Relevant bibliographies by topics / Peak Plasmon Absorption

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Peak Plasmon Absorption'

Author: Grafiati
Published: 5 June 2025
Last updated: 24 June 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Peak Plasmon Absorption.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Peak Plasmon Absorption"

1

Solidum, Ruelson S., Arnold C. Alguno, and Rey Capangpangan. "Controlling the Surface Plasmon Absorption of Silver Nanoparticles via Green Synthesis Using Pennisetum purpureum Leaf Extract." Key Engineering Materials 772 (July 2018): 73–77. http://dx.doi.org/10.4028/www.scientific.net/kem.772.73.

Full text
Abstract:
We report on the green synthesis of silver nanoparticles utilizing theP.purpureumleaf extract. Controlling the surface plasmon absorption of silver nanoparticles was achieved by regulating the amount of extract concentration and the molarity of silver nitrate solution. The surface plasmon absorption peak is found at around 430nm. The surface plasmon absorption peak have shifted to lower wavelength as the amount of extract is increased, while plasmon absorption peak shifts on a higher wavelength as the concentration of silver nitrate is increased before it stabilized at 430nm. This can be explained in terms of the available nucleation sites promoted by the plant extract as well as the available silver ions present in silver nitrate solution.
APA, Harvard, Vancouver, ISO, and other styles
2

Hashemi, Mahdieh, Narges Ansari, and Mahsa Vazayefi. "Absorption peak wavelength and bandwidth control in MoS2-based absorbers on the basis of SPPs and LSPs excitation." Optical Materials Express 13, no. 4 (2023): 850. http://dx.doi.org/10.1364/ome.481687.

Full text
Abstract:
The nanometer-sized absorber that we introduced in this paper consists of a monolayer of atomically thin MoS2 on a silica substrate covered by inclined gold gratings. By selecting the period of the gold grating of the order of the incident light wavelength, both surface plasmon polaritons (SPPs) and localized surface plasmons (LSPs) can be excited in the structure at the visible spectrum. By selecting different values of the gold ribbon’s widths, we show that the excited modes can be adjusted to SPPs, LSPs, or SPPs and LSPs together. With the excitation of SPPs, the narrowband absorption peak wavelength, and with the excitation of LSPs, the FWHM of the absorption peak can be adjusted by the ribbon’s geometry parameters. In the case of simultaneous excitation of SPPs and LSPs, by increasing the ribbons’ inclination, the LSP peaks will redshift, while the SPP peaks blueshift, which leads to wider absorption peaks. The effect of increasing the ribbons’ height is opposite to that of the ribbons’ inclination, which is accompanied by the SPP peak red shift and LSP peak blue shift. This way, the more the height of the ribbons, the less the absorption peak bandwidth is. This paper’s results are a promising guide for designing plasmonic absorbers with desired bandwidths and peak wavelengths, which are widely demanded in designing photovoltaics and photonic sensors.
APA, Harvard, Vancouver, ISO, and other styles
3

Koshelev, Ilya R., Asiya I. Mukhammad, and Peter I. Gaiduk. "Modeling of plasmon resonance in periodic multilayer structures based on chromium with a surface island layer." Journal of the Belarusian State University. Physics, no. 1 (February 9, 2021): 26–32. http://dx.doi.org/10.33581/2520-2243-2021-1-26-32.

Full text
Abstract:
The optical properties of Cr/Si/Cr and Cr/CrSi2 /Cr structures with periodically located chromium islands are modeled using the finite-difference time domain method. These structures are characterized by the phenomenon of plasmon resonance. The dependences of the intensity and position of the plasmon absorption peak on the thickness and radius of the islands are determined. It was observed that when the island thickness increases to 120 nm, the intensity of the absorption peak increases to 69 % for the Cr/Si/Cr structure and to 55 % for the Cr/CrSi2 /Cr structure. It was found that the peak of plasmon absorption in the spectrum of the Cr/Si/Cr structure is at a shorter wavelength (8.4 µm for Cr/Si/Cr, 11.1 µm for Cr/CrSi2/Cr), and also has a higher intensity (the share of absorbed radiation is 14 % higher compared to the peak of plasmon absorption in the spectrum of the Cr/CrSi2 /Cr structure). The obtained dependences indicate that the Cr/Si/Cr and Cr/CrSi2 /Cr structures can be used as IR detectors.
APA, Harvard, Vancouver, ISO, and other styles
4

Silva, Jaime, Bruce F. Milne, and Fernando Nogueira. "On the Single Wall Carbon Nanotube Surface Plasmon Stability." EPJ Web of Conferences 233 (2020): 05009. http://dx.doi.org/10.1051/epjconf/202023305009.

