Semiconductor nanoparticles exhibit size dependent properties due to quantum confinement effect that are not present in their bulk counterparts. In this work, extremely fine and pure SnO2 nanoparticles of ~1.1 nm size were synthesized by a solution process, in which amorphous precipitate of SnO2 was crystallized by microwave heating. The particles sizes varied from ~1.1 to ~2.7 nm. By XRD analy...

We present a procedure for the characterization and the linearization of the photoresist response to UV exposure for application to the gray-scale fabrication of diffractive optical elements. A simple and reliable model is presented as part of the characterization procedure. Application to the fabrication of surface-relief diffractive optical elements is presented, and theoretical predictions a...

This work presents a method for large signal characterization of avalanche photodiode (APD) where measurements were carried out using pulsed RF signal at different DC bias points to extract dispersive parameters of the avalanche photodiode. Pulsed optical excitation on the photodiode were synchronized with the pulsed RF signal using a synchronization circuit and in this way characterization of ...

Modeling and simulation plays a very important role in the development of new technologies for manufacturing of integrated circuits. Optical projection printing is an excellent example of this activity which i9s described in this chapter. A brief introduction overviews the nature of characterization process and the role of modeling and simulation. The traditional experimentally driven character...

Whispering gallery delay lines have demonstrated record propagation length on a silicon chip and can provide a way to transfer certain applications of optical fiber to wafer-based systems. Their design and fabrication requires careful control of waveguide curvature and etching conditions to minimize connection losses between elements of the delay line. Moreover, loss characterization based on o...

Due to their non-toxic nature, biodegradability and production from renewable resources, research has shown an increasing interest in the use of biosurfactants in a wide variety of applications. This paper reviews the characterization of rhamnolipid and sophorolipid biosurfactants based on their hydrophilicity/hydrophobicity and their ability to form microemulsions with a range of oils without ...

Title of Thesis: CHARACTERIZATION OF TWO-PHOTON ABSORPTION DETECTORS FOR APPLICATIONS IN HIGH-SPEED OPTICAL SYSTEMS Degree candidate: Reza Salem Degree and year: Master of Science, 2003 Thesis directed by: Professor Thomas E. Murphy Department of Electrical and Computer Engineering This thesis investigates the process of two-photon absorption in optical detectors. We begin by describing some co...

we report the growth and characterization of cu nanoparticles thin film of on glass substrate by pulse laser deposition method. the cu thin film prepared with different energy 50, 60, 70, and 80 mj. the energy effect on the morphological, structural and optical properties were studied by afm, xrd and uv-visible spectrophotometer. surface topography studied by atomic force microscopy revealed na...

Cadmium sulfide nanoparticles were grown using wet chemical method by dissolving the reactants of cadmium acetate and sodium sulfide in the presence of thioglycerol (TG) as capping agent in ethanol solvent. Different nanoparticle sizes and size distribution were obtained through varying the molarities of thioglycerol. At higher TG concentration, synthesis provides a nearly monodisperse nanopart...