumbers of 3-pyridine carboxaldehyde were calculated using Gaussian03 software package at different levels and the fundamental modes are assigned.The predicted infrared Raman activities reported.The first hyperpolarizability is title compound an attractive object for future studies non linear optics.The in agreement with reported experimental values.
Metal-free phthalocyanines(H 2 Pc) and its derivatives are an important organic electro photo active material with remarkable chemical stability flexibility offering considerable interest for many intensive applications.The complexity of the molecule makes vibrational study Raman spectrum difficult.A assignment frequencies in F.T H Pc has been made comparison metal derivatives, other related porphyrin, pyrrole, indole orthosubsituted benzene structures.
Objective: The aim of this study is to determine the prevalence autoantibodies in patients with active, newly diagnosed tuberculosis (TB) a single centre Malaysia.The result may impact misinterpretation autoimmune testing undiagnosed TB that can cause devastating outcome patients.Methods: Fifty active TB, confirmed by radiological, sputum or other fluid smears cultures were recruited between July and November 2009 from respiratory unit wards Hospital Sultanah Aminah, Johor Bahru,...