Full text
Abstract:
The physics of surface plasmons has a long tradition in condensed matter theory but as the dimension of the systems reaches the nano scale, new effects appear. In this work, by calculating the absorption spectra of a single wall carbon nanotube, using time dependent density functional theory, the effect of adding/removing electrons on the surface plasmon energy is studied. It is shown that removing electrons from the single wall carbon nanotube does not affect the surface plasmon energy peak. In contrast, adding electrons to the single wall carbon nanotube will redshift the plasmonic peak energy, an effect that is explained by an increase of the electron effective mass.
APA, Harvard, Vancouver, ISO, and other styles
5

CHEN, FENGXIANG, WENYING XU, and LISHENG WANG. "RESEARCH ON OPTICAL ABSORPTION CHARACTERISTICS OF Ag NANOPARTICLES." Modern Physics Letters B 27, no. 11 (2013): 1350079. http://dx.doi.org/10.1142/s0217984913500796.

Full text
Abstract:
In this work, Ag nanoparticles were deposited on quartz glass substrates by magnetron sputtering method, and the morphology was characterized by SEM. Ag nanoparticle surface plasmon resonance characteristics were observed by transmittance measurement. The experimental results demonstrated an increase in particle size that was correlated to an increase in sputtering time and a plasmon resonance absorption peak redshift. This phenomenon was partially explained by Mie scattering model. The differences between our theoretical analysis and experimental results show that both the shape of and the spacing between nanoparticles are key parameters affecting plasmon resonance peak location.
APA, Harvard, Vancouver, ISO, and other styles
6

Nika, Denis, Evghenii Pokatilov, Vladimir Fomin, Josef Devreese, and Jacques Tempere. "Resonant Terahertz Light Absorption by Virtue of Tunable Hybrid Interface Phonon–Plasmon Modes in Semiconductor Nanoshells." Applied Sciences 9, no. 7 (2019): 1442. http://dx.doi.org/10.3390/app9071442.

Full text
Abstract:
Metallic nanoshells have proven to be particularly versatile, with applications in biomedical imaging and surface-enhanced Raman spectroscopy. Here, we theoretically demonstrate that hybrid phonon-plasmon modes in semiconductor nanoshells offer similar advantages in the terahertz regime. We show that, depending on tm,n,nhe doping of the semiconductor shells, terahertz light absorption in these nanostructures can be resonantly enhanced due to the strong coupling between interface plasmons and phonons. A threefold to fourfold increase in the absorption peak intensity was achieved at specific values of electron concentration. Doping, as well as adapting the nanoshell radius, allowed for fine-tuning of the absorption peak frequencies.
APA, Harvard, Vancouver, ISO, and other styles
7

Bogdanov, P. A., L. A. Sokura, A. V. Kremleva, and V. V. Vitkin. "Sol-Gel Synthesis of Uniform Arrays of Ag and Au Nanoparticles." Reviews on Advanced Materials and Technologies 5, no. 1 (2023): 39–44. http://dx.doi.org/10.17586/2687-0568-2023-5-1-39-44.

Full text
Abstract:
The obtaining of uniform arrays of silver and gold nanoparticles with a surface density up to 3.3∙109 cm–2 on the zinc oxide buffer layers by sol-gel method is described. The variations of the solution composition and synthesis mode, layers coating and subsequent heat treatment were carried out. The absorption spectra of the obtained samples had a peak near 400–570 nm corresponding to the plasmon resonance in the Ag and Au nanoparticles. Wavelength and shape of Ag and Au nanoparticles plasmon peak varied depending on the synthesis mode: the use of ZnO buffer layers leads to an increase in the intensity of the nanoparticles plasmon peak, the annealing leads to a gradual decrease and broadening of the absorption peak of Ag and mixed Ag and Au nanoparticles arrays, but does not affect the peak of Au nanoparticles.
APA, Harvard, Vancouver, ISO, and other styles
8

Alireza, Heidari. "Biomedical and Biochemical Approaches and Strategies for Targeting and Delivery of Cadmium Oxide (CdO) Nanoparticles Aggregation Linked to DNA/RNA by Aryl Mercaptanes with Various Chain Length." Biomedicine and Chemical Sciences 1, no. 4 (2022): 215–24. https://doi.org/10.48112/bcs.v1i4.149.

