Gold Organometallics: Game Changers for Optical Power Limiting
Abstract
The purpose of this basic research is to develop gold organometallics into nonlinear light absorbers. The choice of gold is motivated by the non-chromophoric character of the carbon-gold ?-bond, which favors linear transparency, and by gold’s spin-orbit coupling, which promotes dual mode nonlinear absorption. Gold will be bound to conjugated organic ligands through direct ?-bonds to aryl carbon, through alkynyl linkers, and through triazolyl and imidazolyl rings. Experimental results that validate the proposed synthetic strategies are discussed. Both mononuclear and polynuclear gold complexes will be evaluated as reverse saturable absorbers. The broad redox chemistry of gold will be exploited, and chromophores are sought that incorporate gold(I), gold(II), and gold(III). New compounds will be characterized by ground-state and optical measurements. The latter will include absorption spectroscopy, static and time-resolved emission spectroscopy, two-photon absorption spectroscopy, and nonlinear transmission measurements. The inherent variety of gold organometallics, combined with the spin-orbit coupling of the heavy metal make gold a game changer for reverse saturable absorption.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 11, 2018
- Source ID
- FA95501810247
Entities
People
- Thomas G Gray
Organizations
- Air Force Office of Scientific Research
- Case Western Reserve University
- United States Air Force