Now showing items 1-10 of 19
Improvement of the electromagnetic enhancement in surface enhanced Raman spectroscopy
In this thesis, several ways to improve the electromagnetic (EM) enhancement in Surface Enhanced Raman Spectroscopy (SERS) are explored. Some factors influencing the EM enhancement, including material, polarization, size, ...
Growth and optimization of quantum dots-in-a-well infrared photodetectors
Quantum dot infrared photodetectors (QDIPs) have been shown to be a key technology in mid and long wavelength (3-14 µm) infrared detection due to their potential for normal incidence operation and low dark current. In our ...
Mid-IR type-II InAs/GaSb nanoscale superlattice sensors
The detection of mid-wavelength infrared radiation (MWIR) is very important for many military, industrial and biomedical applications. Present-day commercially available uncooled IR sensors operating in MWIR region (2-5µm) ...
Minority carrier lifetimes in germanium on silicon heterostructures
Photodiodes sensitive in the NIR and integratable with Si have been pursued for many applications including imaging, communications, and photovoltaics. Since the Si bandgap is inefficiently matched to NIR wavelengths, ...
Hierarchical aggregation and intelligent monitoring and control in fault-tolerant wireless sensor networks
The primary idea behind deploying sensor networks is to utilize the distributed sensing capability provided by tiny, low powered and low cost devices. Multiple sensing devices can be used cooperatively and collaboratively ...
Compact modeling of neutron damage effects in a bipolar junction transistor
The performance of microelectronics in a radiation environment is an important concern for defense and space applications. Bipolar junction transistors (BJTs), in particular, are susceptible to neutron radiation. Neutron ...
Optimal digital filter design for dispersed signal equalization
Any signal a satellite receives from Earth has traveled through the ionosphere. Transmission through the ionosphere results in a frequency dependent time-delay of the signal frequency components. This effect of the medium ...
Computational analyses of high power microwave slotted array antennas for mobile applications
Computational Analyses of High Power Microwave Slotted Array Antennas for Mobile Applications
Analysis of a laser induced plasma in high pressure SF6 gas for high-voltage, high-current switching
The Laser Triggered Switch Program at Sandia National Laboratories is an intensive development study to understand and optimize the laser triggered gas switch (LTGS) for the Z-Refurbishment (ZR) project. The laser triggered ...
Anomaly detection for HTTP intrusion detection : algorithm comparisons and the effect of generalization on accuracy
Network servers are vulnerable to attack, and this state of affairs shows no sign of abating. Therefore security measures to protect vulnerable software is an important part of keeping systems secure. Anomaly detection ...