Full text
Abstract:
CdO nanoparticles show a strong peak of Plasmon absorption in ultraviolet-visible zone. A strong interaction exists between the surface of CdO nanoparticles and aryl mercaptan compounds. Aryl mercaptan compounds cause to aggregation of CdO nanoparticles linked to DNA/RNA and hence, lead to widening of peak Plasmon of CdO nanoparticles surface at 550 (nm) and emerging a new peak at higher wavelength. In the current project, this optical characteristic of CdO nanoparticles is used to time investigate of interaction between different aryl mercaptanes and CdO nanoparticles. The results were shown that aryl mercaptan compounds with shorter chain length interact faster with CdO nanoparticles. Therefore, a simple and fast method for identification of aryl mercaptanes with various chain length using red shift in surficial Plasmon absorption is presented.
APA, Harvard, Vancouver, ISO, and other styles
9

Ye, Fenghua, Huan Ye, and Xiaozhi Wang. "Design and experimental verification of a perfect dual-band optical metamaterial absorber." Modern Physics Letters B 31, no. 08 (2017): 1750047. http://dx.doi.org/10.1142/s0217984917500476.

Full text
Abstract:
A perfect dual-band optical absorber is designed and measured. A low absorption peak (P1) and two high absorption peaks (P2 and P3) are obtained. The P1 peak is excited by the resonance of internal surface plasmon (ISP) mode. The P2 peak is resulted by the coupling of local surface plasma (LSP) modes and the resonance of ISP mode. The P3 peak is excited by the resonance of ISP mode. The damping constant of the gold film is optimization calculated in simulations. Measured results indicate that high absorption performed is obtained with different dielectric layers. The measured metamaterial absorber displays high absorption performed at TM and TE configurations. Moreover, the proposed metamaterial absorber is sensitivity on the change of the refractive index of the environmental media.
APA, Harvard, Vancouver, ISO, and other styles
10

Heidari, Alireza. "Biomedical and Biochemical Approaches and Strategies for Targeting and Delivery of Cadmium Oxide (CdO) Nanoparticles Aggregation Linked to DNA/RNA by Aryl Mercaptanes with Various Chain Length." Biomedicine and Chemical Sciences 1, no. 4 (2022): 215–24. http://dx.doi.org/10.48112/bcs.v1i4.149.

Full text
Abstract:
CdO nanoparticles show a strong peak of Plasmon absorption in ultraviolet-visible zone. A strong interaction exists between the surface of CdO nanoparticles and aryl mercaptan compounds. Aryl mercaptan compounds cause to aggregation of CdO nanoparticles linked to DNA/RNA and hence, lead to widening of peak Plasmon of CdO nanoparticles surface at 550 (nm) and emerging a new peak at higher wavelength. In the current project, this optical characteristic of CdO nanoparticles is used to time investigate of interaction between different aryl mercaptanes and CdO nanoparticles. The results were shown that aryl mercaptan compounds with shorter chain length interact faster with CdO nanoparticles. Therefore, a simple and fast method for identification of aryl mercaptanes with various chain length using red shift in surficial Plasmon absorption is presented.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Peak Plasmon Absorption"

1

Vijayarangan, Vinodini. "Application des plasmas froids à la pénétration de principes actifs dans la peau." Electronic Thesis or Diss., Orléans, 2021. http://www.theses.fr/2021ORLE3207.

