Materials Literature
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Second Harmonic Generation (SHG) was used to study the optical properties of molecular films formed at liquid interfaces (air-water or dodecane-water interfaces). The technique was applied to a two-dimensional film of hemicyanine molecules: dye (4-(4-dihexadecylaminostyryl)-N-methylpyridinium iodide) (DiA) and 4-(4-(d…
In this paper, we introduce a floating plasmonic absorber having multiple resonances in the 8 ~ 14 μm spectral range and broadband absorption characteristics by adjusting Drude relaxation rate of metal. This plasmonic broadband resonator capable of capturing light with a large optical cross-section area is able to sub…
Through the application of a bias voltage, metamaterials can dynamically change their response, opening up new technological possibilities. Combining design elements from three common metamaterial patterns, we have created a metamaterial polarizing filter that will transmit all polarization orientations equally when i…
In this paper, we propose a surface plasmon resonance (SPR) sensor with metallic nano-particles, which is based on the Kretschmann configuration for reflective-type measurement with enhanced sensitivity. The proposed structure is analyzed and compared with a conventional Kretschmann configuration by using 3D finite-di…
The authors propose an alternative method for high resolution optical microscopy - Evanescent Field Scanning Optical Microscopy (EFSOM) which eliminates implementation of the scanning tip compare to classical NSOM technique. The approach involves scanning a sample in the evanescent-field of a prism generated using tot…
In this paper a method for producing resonant structures using laser micromachining is presented. In the spot of laser beam impact on AlN ceramics surface a conductive aluminum layer is formed. Compilation of process parameters allows for the fabrication of structures with resistance at Rs ~ 0.01Ω/Rs. It has been also…
Following former report in Optics Express 21, 19880, (2013), we present here a prototype mobile updatable holographic display system using a holographic stereographic technique with a transparent optical device of PMMA doped organic monolithic compound. 50 or 100 elemental holograms which are a series of pictures of o…
The chemistry of graphene oxide (GO) and its response to external stimuli such as temperature and light are not well understood and only approximately controlled. This understanding is however crucial to enable future applications of the material that typically are subject to environmental conditions. The nature of th…
Thin film silicon solar cells are optimized to increase their efficiency. One technique to obtain higher efficiency is to increase path length of light using textured surfaces. The impact of these layers on efficiency is usually studied using experimental methods. This requires building of a solar cell and is time con…
We studied how a surface-micromachined Fabry-Perot interferometer, realized with Si / air-gap distributed Bragg reflectors, would perform at the middle-infrared wavelengths. Compared with traditional solid-film pairs, this Si-FPI technology features better index contrast, which enables wider stop band and potentially…
We present trial calculations of surface light-induced patterns in photochromic azo-substituted polymers. Using microscope with nanopositioning stage various birefringence and surface structures have been recorded in photochromic azo-functionalized polymers. By systematic approach to the inscription experiment and con…
Ultrafast all-optical modulation in Ag/HfO2/Si/HfO2/Ag metal-insulator-semiconductor-insulator-metal (MISIM) nanoring resonators through two-photon absorption photogenerated free-carriers is studied using self-consistent 3-D finite difference time domain (FDTD) simulations. The self-consistent FDTD simulations incorpo…
Triphenyl Sn(IV)-A(lII)-µ-oxoisopropoxide derivatives having different (NOONO and OONO) backbones were obtained by the reaction of triphenyltin acetate and aluminium isopropoxide with corresponding ligand. Through variation of reaction stoichiometry, varieties of coordination compounds featuring µ-bridging coordinatio…
For the present study, 150 blood samples (50 from each breed, viz. Dumba, Patanwadi and Marwari) were collected randomly from animals located at Sheep Breeding Farm, Morbi, Gujarat. Isolation of genomic DNA was carried out. The genotyping was done with the help of PCR-RFLP. At locus KRT 1.2, studies revealed 3 genotyp…
The conformational complexity of chain-like macromolecules such as proteins and other linear polymers is much larger than that of point-like atoms and molecules. Unlike particles, chains can bend, twist, and even become knotted. Thus chains might also display a much richer phase structure. Unfortunately, it is not ver…
A major issue in the synthesis of ferrites using the co-precipitation technique is the refinement in the crystal structure. We report in this work for the first time the use of a pulsed Nd:YAG (1064 nm) laser to refine the structure of spinel ferrite using pre-digestion irradiation of the sample. In view of the techno…
Carbon atoms can form structures in one, two and three dimensions due to their unique chemical versatility. In terms of thermal conductivity, carbon polymorphs cover a wide range from very low values with amorphous carbon to very high values with diamond, carbon nanotubes and graphene. Schwarzites are a class of three…
Au+ ions have been successfully incorporated into the lattice of ZnxCd1−xS quantum dots as luminescent centers via an aqueous method. The dopant emission can be tuned in the range of 445 to 570 nm, and the highest quantum yield can reach as high as 30%. Our results showed that Au+ ions can be used as an excellent lumi…
Various carbon based nanostructures (graphene, graphene-CNTs hybrid and three-dimensional (3D) carbon network) have been grown separately on low-temperature (600 ?C) substrates by using a chemical vapor deposition system with a two-heating reactor. The two-heating reactor is utilized to offer sufficient, well-proporti…
Metglas 2826 MB having a nominal composition of Fe40Ni38Mo4B18 is an\nexcellent soft magnetic material and finds application in sensors and memory\nheads. However, the thin-film forms of Fe40Ni38Mo4B18 are seldom studied,\nalthough they are important in micro-electro-mechanical systems/nano-electromechanical\nsystems…