Electric field analysis, polarization, excitation wavelength dependence, and novel applications of tip‐enhanced Raman scattering

2021 ◽  
Author(s):  
Prompong Pienpinijtham ◽  
Yasutaka Kitahama ◽  
Yukihiro Ozaki
Keyword(s):  
Electric Field ◽  
Raman Scattering ◽  
Wavelength Dependence ◽  
Field Analysis ◽  
Excitation Wavelength ◽  
Enhanced Raman Scattering ◽  
Electric Field Analysis ◽  
Novel Applications ◽  
Excitation Wavelength Dependence

EFFECT OF EXCITATION WAVELENGTH ON THE RAMAN SPECTRUM OF HEXAGONAL DEFECTS IN 4H-SiC

2013 ◽  
Vol 27 (05) ◽  
pp. 1350035 ◽  
Author(s):  
RU HAN ◽  
XIAOYA FAN
Keyword(s):  
Raman Spectrum ◽  
Raman Scattering ◽  
Experimental Error ◽  
Wavelength Dependence ◽  
Excitation Wavelength ◽  
Structure Defects ◽  
Defect Zone ◽  
Electronic Raman Scattering ◽  
Optical Modes ◽  
Excitation Wavelength Dependence

The Raman spectra of 4H- SiC with hexagonal defect have been investigated as a function of the excitation wavelength. As the excitation wavelength increases, the excitation wavelength dependence of Raman spectrum of hexagonal defect is very different from that of the free defect zone in 4H- SiC . Four electronic Raman scattering peaks are seen to be significantly enhanced with longer wavelength excitation. In hexagonal defect, the optical modes ( E 2( TO ), E 1( TO ) and A 1( LO )) and the second-order Raman spectrum are broadened and redshifted as the excitation wavelength increased. But the positions of these bands obtained from the free defect zone do not change within our experimental error. Structure defects are regarded as the origin of those abnormal phenomena in hexagonal defect, and the structure ordering of hexagonal defect may have some similarity with SiC monofilaments.

Transient Electric Field Analysis in Consideration of the Electric Field Dependence of Resistivity in the Converter Transformer

2015 ◽  
Vol 135 (12) ◽  
pp. 731-736
Author(s):  
Takuma Terakura ◽  
Kei Takano ◽  
Takanori Yasuoka ◽  
Shigekazu Mori ◽  
Osamu Hosokawa ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Dependence ◽  
Field Analysis ◽  
Electric Field Dependence ◽  
Electric Field Analysis ◽  
Transient Electric Field

Electric Field Analysis of 220 kV Composite Material Tower Lines

2012 ◽  
Vol 516-517 ◽  
pp. 1517-1520
Author(s):  
Jian Xun Hu ◽  
Gong Da Zhang ◽  
Hong Yu Zhang ◽  
Xiao Qin Zhang
Keyword(s):  
Composite Material ◽  
Electric Field ◽  
Field Distribution ◽  
Transmission Lines ◽  
Electric Field Distribution ◽  
Field Analysis ◽  
Electric Field Effect ◽  
Transmission Tower ◽  
Element Analysis ◽  
Electric Field Analysis

Using the finite element analysis, this work analyzed the electric field distribution of 220kV transmission steel tower with double-circuit and composite material transmission tower with the same size, and compared the electric field effect of two materials transmission tower for surroundings. And this work compared the vertical and axial electric field distribution along transmission line of the two materials transmission tower. The results indicate the composite material tower can improve the environment of electric field near the transmission lines.

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