Nano letters, 2013-12, Vol.13 (12), p.6048-6054
2013
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Titel
- Enhancement of Second Harmonic Signal in Nanofabricated Cones
- Ist Teil von
- Nano letters, 2013-12, Vol.13 (12), p.6048-6054
- Ort / Verlag
- Washington, DC: American Chemical Society
- Erscheinungsjahr
- 2013
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Geometrical effects in optical nanostructures on nanoscale can lead to interesting phenomena such as inhibition of spontaneous emission, , high-reflecting omnidirectional mirrors, structures that exhibit low-loss-waveguiding, and light confinement. , Here, we demonstrate a similar concept of exploiting the geometrical effects on nanoscale through precisely fabricating lithium niobate (LiNbO3) nanocones arrays devices. We show a strong second harmonic generation (SHG) enhancement, shape and arrangement dependent, up to 4 times bigger than the bulk one. These devices allow below diffraction limited observation, being perfect platforms for single molecule fluorescence microscopy or single cell endoscopy. Nanocones create a confined illumination volume, devoid from blinking and bleaching, which can excite molecules in nanocones proximity. Illumination volume can be increased by combining the SH enhancement effect with plasmon resonances, excited thanks to a gold plasmonic shell deposited around the nanostructures. This results in a local further enhancement of the SH signal up to 20 times. The global SH enhancement can be rationally designed and tuned through the means of simulations.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1530-6984eISSN: 1530-6992DOI: 10.1021/nl403279yTitel-ID: cdi_proquest_miscellaneous_1753483421
- Format
- –
- Schlagworte
- Arrays, Collective excitations (including excitons, polarons, plasmons and other charge-density excitations), Condensed matter: electronic structure, electrical, magnetic, and optical properties, Condensed matter: structure, mechanical and thermal properties, Devices, Diffraction, Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures, Exact sciences and technology, Excitation, Fluorescence, Gold - chemistry, Illumination, Light, Lithium niobates, Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties, Nanostructure, Nanostructures - chemistry, Nanotechnology, Niobium - chemistry, Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation, Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures, Oxides - chemistry, Physics, Surface and interface electron states, Surface Plasmon Resonance, Surfaces and interfaces, thin films and whiskers (structure and nonelectronic properties)