Polarized light reflectance and the sub-diffuse regime during optical imaging of skin

2021 ◽  
Author(s):  
Steven L. Jacques ◽  
Ben Urban ◽  
Hrebesh M. Subhash
Keyword(s):  
Optical Imaging ◽  
Polarized Light ◽  
Light Reflectance

Determination of porous silicon film parameters by polarized light reflectance measurements

1993 ◽  
Vol 233 (1-2) ◽  
pp. 131-136 ◽  
Author(s):  
P. Basmaji ◽  
V.S. Bagnato ◽  
V. Grivickas ◽  
G.I. Surdutovich ◽  
R. Vitlina
Keyword(s):  
Porous Silicon ◽  
Silicon Film ◽  
Polarized Light ◽  
Light Reflectance ◽  
Reflectance Measurements

scholarly journals The Field-Induced Stop-Bands and Lasing Modes in CLC Layers with Deformed Lying Helix

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 469 ◽  
Author(s):  
Palto
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Cholesteric Liquid Crystal ◽  
Polarized Light ◽  
Helical Structure ◽  
Helix Axis ◽  
Light Reflectance ◽  
Lower Extent ◽  
Lasing Modes ◽  
Difference Time

Waveguide optical properties of a cholesteric liquid crystal (CLC) layer with a deformed lying helix (DLH) have been studied by numerical simulations using the finite difference time domain method. The DLH structure, when the helix’s axis is oriented in plane of a CLC layer, is induced by an electric field in a virtual CLC cell with periodic (planar/homeotropic) boundary conditions at one of the alignment surfaces. This in-plane helical structure is stable only in a permanently applied electric field providing the helix deformation. In this work the polarized light reflectance spectra have been studied at different electric fields and light impingement into a waveguide formed by the DLH layer. It is found that for light propagating along the helix axis the reflectance spectrum has multiple stop-bands centred at wavelengths , which is different from set of bands located at , and characteristic of CLC spectra for the Grandjean-plane textures subjected to distortion by an electric or magnetic field perpendicular to the helix axis, where j is a natural number, p is the helix pitch and is the average refractive index. Each of the higher order (j > 1) bands consists of three polarization-dependent sub-bands. In the case of an amplifying CLC DLH layer, depending on an extent of the helix deformation, the lasing modes can be excited at different edges of the sub-bands. While at the strongest deformation the lasing is preferable at the edges of the central sub-band; a lower extent of deformation makes favourable conditions for the lasing at edges of the two other sub-bands.

scholarly journals Laser Nanostructuring for Diffraction Grating Based Surface Plasmon-Resonance Sensors

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 591
Author(s):  
Iaroslav Gnilitskyi ◽  
Sergii V. Mamykin ◽  
Christina Lanara ◽  
Ihor Hevko ◽  
Mykhaylo Dusheyko ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Au Nanoparticles ◽  
Polarized Light ◽  
Surface Structures ◽  
Periodic Surface ◽  
Au Nps ◽  
Resonance Properties ◽  
Light Reflectance

The surface plasmon resonance properties of highly regular laser-induced periodic surface structures (HR-LIPSSs) on Si, functionalized with Au nanoparticles (NPs), were investigated. In particular, the spectral dependencies of polarized light reflectance at various angles of incidence were measured and discussed. It is found that the deposition of Au NPs on such periodically textured substrates leads to significant enhancement of the plasmon resonance properties, compared to that measured on planar ones. This effect can be used to improve the efficiency of localized-plasmon-resonance-based sensors.

scholarly journals Elliptically polarized light for depth resolved optical imaging

2012 ◽  
Vol 3 (11) ◽  
pp. 2907 ◽  
Author(s):  
Anabela Da Silva ◽  
Carole Deumié ◽  
Ivo Vanzetta
Keyword(s):  
Optical Imaging ◽  
Polarized Light ◽  
Elliptically Polarized Light ◽  
Elliptically Polarized
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