Full text
Abstract:
Cette thèse s’est déroulée dans le cadre d’un contrat CIFRE au sein de LVMH Recherche, en collaboration avec deux laboratoires académiques : le GREMI (Université d’Orléans/CNRS) et le CBM (CNRS). Elle porte sur l’étude de l’utilisation d’un jet de plasma froid à pression atmosphérique pour la pénétration cutanée de molécules d’intérêt cosmétique. Cette thèse s’est effectuée selon trois axes majeurs. Dans le premier, les travaux ont consisté à identifier et évaluer les caractéristiques d’un jet plasma face à un explant de peau. Une étude a été réalisée afin d’observer le comportement d’un flux d’hélium lors de traitements plasma aux caractéristiques variées par imagerie Schlieren, d’identifier le type d’espèces excitées produites par spectroscopie,de mesurer le champ électrique associé au jet plasma et la température de celui-ci dans l’environnement de l’explant. Le deuxième axe de l’étude a été focalisé sur les perturbations induites sur l’explant. L’impact d’un traitement plasma sur la barrière cutanée a été évalué par le biais de mesures de perte insensible en eau, de pH,de mouillabilité et de dégradation des lipides cutanés. L’intégrité de la structure du collagène a été visualisé par AFM et celle des couches épidermiques et dermiques par immunomarquage. Enfin dans le troisième, les travaux ont porté sur la pénétration cutanée après traitement plasma en utilisant des molécules fluorescentes ainsi que des principes actifs d’intérêt cosmétique tels que la caféine et l’acide hyaluronique. La pénétration effective de ces molécules à travers la peau a été évaluée, mesurée et quantifiée grâce à l’utilisation de cellules de Franz avec une quantification par des mesures d’absorbance, en HPLC et par imagerie en fluorescence ou MALDI FTICR sur des coupes obtenues à partir d’explants traités. Les études réalisées suivant ces trois axes ont ainsi permis de mettre en évidence les paramètres clés permettant une pénétration cutanée efficace et sans dommage pour la peau par traitement plasma froid<br>This thesis was performed under a CIFRE contract within LVMH Research, in collaboration with two academic laboratories : GREMI (University of Orléans / CNRS) and CBM (CNRS). The aim of the project was to assess the use of a cold atmospheric pressure plasma jet for the cutaneous penetration of molecules of cosmetic interest. This thesis was carried out along three major axes. In the first, the work consisted in identifying and evaluating the characteristics of a plasma jet in front of a skin explant. A study was carried out to observe the behavior of a helium flow during plasma treatments with various characteristics by Schlieren imaging, to identify the type of excited species produced by spectroscopy, to measure the electric field associated with the plasma jet and its temperature in the environment of the explant. The second axis of the study was focused on the disturbances induced on the skin explant. The impact of plasma treatment on the skin barrier was assessed through measurements of transepidermal water loss, pH, wettability and skin lipid degradation. The structural integrity of collagen was visualized by AFM and that of the epidermal and dermal layers by immunostaining. Finally, in thethird axis, the work focused on skin penetration after plasma treatment using fluorescent molecules as well asactive ingredients of cosmetic interest such as caffeine and hyaluronic acid. The effective penetration of these molecules through the skin was evaluated, measured and quantified using Franz cells with quantification byabsorbance measurements, by HPLC and by fluorescence or MALDI FTICR imaging on sections obtained. from treated explants. The studies carried out along these three axes have thus made it possible to highlight the key parameters allowing effective skin penetration without damage to the skin by cold plasma treatment
APA, Harvard, Vancouver, ISO, and other styles
2

Pellerin, Boudriau Vincent. "Étude spectroscopique et électrique de décharges contrôlées par barrières diélectriques en régime multi-pics." Thèse, 2018. http://hdl.handle.net/1866/22213.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Peak Plasmon Absorption"

1

Stagon, Stephen, and Ryan Scherzer. "Nanostructured Aluminum Films: Deep Ultraviolet Absorption from Glancing Angle Physical Vapor Deposition." In Encyclopedia of Aluminum and Its Alloys. CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000338.

Full text
Abstract:
This entry reports on the facile fabrication and characterization of aluminum (Al) nanoparticle arrays that absorb strongly in deep ultraviolet. First, Al nanoparticle arrays are fabricated using glancing angle physical vapor deposition and have average diameters of ~30 nm. After subsequent annealing, the structures become oxidized on the exterior with an Al metal core. Ultraviolet visible spectroscopy is performed to characterize the optical absorbance of the structures before and after annealing. The as-fabricated structures show strong and broad absorption centered near ~230 nm, and annealing in air at 400°C results in tightening and blue shifting of the absorption peak. Additionally, annealing results in a decrease in overall absorption intensity. These new results may be potentially useful for tandem or plasmon-assisted photovoltaics.
APA, Harvard, Vancouver, ISO, and other styles
2

Vadiraj B Tangod, Dr, Dayanand Lalasangi, and Dr Sangeeta Kulkarni. "NANOPARTICLE RESONANCE MECHANISM BEHAVIOUR IN A DYE ENVIRONMENT." In Futuristic Trends in Chemical Material Sciences & Nano Technology Volume 3 Book 24. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3becs24p5ch2.

Full text
Abstract:
Nanoscience and nanotechnology are recent breakthrough scientific and technological advancements that have been advancing at a breakneck rate over the last decade. Because of the high surface-to-volume ratio, the quantum size effect, and electrodynamic interactions, materials in the nanoscale size domain exhibit behaviour that is transitional between that of a macroscopic solid and that of an atomic or molecular system.Mie's Scattering theory was used to explore the optical characteristics of nano particles and their dependency on particle size. The surface plasmon resonance (SPR) is connected to the absorption spectra of gold nanoparticles with sizes ranging from 4 to 12nm. Our major aim is to use Mie's theory and available simulations to compute the extinction, absorption, and scattering coefficients of gold nanoparticles of various sizes. The observed results show that when the size of the nanoparticles rises from 4 to 50nm, the extinction efficiency at the resonant peak improves, as does the SPR shift from 520nm to 570nm.The fluorescence and optical absorption intensities of the ADS680HO laser dyes in alcohol solvents with and without AuNP/AgNP bonding reveal quenching. This is related to the size, shape, energy transfer, and interaction of the AuNPs/AgNPs with the dye. Fluorescence quenching using AuNPs/AgNPs and ADS680HO laser dye has various uses, particularly in biomolecular labelling and fluorescence patterning.
APA, Harvard, Vancouver, ISO, and other styles
3

Ghazaryan, Hovhannes, and Areg Hovhannisyan. "Comparison of the Pharmacokinetics of Eflornithine after Application of Eflornithine Cream and “Eflornithine: Armenicum” Composition in Rates." In New Insights Into Pharmacodynamics [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105742.

