Periodic Arrays of Dewetted Silver Nanostructures on Sapphire and Quartz: Effect of Substrate Truncation on the Localized Surface Plasmon Resonance and Near-Field Enhancement

2019 ◽  
Vol 123 (32) ◽  
pp. 19879-19886 ◽  
Author(s):  
Trevor B. Demille ◽  
Robert A. Hughes ◽  
Svetlana Neretina
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Near Field ◽  
Field Enhancement ◽  
Localized Surface Plasmon ◽  
Silver Nanostructures ◽  
Periodic Arrays

scholarly journals High Near-Field Enhancement in Plasmonic Coupled Nanostructure for Spaser Application

2021 ◽  
Author(s):  
SAQIB JAMIL ◽  
Adnan Daud Khan ◽  
Javed Iqbal ◽  
Waqas Farooq
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Near Field ◽  
Field Enhancement ◽  
Surface Enhanced Raman Spectroscopy ◽  
Localized Surface Plasmon ◽  
Film Substrate ◽  
Gain Media

Abstract We theoretically demonstrated a kind of plasmon coupled elliptical nanostructure to achieve a vast range of applications based on nanolaser or spaser with high intensity. To overcome the ohmic losses, the plasmon ellipse is composed of the gold film substrate with a gain media. A simple ellipse has been chosen from which variety of dimer configurations have been formed by symmetry alteration technique which are then tested for different light polarizations and gap variations. The proposed model supports localized surface plasmon resonance mode (LSPR). Moreover, the localized surface plasmon resonance (LSPR) property of the proposed nanostructure is numerically analysed by the finite-element method (FEM) and the results shows that the electric field intensity (EFI) can be amplified to a large values by symmetry breaking in the elliptical nanostructure. Various plasmon modes can be excited by selecting the appropriate gain media. In addition to this, a compact tunable multi-wavelength nanolaser (spaser) can be developed by using this model. Giant near field enhancement (NFE) and high LSPR enable this structure to be promising for spaser applications such as surface enhanced Raman spectroscopy, sensing, lithography, imaging, dental applications and much more.

Localized surface plasmon resonance shift and its application in scanning near-field optical microscopy

2021 ◽  
Author(s):  
Jiawei Zhang ◽  
Gitanjali Kolhatkar ◽  
Andreas Ruediger
Keyword(s):  
Raman Spectroscopy ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Near Field ◽  
Localized Surface Plasmon ◽  
Resonance Shift ◽  
Raman Modes ◽  
Tip Enhanced Raman Spectroscopy

The localized surface plasmon resonance (LSPR) position in tip-enhanced Raman spectroscopy (TERS) is of great importance to the understanding and interpretation of the relative intensity of different enhanced Raman modes....

Characteristics of Localized Surface Plasmon Resonance of Nanostructured Au Patterns for Biosensing

2008 ◽  
Vol 8 (9) ◽  
pp. 4548-4552 ◽  
Author(s):  
Jeong Seon Yu ◽  
Minsik Kim ◽  
Sanghoon Kim ◽  
Dong Han Ha ◽  
Bong Hyun Chung ◽  
...  
Keyword(s):  
Particle Size ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Absorption Signal ◽  
Periodic Arrays ◽  
Au Particle Size ◽  
Opening Up

Periodic arrays of pseudotetrahedal-shaped gold nanoparticles were fabricated using nanosphere lithography (NSL) and examined for localized surface plasmon resonance (LSPR). The dependence of the LSPR on particle size of the periodic gold nanostructures was explored for potential application as a new biosensor. With increasing size and height of the Au nanoparticles, the absorption peak of the LSPR shifts to the longer wavelength and becomes relatively sharper. With thinner metal deposition or finer Au nanostructure, the absorption signal varies more sensitively for the changes in the Au particle size. The binding affinity study for biotin-streptavidine system on the Au nanopatterns resulted in blue-shifted absorption signal, opening up the possibility of the nanostructured Au pattern as a new LSPR biosensor.

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