Effect of hexagonal warping of the Fermi surface on the thermoelectric properties of a topological insulator irradiated with linearly polarized radiation

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
Tarun Choudhari ◽  
Nivedita Deo
Keyword(s):  
Fermi Surface ◽  
Thermoelectric Properties ◽  
Topological Insulator ◽  
Linearly Polarized ◽  
Linearly Polarized Radiation ◽  
Polarized Radiation

scholarly journals Formation of Inverse Energy Flux in the Case of Diffraction of Linearly Polarized Radiation by Conventional and Generalized Spiral Phase Plates

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 283
Author(s):  
Andrey Ustinov ◽  
Svetlana Khonina ◽  
Alexey Porfirev
Keyword(s):  
Energy Flux ◽  
Poynting Vector ◽  
Numerical Study ◽  
Longitudinal Component ◽  
Light Fields ◽  
Linearly Polarized ◽  
Linearly Polarized Radiation ◽  
Phase Plates ◽  
Spiral Phase ◽  
Polarized Radiation

Recently, there has been increased interest in the shaping of light fields with an inverse energy flux to guide optically trapped nano- and microparticles towards a radiation source. To generate inverse energy flux, non-uniformly polarized laser beams, especially higher-order cylindrical vector beams, are widely used. Here, we demonstrate the use of conventional and so-called generalized spiral phase plates for the formation of light fields with an inverse energy flux when they are illuminated with linearly polarized radiation. We present an analytical and numerical study of the longitudinal and transverse components of the Poynting vector. The conditions for maximizing the negative value of the real part of the longitudinal component of the Poynting vector are obtained.

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