The effect of incident light polarization on spectralon BRDF measurements

2004 ◽  
Author(s):  
Georgi T. Georgiev ◽  
James J. Butler
Keyword(s):  
Incident Light ◽  
Light Polarization

Optical Characterization of Si Nanowires: Dependence with Substrate Orientation and Light Polarization

2014 ◽  
Vol 1666 ◽  
Author(s):  
Juan A. Badán ◽  
Ricardo E. Marotti ◽  
Enrique A. Dalchiele ◽  
Daniel Ariosa ◽  
Francisco Martín ◽  
...  
Keyword(s):  
Self Assembly ◽  
Diffuse Reflectance ◽  
Incident Light ◽  
Light Polarization ◽  
Nanowire Arrays ◽  
Angle Of Incidence ◽  
Interference Effects ◽  
Si Nanowires ◽  
Total Reflectance

ABSTRACTOptical properties of Si nanowire arrays (SiNWs) prepared on p-doped Si(111) and Si(100) substrates are studied. The SiNWs were synthesized by self-assembly electroless metal deposition nanoelectrochemistry in an ionic silver HF solution through selective etching. Total reflectance (Rt) and total diffuse reflectance (Rdt) of SiNWs change drastically in comparison to polished Si. To understand these changes diffuse reflectance (Rd) with polarized incident light was studied. For samples prepared on Si(111), the wavelength integrated Rd (wIRd) shows maxima at certain angle of incidence θ and it does not depend on light polarization. Moreover, Rdt of SiNWs prepared on Si(111) can be modeled as an ensemble of diffuse reflectors. For samples prepared on Si(100) wIRd increases with θ, being greater when the light electric field is parallel to the plane of incidence. Also, Rd spectra show structures due to interference effects. For these reasons SiNWs prepared on Si(100) can be considered as a thin film whose refractive index depends on light polarization.

Effects of incident light polarization on optical transmittance through subwavelength metal holes arrays

Optik ◽  
2013 ◽  
Vol 124 (15) ◽  
pp. 2020-2022 ◽  
Author(s):  
Hu Luo ◽  
Xinlin Wang ◽  
Ming Wen ◽  
Zhiyong Chen ◽  
Wei Guo ◽  
...  
Keyword(s):  
Incident Light ◽  
Optical Transmittance ◽  
Light Polarization

Polarization Dependent Photocurrent in Thin Film Polydiacetylene Single Crystals

1992 ◽  
Vol 247 ◽  
Author(s):  
Y. Yang ◽  
J. Y. Lee ◽  
L. Li ◽  
J. Kumar ◽  
A. K. Jain ◽  
...  
Keyword(s):  
Thin Film ◽  
Steady State ◽  
Single Crystals ◽  
Incident Light ◽  
Light Polarization ◽  
Sample Temperature

ABSTRACTThe photocurrent behavior in polydiacetylene (PDA) single crystals of PTS (poly-(2, 4-hexadiyne-1, 6-diol bis(p-toluenesulfonate)) and MADF (poly-(1-(3-(methylamino)phenyl)-4-(3, 5-bis (trifluoromethyl)-phenyl) butadiyne)) have been investigated by using steady state photoconductivity measurements. These measurements were carried out as a function of sample temperature and incident light polarization. PTS and MADF show completely different behavior in these measurements. These differences between PTS and MADF suggest that the side groups of PDA strongly influence the photocurrent behavior in PDA.

Steady State and Transient Photoconductivity of Thin Film Polydiacetylene Single Crystals

1990 ◽  
Vol 214 ◽  
Author(s):  
Y. Yang ◽  
J. Y. Lee ◽  
P. Miller ◽  
L. Li ◽  
J. Kumar ◽  
...  
Keyword(s):  
Thin Film ◽  
Steady State ◽  
Single Crystals ◽  
Drift Velocity ◽  
Incident Light ◽  
Light Polarization ◽  
Transport Mechanisms ◽  
Carrier Generation ◽  
Electric Field Dependence ◽  
Transient Photoconductivity

ABSTRACTCharge carrier generation and transport mechanisms in polydiacetylene thin film single crystals., poly-PTS (2,4-hexadiyne-1,6-diol bis(p-toluenesulfonate)) and poly- BTFP (bis-(4-n-butyl-2,3,5,6-tetra-fluorophenyl) butadiyne), are studied by using steady state and transient photoconductivity techniques. The electric field dependence of the steady state photocurrent is superlinear for both samples. Dependence of photocurrent on incident light polarization has been investigated. The polarization dependence of photocurrent has completely different behavior for the polydiacetylene PTS and BTFP. Single-gap transmission line experiment has been designed to directly measure the drift velocity of PTS single crystals. A drift velocity of the order of 106cm/s was measured.

scholarly journals Full-range birefringence control with piezoelectric MEMS-based metasurfaces

2021 ◽  
Author(s):  
Chao Meng ◽  
Paul Thrane ◽  
Fei Ding ◽  
Sergey Bozhevolnyi
Keyword(s):  
Optical Networks ◽  
Incident Light ◽  
Full Range ◽  
Micro Electro Mechanical System ◽  
Light Polarization ◽  
Electrical Control ◽  
Polarization Control ◽  
Operating Wavelength ◽  
Conversion Efficiencies ◽  
Dynamic Wave

Abstract Dynamic polarization control is crucial for emerging highly integrated photonic systems with diverse metasurfaces being explored for its realization1–6, but efficient, fast, and broadband operation remains a cumbersome challenge. While efficient optical metasurfaces (OMSs) involving liquid crystals suffer from inherently slow responses1, other OMS realizations are limited either in the operating wavelength range (due to resonances involved)2,3 or in the range of birefringence tuning4–6. Capitalizing on our development of piezoelectric micro-electro-mechanical system (MEMS) based dynamic OMSs7, we demonstrate reflective MEMS-OMS dynamic wave plates (DWPs) with high polarization conversion efficiencies (~ 75%), broadband operation (~ 100 nm near the operating wavelength of 800 nm), fast responses (< 0.4 milliseconds) and full-range birefringence control that enables completely encircling the Poincaré sphere along trajectories determined by the incident light polarization and DWP orientation. Demonstrated complete electrical control over light polarization opens new avenues in further integration and miniaturization of optical networks and systems8,9.

Optimization of Incident Light Polarization State in Pressure Sensing Based on Fiber Polarization Properties

2020 ◽  
Vol 40 (14) ◽  
pp. 1406001
Author(s):  
苏洋 Su Yang ◽  
张超 Zhang Chao ◽  
王艺敏 Wang Yimin ◽  
汪井源 Wang Jingyuan ◽  
周华 Zhou Hua
Keyword(s):  
Incident Light ◽  
Polarization State ◽  
Light Polarization ◽  
Pressure Sensing
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