New in Materials Research Express!

Hyperspectral dark-field image of gold nanoparticles in PDMS

Gold nanoparticle-polydimethylsiloxane films reflect light internally by optical diffraction and Mie scattering

JR. Dunklin, G.T. Forcherio, D.K. Roper
Materials Research Express (2015), 2(8), 085005.

Mie scattering and inter-particle diffraction by gold nanoparticles obliquely scatter light within PDMS films to increase resonant optical extinction and enhance lateral energy transfer.

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New in Advanced Optical Materials!

In tandem experimentation and simulation of gold nanoparticles on MoS2

Spectral characteristics of noble metal-molybdenm disulfide heterostructures

G.T. Forcherio, D.K. Roper
Advanced Optical Materials (2016), 4(8), 1288-1294.

Benchmarked use of DDA with experimentation to describe resonant optoelectronic interactions between metal nanoparticles and monolayer MoS2, thus paving the way to optimize these hybrid nanomaterial systems in emergent applications.

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SPIE Newsroom

SPIE has highlighted our group’s research in “Biological sensing with metamaterials.” This article summarizes our recent progress advancing nanotechnology to design, fabricate, characterize, and implement metamaterials for the diagnosis, treatment, and management of disease.

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Electromagnetic interactions with nanometer-scale architectures have important applications in healthcare, energy, and the environment.

The NanoBio Photonics group under the direction of Prof. D. Keith Roper studies near- and far-field features of electromagnetic-coupled surface waves, such as plasmons, and low-frequency modes, like molecular vibrations and optical phonons, on nanoscale structures. The group is particularly interested in photon-plasmon coupling on films, nanoparticles, and both random and periodic assemblies of nanparticles, including metamaterials. Optoplasmonic interactions are examined to distinguish effects of near- and far-field radiative interactions and to design nanoscale architectures with enhanced performance in biosensing, solar energy, optoelectronics, microthermalfluidics, spectroscopy, diagnostics and therapeutics. Advanced techniques are used together with novel adaptations of engineering, physics, and chemistry methods to fabricate architectures that are envisioned by modeling. A variety of complementary analytical techniques are then used to compare experimental data from fabricated structures with predictions from theoretical models. Nanoscale architectures that result from this rational process exhibit photon-plasmon coupling that offers significant improvements to solar photovoltaics, microscopy, spectroscopy and sensing of biological entities.