Control of Energy Transfer and Molecular Energetics using Photonic Nanostructures

<p>In the last three decades, the design and fabrication of different types of photonic nanostructures have allowed us to control and enhance the interaction of light (or photons) with matter (or excitons). In this work, we demonstrate the use of three different nanostructures to control different material properties. The design and fabrication of the nanostructures is discussed along with the results obtained using characterization techniques of angle-resolved white light reflectivity and transmission, and time-resolved and steady-state photoluminescence experiments. Specifically, we demonstrate the use of Optical Topological Transitions (OTT) in metamaterials to show enhanced efficiency in the non-radiative transfer of energy between two sets of molecules where the separation is an order of magnitude higher than the traditional limit beyond which the energy transfer is usually too small to be observed. We also utilize “strong coupling” : a regime of light-matter interaction that results in the formation of part-light, part-matter quasi-particles and new energy eigen states. This phenomenon in exploited in two cases. In the first, we demonstrate strong coupling of an organic molecule, 3-(dimethylamino)-1-(2-hydroxy-4-methoxyphenyl)-2-propen-1-one (HMPP), to a microcavity which results in modified dynamics of Excited State Intramolecular Proton Transport (ESIPT) in HMPP. In the second case, we strongly couple multiple vibronic transitions in another organic molecule, diindenoperylene (DIP), to surface plasmons and demonstrate the resulting changes in emission properties at different temperatures.</p>

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

Doctoral

Discipline thesis:degree_discipline

Physics

Grantor

The Graduate School and University Center of The City University of New York

Year dc:date.available

2019

Author dc:creator

• Deshmukh, Rahul

Advisor dc:contributor.advisor

• Vinod M. Menon

Committee members dc:contributor.committeemember

• Adam Braunschweig
• Swapan Gayen
• Neepa Maitra
• Jacob Trevino
• Joel Yuen Zhou

• Condensed Matter Physics
• Optics
• metamaterials
• surface plasmons
• resonance energy transfer
• strong coupling
• ESIPT

Repository record dc:identifier

https://academicworks.cuny.edu/gc_etds/3055

OAI identifier oai:identifier

oai:academicworks.cuny.edu:gc_etds-4126