High displacement sensitivity in asymmetric plasmonic nanostructures.

06:00 EDT 20th August 2010 | BioPortfolio

Summary of "High displacement sensitivity in asymmetric plasmonic nanostructures."

The strong couplings between two asymmetric plasmonic nanostructures can lead to ultra-sensitive optical responses when their separation changes. We employ electromagnetic numerical simulations to study the displacement sensitivity of two kinds of plasmonic systems: (1) a split-ring resonator and a metal rod; (2) two metal rods of asymmetric lengths. Structural asymmetry makes antiparallel current interactions possible and greatly enhances the sensitivity to 5%/nm for normalized frequency changes and 29%/nm for normalized transmittance changes. These are the highest displacement sensitivity among all physical systems investigated so far. In addition, we also find that these systems display a universal scaling curve independent of their shapes or dimensions. These asymmetric plasmonic nanostructures will open widespread applications from strain mapping, surface wave or heat wave imaging, optomechanical sensing, to environmental detections.


Journal Details

This article was published in the following journal.

Name: Optics express
ISSN: 1094-4087
Pages: 18360-7


PubMed Articles [18652 Associated PubMed Articles listed on BioPortfolio]

Tapered optical fiber probe assembled with plasmonic nanostructures for Surface-enhanced Raman Scattering application.

Optical fiber-Raman devices integrated with plasmonic nanostructures have promising potentials for in-situ probing remote liquid samples and biological samples. In this system, the fiber probe is requ...

Highly Sensitive Electro-Plasmonic Switches Based on Fivefold Stellate Polyhedral Gold Nanoparticles.

Electron-photon coupling in metal nanostructures has raised a new trend for active plasmonic switch devices in both fundamental understanding and technological applications. However, low sensitivity s...

Near-field asymmetries in plasmonic resonators.

Surface-enhanced infrared absorption (SEIRA) spectroscopy exploits the locally enhanced field surrounding plasmonic metamaterials to increase the sensitivity of infrared spectroscopy. The light polari...

An Accurate Modelling of Dark-Field Scattering Spectra of Plasmonic Nanostructures.

Dark-field microscopy is a widely used tool for measuring the optical resonance of plasmonic nanostructures. However, current numerical methods for simulating the dark-field scattering spectra were ca...

Largely Enhanced Saturable Absorption of a Complex of Plasmonic and Molecular-Like Au Nanocrystals.

A saturable absorber is a nonlinear functional material widely used in laser and photonic nanodevices. Metallic nanostructures have prominent saturable absorption (SA) at the plasmon resonance frequen...

Clinical Trials [2294 Associated Clinical Trials listed on BioPortfolio]

Fluoroscopy vs. Computed Tomography for Diagnosis of Displacement and Instability of Acute Scaphoid Waist Fractures

Aim: The aim of this study is to analyze if fluoroscopy is as accurate as computed tomography in diagnosing displacement of acute scaphoid waist fractures. Primary null hypothesis:...

Effect of Homocysteine and Asymmetric Dimethylarginine on Cardiovascular Events in Hemodialysis Patients

Homocysteine (Hcy) and asymmetric dimethylarginine (ADMA) have recently been recognized as potential risk factors for atherosclerosis in the general population, and the metabolism of each ...

Assessement of Hemodynamic Changes Associated With Uterine Displacement Using Noninvasive Cardiac Output Monitoring and Transthoracic Echocardiography:

There is currently little information regarding the hemodynamic differences in uterine displacement techniques. Previous studies examining the hemodynamic effects of uterine displacement m...

The Influence of Low Frequency Repetitive Transcranial Stimulation (r-TMS) on Motor and Cognitive Measurements in Patients With Asymmetric Parkinson's Disease

To test the effects of low frequency deep rTMS using the novel H-coil on the motor, affective and cognitive deficits in patients with asymmetric Parkinson's disease (PD) and to establish i...

High Throughput Drug Sensitivity Assay and Genomics- Guided Treatment of Patients With Relapsed or Refractory Acute Leukemia

This clinical trial studies the feasibility of choosing treatment based on a high throughput ex vivo drug sensitivity assay in combination with mutation analysis for patients with acute le...

Medical and Biotech [MESH] Definitions

Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.

Protrusion of the rectal mucous membrane through the anus. There are various degrees: incomplete with no displacement of the anal sphincter muscle; complete with displacement of the anal sphincter muscle; complete with no displacement of the anal sphincter muscle but with herniation of the bowel; and internal complete with rectosigmoid or upper rectum intussusception into the lower rectum.

Materials which have structured components with at least one dimension in the range of 1 to 100 nanometers. These include NANOCOMPOSITES; NANOPARTICLES; NANOTUBES; and NANOWIRES.

Function of the human eye that is used in dim illumination (scotopic intensities) or at nighttime. Scotopic vision is performed by RETINAL ROD PHOTORECEPTORS with high sensitivity to light and peak absorption wavelength at 507 nm near the blue end of the spectrum.

The branch of medicine concerned with the application of NANOTECHNOLOGY to the prevention and treatment of disease. It involves the monitoring, repair, construction, and control of human biological systems at the molecular level, using engineered nanodevices and NANOSTRUCTURES. (From Freitas Jr., Nanomedicine, vol 1, 1999).


Searches Linking to this Article