Linear and Polygonal Assemblies of Plasmonic Nanoparticles: Incident Light Polarization Dictates Hot Spots

2016 ◽  
Vol 120 (33) ◽  
pp. 18733-18740 ◽  
Author(s):  
Reshmi Thomas ◽  
R. S. Swathi
Keyword(s):  
Hot Spots ◽  
Incident Light ◽  
Light Polarization ◽  
Plasmonic Nanoparticles

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.

scholarly journals Boosting Hot Electron-Driven Photocatalysis through Anisotropic Plasmonic Nanoparticles with Hot Spots in Au–TiO2 Nanoarchitectures

2016 ◽  
Vol 120 (21) ◽  
pp. 11690-11699 ◽  
Author(s):  
Ana Sousa-Castillo ◽  
Miguel Comesaña-Hermo ◽  
Benito Rodríguez-González ◽  
Moisés Pérez-Lorenzo ◽  
Zhiming Wang ◽  
...  
Keyword(s):  
Hot Spots ◽  
Plasmonic Nanoparticles ◽  
Hot Electron

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.

Use of fluorescence signals generated by elastic scattering under monochromatic incident light for determining the scattering efficiencies of various plasmonic nanoparticles

The Analyst ◽  
2016 ◽  
Vol 141 (15) ◽  
pp. 4632-4639 ◽  
Author(s):  
Ji Eun Song ◽  
Ji Hoon Park ◽  
Ju A. La ◽  
Seyeon Park ◽  
Min Kuk Jeong ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Incident Light ◽  
Plasmonic Nanoparticles

Fluorescence signals generated by elastic scattering under monochromatic incident light are useful for determining scattering efficiencies of various plasmonic nanoparticles.

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