Plasmonic Nanostructures
Plasmonic Nanostructures - Related Videos
09:29
Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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2011
Plasmonic tweezers and photonic crystal nanostructures are shown to produce useful enhancements in the efficiency and orientation control of optically trapping micro- and nano-particles.
09:12
Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
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Cited by 14 •
2016
A protocol for the colloidal synthesis of silver nanocubes and fabrication of plasmonic nanoscale patch antennas with sub-10 nm gaps is presented.
05:00
Localized Surface Plasmon Resonance Imaging to Detect Protein Secretions from a Single Cell
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2025
This video demonstrates localized surface plasmon resonance imaging to detect protein secretions from a single cell. Using a microfluidic setup and a peptide-bound plasmonic nanostructure chip, changes in reflected light intensity at the resonance angle reveal interactions with secreted proteins from a single cell.
15:06
Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
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Cited by 2 •
2016
Saturable and reverse saturable scattering were discovered in isolated plasmonic particles and adopted as a novel non-bleaching contrast method in super-resolution microscopy. Here the experimental procedures of detecting and extracting nonlinear scattering are explained in detail, as well as how to enhance resolution with the aid of saturated excitation microscopy.
06:58
Surface Plasmon Resonance (SPR)
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2023
Surface plasmon resonance (SPR) is the underlying optical phenomenon behind label-free biosensors to evaluate the molecular affinity, kinetics, specificity, and concentration of biomolecules. In SPR, biomolecular interactions occur on a biosensor made of a thin layer of metal on a prism. Real-time interactions of biomolecules can be monitored by measuring the changes of light reflected off the underside of the metal. This video describes the basic concepts of SPR and how it is used to analyze...
FAQs
These three design factors determine how the structure responds to incident light. Geometry includes features such as nanoparticles, nanoshells, and patterned metal films, while composition and the surrounding medium modify the resonance response. Engineering these variables allows the concentrated electromagnetic field to be positioned or adjusted for a target sensing, spectroscopy, or optical-device function.
Localized near fields concentrate electromagnetic energy close to nanoscale metal features when incident light matches the structure’s localized surface plasmon resonance. This concentration enables optical interactions at dimensions smaller than the wavelength of light. As a result, engineered structures can support sensitive detection, enhanced spectroscopy, and nanoscale manipulation of optical energy.
They provide control of electromagnetic energy at subwavelength scales, where conventional optical components are less effective at miniaturization. This capability supports nanoscale optical components and integrated photonics that connect optical signals with engineered materials and devices. The resulting designs can place optical functions into smaller platforms while retaining resonance-based control of light.
Engineers begin by selecting a structure type, such as a nanoparticle, nanoshell, or patterned metal film, then adjust its geometry, composition, and surrounding medium to control the resonance response. They match the incident light to the desired localized surface plasmon resonance and evaluate the resulting near-field concentration for sensing, spectroscopy, or photothermal performance.
They are useful when a sensor must respond strongly to changes near an engineered metal surface. Resonance-dependent field concentration makes the optical response sensitive to the local environment, supporting chemical and biological sensing applications. By selecting suitable geometry, composition, and surrounding medium, engineers can tailor the resonance behavior to the sensing system under study.
For surface-enhanced spectroscopy, concentrated near fields increase electromagnetic interactions near plasmonic features, supporting stronger spectroscopic signals. In photothermal systems, plasmonic structures provide a way to control and concentrate optical energy near engineered surfaces. These functions illustrate how the same resonance response can be designed for either enhanced measurement or localized energy-related operation.