Now showing items 1-10 of 17
Controlling Electromagnetic Surface Waves with Scalar and Tensor Impedance Surfaces.
(2013)
The propagation characteristics of electromagnetic waves on various isotropic (scalar) impedance surfaces have been studied for some time, in order to control surface waves and leaky-wave radiation. One and two dimensional ...
HgCdTe Auger-Suppressed Infrared Detectors Under Non-Equilibrium Operation.
(2009)
A nearly universal goal for infrared photon detection systems is to increase their operating temperature without sacrificing performance. The limiting factor for cooling requirements is the dark current in the detector ...
Structural Characterization and Impedance Spectroscopy of Substituted, Fused-Ring Organic Semiconductors.
(2011)
Organic materials present a number of advantages over silicon that make them ideal candidates for modest performance devices like active matrix backplanes and RFID tags. The work detailed here describes both structural ...
Fundamental and Applied Electrochemistry for Photonic Applications
(2020)
Photonic devices that selectively transmit or reflect light are highly desirable in a wide variety of applications, including energy harvesting, aesthetic decorations and optical displays. However, most of these high ...
Optical and Theoretical Studies of Excitons in Few-Layer Lead Iodide.
(2015)
Optical measurements and first-principles calculations of few-layer lead iodide (PbI2) crystals are presented in this work. Results indicate that the band structure and exciton energies change dramatically from direct-gap ...
Thermoelectric Transport in Disordered Materials
(2022)
Material disorder comes in two forms, dynamic energetic disorder and static energetic disorder, both of which can greatly influence charge and thermoelectric (TE) transport properties by altering the energy dependences of ...
Next Generation Graphene Photonics Enabled by Ultrafast Light-Matter Interactions and Machine Learning
(2021)
Graphene was first experimentally studied in 2004, featuring an atomically-thin structure. Since then, many unique photonic and electrical properties of graphene and other 2D materials were reported. However, additional ...
From Atoms to Devices: Performance Bottlenecks of Nitride Semiconductors Using Multi-Scale Quantum Methods
(2023)
III-nitride semiconductors have revolutionized modern electronics by enabling high-power radio-frequency and lighting technologies. These materials hold immense potential for new technologies such as miniaturized displays, ...
Carrier Transport in Auger-Suppressed Infrared Detector Materials
(2019)
State of the art infrared detectors can operate at high efficiency and low noise throughout the infrared wavelength range. However, MWIR and LWIR detectors are still limited by very low operating temperatures in order to ...
Operational Stability and Charge Transport in Fullerene-Based Organic Solar Cells
(2018)
Organic photovoltaic cells are approaching commercially-viable levels of performance for a variety of applications--particularly those which make use of the unique transparency, flexibility, and ultra-thin form factor that ...