Magneto-Optic Indicator Films for Forensics

2011 ◽  
Vol 1291 ◽  
Author(s):  
Charles Krafft ◽  
Sergiy Tkachuk ◽  
Garrett Lang ◽  
David Bowen ◽  
Isaak. D. Mayergoyz
Keyword(s):  
Faraday Rotation ◽  
Plasmon Resonance ◽  
Au Nanoparticles ◽  
Resonance Effect ◽  
Easy Plane ◽  
Grown Film ◽  
Garnet Films ◽  
Optimal Imaging ◽  
Magneto Optic

ABSTRACTGarnet films based on (BiPrGdLu) (FeGa) have been grown on (210) and (100) oriented SGGG substrates. (210) films with an easy plane of magnetization provided optimal imaging contrast. Incorporation of Au nanoparticles into an epitaxially grown film was done and these films show an increase in Faraday rotation, ostensibly due to the plasmon resonance effect.

scholarly journals Synergism of carbon quantum dots and Au nanoparticles with Bi2MoO6 for activity enhanced photocatalytic oxidative degradation of phenol

RSC Advances ◽  
2021 ◽  
Vol 11 (46) ◽  
pp. 28674-28684
Author(s):  
Qiang Zhao ◽  
Zhuangzhuang Zhang ◽  
Ting Yan ◽  
Li Guo ◽  
Chunming Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Plasmon Resonance ◽  
Au Nanoparticles ◽  
Resonance Effect ◽  
Oxidative Degradation ◽  
Photogenerated Electron ◽  
Carbon Quantum Dots ◽  
Carbon Quantum Dot ◽  
And Migration

Carbon quantum dot up-conversion emission and Au plasmon resonance effect synergetically promote the separation and migration of photogenerated electron e−/h+ pairs of Bi2MoO6, achieving efficient ROS for phenol photocatalytic mineralization.

Enhanced blue emission from CsPb(Br/Cl)3 perovskite nanocrystals by localized surface plasmon resonance of Au nanoparticles

2021 ◽  
Vol 9 (15) ◽  
pp. 5182-5189
Author(s):  
Liang Bao ◽  
Wenqiang Liu ◽  
Yonghua Chen ◽  
Yanbo Zhang ◽  
Yang Zhang
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Au Nanoparticles ◽  
Resonance Effect ◽  
Blue Emission ◽  
Localized Surface Plasmon ◽  
Local Surface Plasmon Resonance ◽  
Inorganic Systems ◽  
Powerful Approach

The local surface plasmon resonance effect induced by metal nanoparticles on perovskites provides a powerful approach to enhance the photoluminescence of such all-inorganic systems.

Application of Magnetic Garnet Films for Magnetooptical Imaging of Magnetic Field Distributions

2004 ◽  
Vol 834 ◽  
Author(s):  
H. Dötsch ◽  
C. Holthaus ◽  
A. Trifonov ◽  
M. Klank ◽  
O. Hagedorn ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Faraday Rotation ◽  
Dynamic Range ◽  
Uniaxial Anisotropy ◽  
High Sensitivity ◽  
Bias Field ◽  
Film Plane ◽  
Easy Plane ◽  
Experimental Results ◽  
Garnet Films

ABSTRACTRare-earth iron garnet films of high quality can be grown by liquid phase epitaxy on paramagnetic substrates of gadolinium galliumgarnet. Such films are currently used for imaging of the spatial distribution of magnetic fields. This application is based on the Faraday rotation which can strongly be enhanced by bismuth incorporation.The physical properties of the films can be controlled by the chemical composition, the growth conditions and the crystallographic orientation. The sensor properties like sensitivity, dynamic range, signal linearity and unambiguity must be optimized according to the application desired. These properties, however, are not independent of each other. In addition, they strongly depend on the optical wavelength. Thus, it is necessary to find compromises.The influence of Faraday rotation, Faraday ellipticity, optical absorption, magnetic anisotropies and film thickness on the performance of a magnetooptical indicator film is investigated. Based on the swing of the photoresponse, a new optimization process is introduced. The process is experimentally verified and application examples are demonstrated.Furthermore, two methods are presented to enhance the sensitivity of magnetooptical sensors. Using specific crystallographic orientations, an easy plane of magnetization can be induced which is inclined with respect to the film plane. If the magnetization lies in this plane a very high sensitivity is achieved. The dependence of the geometrical orientation of the easy plane on the growth direction is calculated and the sensitivity and dynamic range are derived. Experimental results of a [112] oriented garnet film are in good agreement with calculations.Garnet films which are magnetized along the film normal due to a strong induced uniaxial anisotropy support magnetic domains. If the collapse field perpendicular to the film plane is small, such films can be used as very sensitive indicator films. Such films are easier to prepare than sensitive in-plane films. However, the spatial resolution is limited by the size of the domains. This disadvantage can be avoided by applying a bias field in the film plane. Directly at the in-plane collapse field the sensor film is in-plane magnetized yielding high spatial resolution at still high sensitivity. The variation of magnetooptical images with in-plane induction is demonstrated. Experimental results are in agreement with calculations.

Efficacy of ion irradiation in strengthening the surface plasmon resonance effect of Au nanoparticles

2020 ◽  
Vol 21 ◽  
pp. 100633
Author(s):  
Satakshi Gupta ◽  
Vikesh Chaudhary ◽  
Amena Salim ◽  
Ritu Vishnoi ◽  
Jyotsna Bhardwaj ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Au Nanoparticles ◽  
Ion Irradiation ◽  
Resonance Effect ◽  
Surface Plasmon Resonance Effect

Plasmon resonance enhancement of Faraday rotation in thin garnet films

2011 ◽  
Vol 109 (7) ◽  
pp. 07B717 ◽  
Author(s):  
S. Tkachuk ◽  
G. Lang ◽  
C. Krafft ◽  
O. Rabin ◽  
I. Mayergoyz
Keyword(s):  
Faraday Rotation ◽  
Plasmon Resonance ◽  
Garnet Films ◽  
Resonance Enhancement

Observation of Enhanced Faraday Effect in Garnet-Based Magnetophotonic Crystals

2004 ◽  
Vol 834 ◽  
Author(s):  
A. A. Fedyanin ◽  
D. Kobayashi ◽  
K. Nishimura ◽  
H. Uchida ◽  
M. Inoue ◽  
...  
Keyword(s):  
Faraday Rotation ◽  
Faraday Effect ◽  
Silicon Oxide ◽  
Photonic Band Gap ◽  
One Dimensional ◽  
Garnet Films ◽  
Faraday Rotation Angle ◽  
Magnetophotonic Crystals ◽  
Iron Garnet ◽  
Photonic Band

ABSTRACTThe fabrication of one-dimensional magnetophotonic crystals (MPC) composed from Bi-substituted yttrium-iron-garnet films separated by the silicon oxide layers is presented. The enhancement of the Faraday rotation angle is observed at the spectral regions of the photonic band gap edges. The effective Faraday rotation achieves the values up to 1.5 degrees per micron at 1100-nm-wavelength.

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