A5064356053- Plasmonic and Surface Plasmon Research
- Photonic Crystals and Applications
- Strong Light-Matter Interactions
- Photonic and Optical Devices
- Molecular Junctions and Nanostructures
- Metamaterials and Metasurfaces Applications
- Photochemistry and Electron Transfer Studies
- Advanced Antenna and Metasurface Technologies
- Laser Design and Applications
- Luminescence and Fluorescent Materials
- Optical Coatings and Gratings
- Dendrimers and Hyperbranched Polymers
- Organic Light-Emitting Diodes Research
- Antenna Design and Analysis
- Laser Material Processing Techniques
- Energy Harvesting in Wireless Networks
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanowire Synthesis and Applications
- Solid State Laser Technologies
- Acoustic Wave Resonator Technologies
- Quantum Information and Cryptography
- Random lasers and scattering media
Norfolk State University
2016-2021
Naval Surface Warfare Center
2021
Strong coupling of excitons in macroscopic ensembles quantum emitters and cavities (or surface plasmons) can lead to dramatic change the optical properties modification dispersion curves, characterized by normal mode splitting order 1 eV. Such gigantic alteration hybrid energy states enables scores unparalleled physical phenomena functionalities, ranging from enhancement electrical conductivity control chemical reactions. While single a cavity is pure mechanical phenomenon, origin strong...
In this Perspective, we make the case that (meta) material platforms were originally designed to control propagation of light can affect scores physical and chemical phenomena, which are often thought lie outside traditional electrodynamics domain. We show nonlocal metal-dielectric environments, be as simple metal–dielectric interfaces, spontaneous stimulated emission, Förster energy transfer, wetting contact angle, rates reactions. The affected phenomena occur in both strong weak coupling...
Understanding and harnessing energy transfer in organic inorganic systems is of high fundamental practical importance. In this work, we have experimentally studied the effect lamellar hyperbolic metamaterials metal/dielectric interfaces on concentration-dependent luminescence quenching thin polymeric poly (methyl methacrylate) films doped with 2-[7-(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)-1,3,5-heptatrienyl]-1,3,3-trimethyl-3H-indoliumiodide dye molecules. The rate concentration...
We have studied emission kinetics in dye-doped polymeric films (HITC:PMMA), deposited on top of glass and silver embedded Fabry–Perot cavities (metal-insulator-metal waveguides). For highly doped glass, we observed strong concentration quenching, as evidenced by a dramatic shortening the kinetics, consistent with our previous studies. However, for same silver, slower were despite high decay rates individual dye molecules near metallic surface. The quenching nearly identical to those...
Abstract We have studied the dependence of concentration quenching luminescence (donor–acceptor energy transfer) on thickness d dye-doped polymeric films (HITC:PMMA) and found its strong inhibition at small values . This phenomenon is tentatively explained by a limited number acceptors, which donors’ excitation can reach in thin samples, if film’s comparable to diffusion length transfer. The latter mechanism, along with effective reduction dye concentration, responsible for an molecules...
The long-range inhibition of the luminescence concentration quenching in heavily doped HITC:PMMA polymeric films vicinity lamellar hyperbolic metamaterials and metallic surfaces is tentatively explained terms strong exciton-plasmon coupling.
We found that strong coupling with the cavity can increase Stokes shift of dye molecules. The experimental finding is qualitatively explained simple model based on splitting excited state parabola.
We have studied, theoretically and experimentally, coupling to propagating volume modes in a lamellar metal/dielectric metamaterial with hyperbolic dispersion. Highly efficient light penetration though tens of metamaterial's layers suggests reasonably low propagation loss.
We have studied the effects of metallic substrates, lamellar metal-dielectric stacks and Fabry-Perot cavities on spontaneous emission concentration quenching luminescence HITC laser dye. Among most intriguing results this research are: (1) The long-range (~50 nm) inhibition (Förster energy transfer to centers) by substrates (2) Enhancement quantum yield with reduction cavity size below 100 nm.
We show that concentration quenching of emission dye molecules - an energy transfer to centers is inhibited in subwavelength Fabry-Perot cavities (or metal-insulator-metal, MIM, waveguides). © 2019 The Author(s)
We show that concentration quenching of emission dye molecules – an energy transfer to centers is inhibited in subwavelength Fabry-Perot cavities (or metal-insulator-metal, MIM, waveguides).
We have studied, both theoretically and experimentally, the excitation of volume modes in a lamellar metal/dielectric metamaterial with hyperbolic dispersion. The highly efficient light penetration through tens layers is consistent relatively low propagation loss. were found to be sensitive surface roughness layers, which can detrimental factor device applications.
We found that inhibition of concentration quenching HITC dye in Fabry-Perot cavities is almost similar to on top silver. Low convexity the emission kinetics suggests strong coupling mediated by surface plasmons.
We have studied the effects of planar, lamellar, and random nanostructured metal-dielectric environments on spontaneous emission energy transfer concentration quenching HITC laser dye. found an inhibition in vicinity metal, which was stronger substrates than plain geometries. It shown that same substrates, boosted emission, also inhibited quenching. The effect is discussed terms Förster radius affected by losses. Work at LLNL performed under auspices U.S. Department Energy Contract DE-AC52-07NA27344
We have studied the dependence of concentration quenching luminescence on thickness d dye-doped polymeric films (HITC:PMMA) and found a strong inhibition donor-acceptor energy transfer (concentration quenching) at small values .
Photodetectors harnessing hot carrier generation on surface plasmon resonant nanoantennas are a promising avenue to achieving sub-bandgap imaging at room temperature. However, efficient extraction of plasmonic carriers under low-energy infrared (IR) excitation predicates careful design Schottky interfaces. This work reports the simulation-guided fabrication Au (i) planar diodes and (ii) embedded IR interfaced with both n-/p-type Si GaAs semiconductors in order elucidate impact their...