Shaping the photoluminescence from gold nanoshells by cavity plasmons in dielectric-metal core-shell resonators

Abstract

We report experimental investigation of the photoluminescence (PL) generated from the gold nanoshells of the dielectric-metal core-shell resonators (DMCSR) that support multipolar electric and magnetic based cavity plasmon resonances. Significantly enhanced and modulated PL spectrum is observed. By comparing the experimental results with analytical Mie calculations, we are able to demonstrate that the observed reshaping effects are due to the excitations of those narrow-band cavity plasmon resonances. We also present that the variation on the dielectric core size allows for tuning the cavity plasmon resonance wavelengths and thus the peak positions of the PL spectrum.

Broadband near-perfect optical absorbers fabricated with complete spherical platinum shells with and without induced symmetry broken cracks using a simple colloidal route

“…In comparison to EBL and FIB, the self-assembly method using colloidal microspheres is an efficient and low-cost method for producing two or three-dimensional nanostructure arrays. Many spherical arrays, including noble metal hemispherical shells, [21][22][23][24][25] dielectric core shells, 26,27 and nanopore arrays, 28 were constructed using microsphere assembling and deposition technology. Because of the different interactions between light and the above arrays including LSPR, cavity mode, and SPR effects, they were suitable for applications in SERS, sensors, optical switching, and photoluminescence (PL) fields.…”