[1] Biomass burning is one of the largest sources of trace gases and aerosols to the atmosphere and has profound influence on tropospheric oxidants and radiative forcing. Using a fully coupled chemistry-climate model (GFDL AM3), we find that co-emission of trace gases and aerosol from present-day biomass burning increases the global tropospheric ozone burden by 5.1% and decreases global mean OH...

ON THE NATURE OF EXCITED STATES IN RUTHENIUM COMPLEXES:TOWARDS RENEWABLE ENERGYbyRYAN ANTONIO THOMASAugust 2015 Advisors: Prof. John F. Endicott and Prof. Cláudio N. Verani Major: Chemistry (Analytical) Degree: Doctor of Philosophy The 77 K radiative properties (spectra, quantum yields and lifetimes) of ruthenium-polypyridyl complexes are investigated to better understand th...

We derive a general formalism to model the polariton states resulting from the radiation-matter interaction between an arbitrary number of excitonic transitions in semiconductor quantum dots and photon modes in a photonic crystal structure in which the quantum dots are embedded. The Maxwell equations, including the linear nonlocal susceptibility of the exciton transitions in the quantum dots, a...

Several groups have demonstrated smoothing of (Al,Ga)As/GaAs quantum well heterointerfaces by growth interrupts (GI). Such quantum wells (QW) usually exhibit multiple narrow line emission spectra where the energy and separation of the peaks 1s consistent with large lateral islands varying in helght by a monolayer. Unfortunately, the integrated emission can be reduced by an order of magnitude as...

Within the standard model of particle physics and cosmology we have calculated the big-bang prediction for the primordial abundance of Helium to a theoretical uncertainty of 0.1% (δYP = ±0.0002). At this accuracy the uncertainty in the abundance is dominated by the experimental uncertainty in the neutron mean lifetime, τn = 885.3 ± 2.0 sec. The following physical effects were included in the ca...

Spatial and dielectric confinement modulations of the spontaneous emission rates, transition energies, and charge-density distributions of a singly ionized double donor system D2 + in a spherical quantum dot are calculated within the framework of the effective-mass envelope function approximation. Dipole moments, energy splittings, transition moments, electron-density distributions, and spontan...

A unified and completely time-independent approach based on Feshbach's formalism for nuclear reactions, in which radiative and nonradiative processes are treated on an equal basis, is used to describe the behavior of isolated molecules in a radiation field. The expressions developed are complete and link excited states of measurable lifetime to resonances arising from the action of Green functi...

We study the trinified model, SU(3)C × SU(3)L × SU(3)R × Z3, with the minimal Higgs sector required for symmetry breaking. There are five Higgs doublets, and gauge-coupling unification results if all five are at the weak scale, without supersymmetry. The radiative see-saw mechanism yields sub-eV neutrino masses, without the need for intermediate scales, additional Higgs fields, or higher-dimens...

Heat transfer by electromagnetic radiation is one of the common methods of energy transfer between objects. Using the fluctuation-dissipation theorem, we have studied the effect of particle arrangement in the transmission of radiative heat in many-body systems. In order to show the effect of the structure morphology on the collective properties, the radiative heat transfer is studied and the re...