- Plasmonic nanopillar arrays for large-area, high-enhancement surface-enhanced Raman scattering sensorsJoshua D Caldwell
U S Naval Research Laboratory, 4555 Overlook Avenue, S W, Washington, D C 20375, United States
ACS Nano 5:4046-55. 2011....
- Large-area plasmonic hot-spot arrays: sub-2 nm interparticle separations with plasma-enhanced atomic layer deposition of Ag on periodic arrays of Si nanopillarsJoshua D Caldwell
US Naval Research Laboratory, Washington, DC 20375 USA
Opt Express 19:26056-64. 2011..These plasmonic 'hot-spots' arrays exhibited over an order of magnitude increase in the SERS response in comparison to similar arrays with larger interpillar separations...
- Low-loss, extreme subdiffraction photon confinement via silicon carbide localized surface phonon polariton resonatorsJoshua D Caldwell
US Naval Research Laboratory, Washington, DC, United States
Nano Lett 13:3690-7. 2013..Under certain conditions, the modes are Raman-active, enabling their study in the visible spectral range. These observations promise to reinvigorate research in SPhP phenomena and their use for nanophotonic applications...
- Sub-diffractional volume-confined polaritons in the natural hyperbolic material hexagonal boron nitrideJoshua D Caldwell
U S Naval Research Laboratory, 4555 Overlook Ave, S W, Washington, District of Columbia 20375, USA
Nat Commun 5:5221. 2014..These observations assert hexagonal boron nitride as a promising platform for studying novel regimes of light-matter interactions and nanophotonic device engineering. ..