Spectral selective absorption enhancement from stacked ultra-thin InGaAs/Si Fano resonance membranes

2012 ◽  
Author(s):  
Arvinder Singh Chadha ◽  
Weiquan Yang ◽  
Tapas K. Saha ◽  
Santhad Chuwongin ◽  
Yichen Shuai ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Absorption Enhancement ◽  
Selective Absorption

Squaramide-based lab-on-a-molecule for the detection of silver ion and nitroaromatic explosives

RSC Advances ◽  
2015 ◽  
Vol 5 (117) ◽  
pp. 96665-96669 ◽  
Author(s):  
Bo Shan ◽  
Yunfei Liu ◽  
Rui Shi ◽  
Shaohua Jin ◽  
Lijie Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silver Ion ◽  
Absorption Enhancement ◽  
Selective Absorption ◽  
Nitroaromatic Explosives ◽  
Emission Quenching

A squaramide based lab-on-a-molecule showed selective absorption enhancement and emission quenching towards Ag+ and nitroaromatic explosives, respectively in aqueous solution.

scholarly journals Light dependent morphological changes can tune light absorption in iridescent plant chloroplasts

2020 ◽  
Author(s):  
Miguel A. Castillo ◽  
William P. Wardley ◽  
Martin Lopez-Garcia
Keyword(s):  
Light Scattering ◽  
Light Absorption ◽  
Morphological Changes ◽  
Absorption Enhancement ◽  
Selective Absorption ◽  
Dynamic Changes ◽  
Scattering Effects ◽  
Changing Light ◽  
Realistic Data ◽  
Blue Reflectance

AbstractChloroplasts, the organelles responsible for photosynthesis in most plants and algae, exhibit a variety of morphological adaption strategies to changing light environments which can have important yet overlooked light scattering effects. This can be even more significant for iridoplasts, specialized chloroplasts whose tissue is arranged as a photonic multilayer producing a characteristic strong blue reflectance associated to a wavelength selective absorption enhancement relevant for photosynthesis.In this work, we study how the photonic properties of iridoplasts are affected by light induced dynamic changes using realistic data extracted from previous reports. Our results show a reflectance red-shift from blue to green under increasing light intensity. Consequently, the light absorption enhancement induced by the photonic nanostructure is also redshifted. We also show that the photonic properties are resilient to biologically realistic levels of disorder in the structure. We extended this analysis to another photonic nanostructure-containing chloroplast, known as a bisonoplast, and found similar results, pointing towards similar properties in different plant species. We finally found that all types of chloroplasts can tune light absorption depending on light conditions. In general, our study opens the door to understanding how dynamic morphologies in chloroplasts can affect light scattering and absorption.

Wavelength‐selective absorption enhancement in thin‐film solar cells

1983 ◽  
Vol 43 (6) ◽  
pp. 579-581 ◽  
Author(s):  
Ping Sheng ◽  
A. N. Bloch ◽  
R. S. Stepleman
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Thin Film Solar Cells ◽  
Absorption Enhancement ◽  
Selective Absorption

scholarly journals Selective absorption enhancement in organic solar cells using light incoupling layers

2010 ◽  
Vol 107 (5) ◽  
pp. 053117 ◽  
Author(s):  
Jan Meiss ◽  
Mauro Furno ◽  
Steffen Pfuetzner ◽  
Karl Leo ◽  
Moritz Riede
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Absorption Enhancement ◽  
Selective Absorption

Plasmon-assisted interaction of Si with light, for cancer hyperthermia and electromagnetic energy harvest

2020 ◽  
Vol 92 (2) ◽  
pp. 20101
Author(s):  
Behnam Kheyraddini Mousavi ◽  
Morteza Rezaei Talarposhti ◽  
Farshid Karbassian ◽  
Arash Kheyraddini Mousavi
Keyword(s):  
Silicon Nanowires ◽  
Metallic Nanoparticles ◽  
Near Infrared ◽  
Optical Transition ◽  
Electromagnetic Energy ◽  
Energy Harvest ◽  
Absorption Enhancement ◽  
Ir Absorption ◽  
Absorption Mechanism ◽  
Near Ir

Metal-assisted chemical etching (MACE) is applied for fabrication of silicon nanowires (SiNWs). We have shown the effect of amorphous sheath of SiNWs by treating the nanowires with SF6 and the resulting reduction of absorption bandwidth, i.e. making SiNWs semi-transparent in near-infrared (IR). For the first time, by treating the fabricated SiNWs with copper containing HF∕H2O2∕H2O solution, we have generated crystalline nanowires with broader light absorption spectrum, up to λ = 1 μm. Both the absorption and photo-luminescence (PL) of the SiNWs are observed from visible to IR wavelengths. It is found that the SiNWs have PL at visible and near Infrared wavelengths, which may infer presence of mechanisms such as forbidden gap transitions other can involvement of plasmonic resonances. Non-radiative recombination of excitons is one of the reasons behind absorption of SiNWs. Also, on the dielectric metal interface, the absorption mechanism can be due to plasmonic dissipation or plasmon-assisted generation of excitons in the indirect band-gap material. Comparison between nanowires with and without metallic nanoparticles has revealed the effect of nanoparticles on absorption enhancement. The broader near IR absorption, paves the way for applications like hyperthermia of cancer while the optical transition in near IR also facilitates harvesting electromagnetic energy at a broad spectrum from visible to IR.

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