Enhancement of surface plasmon resonances on nonlinear optical properties in spherical dome semiconductor nanoshells

2018 ◽  
Vol 122 ◽  
pp. 394-403 ◽  
Author(s):  
Tao Yang ◽  
Kangxian Guo ◽  
Guanghui Liu ◽  
Yanlian Yang ◽  
Keyin Li ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Plasmon ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Surface Plasmon Resonances ◽  
Spherical Dome ◽  
Plasmon Resonances

scholarly journals Space- and time-resolved second harmonic spectroscopy of coupled plasmonic nanocavities

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Adi Salomon ◽  
Heiko Kollmann ◽  
Manfred Mascheck ◽  
Slawa Schmidt ◽  
Yehiam Prior ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Plasmon ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Hot Spot ◽  
Localized Surface Plasmon ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Plasmon Resonances ◽  
Linear And Nonlinear

Abstract Localized surface plasmon resonances of individual sub-wavelength cavities milled in metallic films can couple to each other to form a collective behavior. This coupling leads to a delocalization of the plasmon field at the film surface and drastically alters both the linear and nonlinear optical properties of the sample. In periodic arrays of nanocavities, the coupling results in the formation of propagating surface plasmon polaritons (SPP), eigenmodes extending across the array. When artificially introducing dislocations, defects and imperfections, multiple scattering of these SPP modes can lead to hot-spot formation, intense and spatially confined fluctuations of the local plasmonic field within the array. Here, we study the underlying coupling effects by probing plasmonic modes in well-defined individual triangular dimer cavities and in arrays of triangular cavities with and without artificial defects. Nonlinear confocal spectro-microscopy is employed to map the second harmonic (SH) radiation from these systems. Pronounced spatial localization of the SPP field and significant enhancements of the SH intensity in certain, randomly distributed hot spots by more than an order of magnitude are observed from the triangular arrays as compared to a bare silver film by introducing a finite degree of disorder into the array structure. Hot-spot formation and the resulting enhancement of the nonlinear efficiency are correlated with an increase in the lifetime of the localized SPP modes. By using interferometric SH autocorrelation measurements, we reveal lifetimes of hot-spot resonances in disordered arrays that are much longer than the few-femtosecond lifetimes of the localized surface plasmon resonances of individual nanocavity dimers. This suggests that hot spot lifetime engineering provides a path for manipulating the linear and nonlinear optical properties of nanosystems by jointly exploiting coherent couplings and tailored disorder.

Surface Plasmon Resonances, Optical Properties, and Electrical Conductivity Thermal Hystersis of Silver Nanofibers Produced by the Electrospinning Technique

Langmuir ◽  
2008 ◽  
Vol 24 (20) ◽  
pp. 11982-11987 ◽  
Author(s):  
Nasser A. M. Barakat ◽  
Kee-Do Woo ◽  
Muzafar A. Kanjwal ◽  
Kyung Eun Choi ◽  
Myung Seob Khil ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Optical Properties ◽  
Surface Plasmon ◽  
Surface Plasmon Resonances ◽  
Electrospinning Technique ◽  
Plasmon Resonances

scholarly journals Unconventional Optical Response in Engineered Au-Ag Nanostructures

2019 ◽  
Author(s):  
Dev Kumar Thapa ◽  
Subham Kumar Saha ◽  
Guru Pratheep Rajasekar ◽  
Biswajit Bhattacharyya ◽  
Rekha Mahadevu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Plasmon ◽  
Mie Theory ◽  
Localized Surface Plasmon ◽  
Silver Particles ◽  
Temperature Dependent ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Plasmon Resonances ◽  
Diamagnetic State

This article describes the optical properties of nanostructures composed of silver particles embedded into a gold matrix. In previous studies these materials were shown to exhibit temperature dependent transitions to a highly conductive and strongly diamagnetic state. Here we describe the anomalous optical properties of these nanostructures. Most notably, these materials fail to obey Mie theory and exhibit an unconventional resonance with a maximum at about 4 eV, while the usual gold and silver localized surface plasmon resonances are suppressed. This effect implies a significant deviation from the bulk dielectric functions of gold and silver. We further resolved this resonance into its absorbance and scattering sub-parts. It is observed that the resonance is largely comprised of scattering, with negligible losses even at ultraviolet frequencies.

