3D Hollow Nanostructures as Building Blocks for Multifunctional Plasmonics

Abstract

We present an advanced and robust technology to realize 3D hollow plasmonic nanostructures which are tunable in size, shape, and layout. The presented architectures offer new and unconventional properties such as the realization of 3D plasmonic hollow nanocavities with high electric field confinement and enhancement, finely structured extinction profiles, and broad band optical absorption. The 3D nature of the devices can overcome intrinsic difficulties related to conventional architectures in a wide range of multidisciplinary applications.

Spatially, Temporally, and Quantitatively Controlled Delivery of Broad Range of Molecules into Selected Cells through Plasmonic Nanotubes

“…As sketched in Figure 1 , hollow plasmonic nanotubes [ 20 ] are combined with a microfl uidic channel embedded into the substrate. Cells are cultured on the top of the device, which appears as a standard gold substrate with nanotubes protruding from the substrate plane.…”

“…Concerning the plasmonic enhancement, we have already demonstrated that, thanks to the particular 3D geometry, the fabricated outof-plane nanostructures provide very good performances. [ 20,31 ] For the geometries reported above, we calculated an enhancement factor of 15 at λ = 1064 (see Section S2 in the Supporting Information).…”

“…For instance, these plasmonic nanotubes are also very effective for spectroscopic investigations such as Raman scattering [ 20,32 ] that give a deep insight into the biochemical processes occurring on the cell membrane or on the intracellular environment. [ 18 ] Furthermore, by using standard lithographic techniques, arrays of planar electrodes can be achieved in combination with the nanotubes.…”

Large-Scale Plasmonic nanoCones Array For Spectroscopy Detection

“…3D-nanostructure device fabrication could be employed to improve the detection capability of the sensor. The high electric field enhancement shows broad range applications in non-linear optics 24 , optical rectification 25 and also for single molecule 4 detection 26 . Recently, Chirumamilla et al 5 realized 3D nanostars structures on Si substrate by employing electron-beam lithography (e-beam lithography) and reactive ion etching (RIE), which allowed to achieve the enhanced electric field around 50.…”

Plasmon management in index engineered 2.5D hybrid nanostructures for surface-enhanced Raman scattering

“…The fact that Ag-or AuNP-dispersed vertically aligned 1D NW/nanorods 10 supported on a 2D wafer, to be called 2.5D hereafter, are better SERS performers [11][12][13][14][15][16][17] indicates a role for both the LMR and the SWs; however, this role has not yet been reported. Such a study is difficult but immensely useful because the hybrid (metal-semiconductor) nanostructures can be used for a wide range of applications such as SERS, [16][17][18] photonics, 4,5 renewable energy 3 and biomedicine. [19][20][21] This study addresses whether the newly observed optical effects, LMR and SWs in an NW system, can positively affect the plasmonic E field for photonic applications.…”