Three-dimensional hybrid photonic crystals merged with localized plasmon resonances

Abstract

Localized plasmon resonances are proposed in a new concept of 3D photonic crystals stacked by hybrid rods made of dielectric-cores and metallic-nanoshells. The resonant plasmon coupling of inner and outer surfaces of the metallic-nanoshells forms the localized plasmon resonances which can be flexibly tuned by mediating the dielectric cores. At the resonance wavelengths, the strong electromagnetic wave-plasmon interaction leads to the enhancement in the structural absorption by more than 20 times. The tunability of the enhanced absorption is demonstrated in experiments.

The effects of retardation on plasmon hybridization within metallic nanostructures

“…We have used the RPHT to investigate the retarded plasmon modes in metallic nanotubes with dielectric cores. These plasmon modes are comparable to those observed recently within metallic photonic crystals [24]. We have shown that retardation can also alter the dispersion characteristics of propagating plasmons within metallic nanotubes.…”

“…This geometry is of interest, especially within the photonic crystal community, where metallic photonic crystals are built from dielectric rods uniformly coated with metals such as gold and silver [24], These metallic structures may possess plasmons at the wavelengths of operation of the photonic crystal depending on the geometry of the structure. As these structures typically have rod sizes D > λ/10, retardation will be significant.…”

Past achievements and future challenges in the development of three-dimensional photonic metamaterials

“…By using two-photon absorption, only a tiny volume is sufficiently exposed by the light. By computer-controlled scanning of the relative positions of focus and resist via piezoelectric actuators, almost arbitrary polymer structures can be fabricated [47][48][49] . In regular DLW, the lateral resolution is limited to about 100 nm.…”

Nanomaterials for Optical Sensing and Sensors: Plasmonics, Raman, and Optofluidics

“…Demands for fast and low-cost sensing methods and devices for environment monitoring [1], point-of-care diagnosis [2], and food and water safety control [3] are growing rapidly over the years, especially in the underdeveloped areas. Thanks to the advancement of nanotechnology in the past decade, nanomaterials, especially when combined with modern optical sensing techniques, provide us with many new tools, such as surface-enhanced Raman spectroscopy [4], surface plasmon resonance [5], photonic crystal [6], and optofluidics [7], for the sensing applications not accessible by traditional sensing techniques. In the recent decade the research in this field has become flourishing.…”