scholarly journals Multiple surface plasmon resonances enhanced nonlinear optical microscopy

Nanophotonics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 487-493 ◽  
Author(s):  
Xiaohu Mi ◽  
Yuyang Wang ◽  
Rui Li ◽  
Mengtao Sun ◽  
Zhenglong Zhang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Optical Microscopy ◽  
Surface Plasmon ◽  
Nonlinear Optical ◽  
Surface Plasmon Resonances ◽  
Nonlinear Optical Microscopy ◽  
Two Photon ◽  
Plasmon Resonances ◽  
Anti Stokes ◽  
Multiple Surface Plasmon Resonances

AbstractThe nonlinear optical microscopies of coherent two-photon excited fluorescence and anti-Stokes Raman scattering are strongly enhanced by multiple surface plasmon resonances (MSPRs). The Au@Ag nanorods presented strong MSPRs peaks at 800 and 400 nm, and can enhance nonlinear optical microscopy at fundamental and double frequencies, respectively. A two-dimensional (2D) material of g-C3N4 is employed to study the plasmon-enhanced nonlinear optical microscopy by the femtosecond laser. The electric analysis reveals that the MSPRs of the Au@Ag nanorod can significantly enhance the signals of two-photon excited fluorescence and anti-Stokes Raman scattering by up to the orders of 104 and 1016, respectively. The results demonstrate the great advantages of plasmon-enhanced nonlinear optical microscopy for the optical analysis on 2D materials, thus providing a new adventure for increasing the optical resolutions of nonlinear optical microscopy.

Controlled surface-plasmon coupling in SiO2-coated gold nanochains for tunable nonlinear optical properties

2006 ◽  
Vol 88 (8) ◽  
pp. 081110 ◽  
Author(s):  
Yong Yang ◽  
Masayuki Nogami ◽  
Jianlin Shi ◽  
Hangrong Chen ◽  
Guohong Ma ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Plasmon ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Plasmon Coupling ◽  
Surface Plasmon Coupling ◽  
Gold Nanochains

scholarly journals Unconventional Optical Response in Engineered Au-Ag Nanostructures

2019 ◽  
Author(s):  
Dev Kumar Thapa ◽  
Subham Kumar Saha ◽  
Guru Pratheep Rajasekar ◽  
Biswajit Bhattacharyya ◽  
Rekha Mahadevu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Plasmon ◽  
Mie Theory ◽  
Localized Surface Plasmon ◽  
Silver Particles ◽  
Temperature Dependent ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Plasmon Resonances ◽  
Diamagnetic State

This article describes the optical properties of nanostructures composed of silver particles embedded into a gold matrix. In previous studies these materials were shown to exhibit temperature dependent transitions to a highly conductive and strongly diamagnetic state. Here we describe the anomalous optical properties of these nanostructures. Most notably, these materials fail to obey Mie theory and exhibit an unconventional resonance with a maximum at about 4 eV, while the usual gold and silver localized surface plasmon resonances are suppressed. This effect implies a significant deviation from the bulk dielectric functions of gold and silver. We further resolved this resonance into its absorbance and scattering sub-parts. It is observed that the resonance is largely comprised of scattering, with negligible losses even at ultraviolet frequencies.

Surface Plasmon Assisted Enhancement in the Nonlinear Optical Properties of Phenothiazine by Gold Nanoparticle

2017 ◽  
Vol 121 (48) ◽  
pp. 26976-26986 ◽  
Author(s):  
Shiju Edappadikkunnummal ◽  
Siji Narendran Nherakkayyil ◽  
Vasudevan Kuttippurath ◽  
Divyasree Manathanathu Chalil ◽  
Narayana Rao Desai ◽  
...  
Keyword(s):  
Optical Properties ◽  
Gold Nanoparticle ◽  
Surface Plasmon ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties
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