A5001485601- Gold and Silver Nanoparticles Synthesis and Applications
- Nonlinear Optical Materials Studies
- Nanocluster Synthesis and Applications
- Earthquake Detection and Analysis
- Terahertz technology and applications
- Pulsars and Gravitational Waves Research
- Photonic and Optical Devices
- Advanced Nanomaterials in Catalysis
- Advanced Semiconductor Detectors and Materials
- Gamma-ray bursts and supernovae
- Protein Interaction Studies and Fluorescence Analysis
- Laser-Ablation Synthesis of Nanoparticles
University of Central Florida
2023-2024
Indian Institute of Technology Kharagpur
2020-2023
Since gamma-ray bursts (GRBs) are related to extreme explosions in the universe, they provide a unique setup study various space plasma phenomena. The GRB spectra supply wide range of information regarding nonlinear interactions and associated structures. In this work, we generation shock fronts their properties plasma. Such is aftereffect an explosion which prompt emission GRBs signatures. studied analytically by deriving KdV–Burger's equation. solution KdV–Burgers equation via "Cole-Hoff...
The effects of shape, size, and surface plasmon resonance (SPR) peak position (λSPR) on nonlinear absorption (NLA) were investigated at 808 nm, using a femtosecond laser. We found that NLA behavior is the result competition between saturable (SA) reverse (RSA). SA behavior, i.e., optical transparency in silver nanocrystals, introduced by change shape structure from solid nanospheres to hollow nanocubes. For latter, dominates low input irradiance, while RSA higher laser powers. A series...
Abstract Detection of long wave infrared (LWIR) light at room temperature is a long‐standing challenge due to the low energy photons. A low‐cost, high‐performance LWIR detector or camera that operates under such conditions pursued for decades. Currently, all available detectors operate based on amplitude modulation (AM) and are limited in performance by AM noises, including Johnson noise, shot background fluctuation noise. To address this challenge, frequency (FM)‐based detection technique...
This study investigates the coherent optical nonlinearity of two sets anisotropic silver nanocrystals (NCs) showing plasmon peaks at 530 and 610 nm (hence named Ag-530 Ag-610 NCs, respectively). The nonlinear (NLO) properties NCs are compared with spherical exhibiting peak 420 called Ag-420 NCs). Resonant excitation induces significant one-photon absorption (1PA) saturation for all displaying exceptional transparency. Off-resonant reveals efficient two-photon (2PA), three-photon (3PA),...
A unique no-stirring synthesis has been developed to obtain highly monodisperse hollow silver nanoshells (HAgNSs) with plasmons in the second near-IR (NIR-II) window. The method also introduces dimethylglyoxime (DMG) as a quadrupole-supporting agent. quadrupole surface plasmon resonance (Q-SPR) was found be intense and tunable from 450 558 nm. Two types of dipolar resonances, symmetric dipole (SD-SPR) antisymmetric (AD-SPR), are observed. AD-SPR peaks remain constant at 333 nm while SD-SPR...