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.

Read the full article here!

Advanced Science News

Our recent work published in Advanced Optical Materials was highlighted by Wiley’s Advanced Science News!

Hot Electrons Racing through Gold Nanoantennas

Read the full article here!

New in Advanced Optical Materials!

Photodoping of MoS2 from gold nanoparticles

Electron energy loss spectroscopy of hot electron transport between gold nanoantennas and molybdenum disulfide by plasmon excitation

G.T. Forcherio, M. Benamara, D.K. Roper
Advanced Optical Materials (2016), DOI: 10.1002/adom.201600572.

Used the electron probe of a STEM to induce 6% efficient hot electron transport via 16 fs plasmonic decay from gold nanoparticles to underlying monolayer MoS2 and study their resonance interactions.

Read the full article here!


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.