A5101183336- Topological Materials and Phenomena
- Chalcogenide Semiconductor Thin Films
- 2D Materials and Applications
- Astronomical Observations and Instrumentation
- Infrared Target Detection Methodologies
- Solar and Space Plasma Dynamics
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Quantum Dots Synthesis And Properties
- Astrophysical Phenomena and Observations
- Graphene research and applications
- Electronic and Structural Properties of Oxides
- Solar Radiation and Photovoltaics
- Nanowire Synthesis and Applications
- Spacecraft Design and Technology
- Photonic Crystals and Applications
- Advanced Thermoelectric Materials and Devices
- Cognitive Radio Networks and Spectrum Sensing
- Blind Source Separation Techniques
- Advanced Condensed Matter Physics
- Distributed Sensor Networks and Detection Algorithms
- Block Copolymer Self-Assembly
- Advanced Measurement and Detection Methods
- Advanced Chemical Sensor Technologies
- Metamaterials and Metasurfaces Applications
Academy of Scientific and Innovative Research
2019-2024
Council of Scientific and Industrial Research
2019-2024
Indian Space Research Organisation
2017-2024
Indian Institute of Science Education and Research Mohali
2024
National Institute of Technology Kurukshetra
2016-2017
The development of imaging technology and optical communication demands a photodetector with high responsiveness. As demonstrated by microfabrication nanofabrication advancements, recent progress in plasmonic sensor technologies can address this need. However, these photodetectors have low absorption ineffective charge carrier transport efficiency. Sb2Se3 is light-sensitive material coefficient, making it suitable for applications. We developed an efficient, scalable, low-cost near-infrared...
WTe2 is one of the wonder layered materials, displays interesting overlapping electron-hole pairs, opening surface bandgap, anisotropy in its crystal structure and very much sought appealing material for room temperature broadband photodection applications. Here we report photoresponse thin films microchannel devices fabricated on silicon nitride substrates. A clear sharp rise photocurrent observed under illumination visible (532 nm) NIR wavelengths (1064 nm). The phoresponse convincing...
Bias-dependent trapping and de-trapping can be seen in the SnSe device. At low bias, voltage of carriers device; they start to de-trap after 500 mV bias.
Topological insulators (TIs) possess exciting nonlinear optical properties due to presence of metallic surface states with the Dirac fermions and are predicted as a promising material for broadspectral phodotection ranging from UV (ultraviolet) deep IR (infrared) or terahertz range. The recent experimental reports demonstrating mostly carried out on non-flexible substrates there is huge demand fabrication high performing flexible optoelectronic devices using new exotic materials their...
The Solar Ultraviolet Imaging Telescope (SUIT) is an instrument on the Aditya-L1 mission of Indian Space Research Organization (ISRO) launched September 02, 2023. SUIT continuously provides, near-simultaneous full-disk and region-of-interest images Sun, slicing through photosphere chromosphere covering a field view up to 1.5 solar radii. For this purpose, uses 11 filters tuned at different wavelengths in 200{--}400~nm range, including Mg~{\sc ii} h~and~k Ca~{\sc ii}~H spectral lines....
SnSe2/SnOx/SnSe heterojunction thin films with different thicknesses 137, 241 and 297 nm were fabricated via the thermal evaporation technique. XRD, FESEM, Raman spectroscopy, XPS, U–V visible spectroscopy used to study structural, morphological, chemical, optical properties of deposited films, which revealed that had a microcrystalline structure mixed SnSe2, SnSe, SnO, SnO2 phases. Only sample lower thickness (137 nm) exhibited p-n type behaviour when concentration (1–5 ppm) temperature...
The development of multifunctional devices could represent a significant advancement in meeting the need for nano and micro technologies. Therefore, we have developed Ag/Sb2Se3/FTO-based multifunction device having nanostructures, which works as an ultraviolet (UV) photodetector switching device. Our theory suggests how oxygen formation leads to detection UV range rather than infrared range, is natural Sb2Se3. m–s–m based on photoconductive phenomenon, ultrafast transient absorption...
Studies of negative magnetoresistance in novel materials have recently been the forefront spintronic research. Here, we report an experimental observation temperature dependent Bi2Te3 topological insulator (TI) nanowires at ultralow temperatures (20 mK). We find a crossover from to positive while increasing under longitudinal magnetic field. observe large which reaches -22% 8T. The interplay between and can be understood terms competition dephasing spin-orbit scattering time scales. Based on...
Phoresis of biocolloidal objects in response to chemical gradients is a matter interest among diverse scientific disciplines owing their importance the spatiotemporal orchestration biochemical processes. Although there are reports soft transport/phoresis gradient ions or salts aqueous system, phoretic behavior presence macromolecular crowder largely unexplored. Notably, cellular cytoplasm illustrated as crowded milieu and thereby understanding biomolecular phoresis polymeric macromolecules...
The present study has investigated the photoresponse of n-MoS2 QDs/n-MoS2/p-CuO, a hybrid dimensional nanoscale heterostructure fabricated on flexible Ag-coated Kapton substrate. demonstrates significant response toward ultraviolet (UV) (376 nm) to near-infrared (NIR) (1064 wavelengths, even in self-powered mode. type-II formed between and p-CuO layers offers necessary built-in potential for separating transporting photogenerated electron–hole pairs. nanodimensional responsivities 28, 54, 83...
Chandrayaan-2 Large Area Soft X-ray Spectrometer (CLASS) is an fluorescence spectrometer experiment aimed at mapping the abundances of major rock-forming elements on lunar surface.The instrument consists swept charge devices with a passive collimator, visible light blocking filters and signal processing electronics designed built U.R. Rao Satellite Centre, Indian Space Research Organisation.CLASS will be largest collecting area flown to Moon, thus expected map higher sensitivity than ever...
Gold nano-structures (Au-NS's) assembled on a multiwalled carbon nanotube (MWCNT's) reinforced functional substrate is very attractive system routinely used in optoelectronics, EM shielding plasmonics, catalysis, chemical sensing, and solar energy devices. Here we simple thermal annealing method to assemble gold nano-islands (Au-NI's) quantum dots (QD's) flexible lightweight multiwall (FL-MWCNT) paper. We report thickness dependent Au thin film form Au-NI's i.e. QD's FL-MWCNT The highly...
ABSTRACT The Solar Ultraviolet Imaging Telescope (SUIT) is one of the payloads onboard Aditya-L1 mission. It will perform full disc imaging Sun in near-ultraviolet (UV) wavelength range 200–400 nm. This provides near-simultaneous observations from photosphere and chromosphere. A back-illuminated, enhanced UV charge coupled device (CCD) size 4096 (H) × 4136 (V) pixels, with a pixel 12 μm, used as an element SUIT. CCD characterization readout electronics development testing were performed...