Full text
Abstract:
This chapter reports the study results to determine percutaneous absorption and pharmacokinetics of eflornithine following topical treatment with eflornithine hydrochloride 13.9% cream and “eflornithine–armenicum” composition in rats. The model of aerobic wounds was developed. Eflornithine hydrochloride cream (dose of 460 mg/kg) was applied in group I, and “eflornithine–armenicum” composition was applied in group II at a same dose of Eflornithine. The plasma concentration-time profile of racemic eflornithine following frequent sampling was determined by the HPLC method (LLOQ, 1.5 ng/ml). Eflornithine concentrations were measurable at 24 h, with peak concentrations in plasma 5.3 ng/ml after cream and 3.8 ng/ml after composition application (p &lt; 0.001) and the average time to reach the maximum concentration of eflornithine increases from 2 h to 3.3 h. The area under the pharmacokinetic curve was decreased after composition application by 25%. Eflornithine was eliminated from plasma with a mean terminal half-life of 11.6 hours. It can be assumed that the use of “eflornithine–armenicum” composition allows for maintaining the optimal concentration of two anti-inflammatory compounds at the site of application for a long time, which can improve their pharmacological effect compared to separate use of eflornithine cream.
APA, Harvard, Vancouver, ISO, and other styles
4

Weng, Lingang, Qinfeng Shi, Weiming Lu, et al. "Pilot Study on Deep Denitrification from Municipal Solid Waste Incineration Flue Gas by Narrow Pulse Discharge Reaction Coupling with Wet Adsorption." In Advances in Transdisciplinary Engineering. IOS Press, 2023. http://dx.doi.org/10.3233/atde230375.

Full text
Abstract:
To solve the issues existed in the traditional deep denitrification treatment technology for Municipal Solid Waste Incineration flue gas, such as complex system, large investment and high operating cost, a new method of deep denitrification by narrow pulse discharge reaction coupling with wet adsorption was proposed. The deep denitration of municipal solid waste incineration flue gas via the non-thermal plasma generated by the self-developed nanosecond pulse power corona discharge was studied. The results show that the removal efficiency of NO and NOx was enhanced when the power supply frequency and residence time were increased. Under the case with single corona discharge reactor when the peak voltage is 82 kV, the frequency is 400 Hz and the residence time is 2s, the removal efficiency of NO and NOx is 81.0% or 44.8% respectively. NOx removal efficiency can be significantly improved by the process of narrow pulse discharge reaction coupling with wet absorption, the average concentration of NOx at the outlet is 43.9 mg/m3, and the average removal efficiency of NOx is 64.1%, which is 19.8% higher than the efficiency of single narrow pulse discharge reaction, the narrow pulse discharge reactor has no obvious effect on the conversion of the original low concentration N2O and CO in the municipal solid waste incineration flue gas, nor new N2O and CO were produced. The research results of this paper have positive guiding significance for the industrial application of narrow pulse discharge reactor in the deep denitration of municipal solid waste incineration flue gas.
APA, Harvard, Vancouver, ISO, and other styles
5

"as the subjects. In a 2 × 2 trial, for example, each subject is given a single dose of T and R and blood samples are taken at a series of time points subsequent to dosing. Each blood sample is then assayed to de-termine the concentration of drug in the blood plasma. Often the blood sampling is taken more frequently during what is expected to be the absorption phase of the drug and then less frequently during the elimi-nation phase. For each subject and period the concentrations of drug in the blood are plotted against the corresponding sampling times to give a concentration-time profile for that subject and period. A typical profile is given in Figure 7.1. Once the drug gets past the stomach and into the small intestine it begins to be absorbed into the blood, eventually reaching a peak con-centration. From then on the concentration diminishes as the drug is eliminated from the body. The area under the profile is referred to as." In Design and Analysis of Cross-Over Trials. Chapman and Hall/CRC, 2003. http://dx.doi.org/10.1201/9781420036091-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Peak Plasmon Absorption"

1

Dewasi, Avijit, and Anirban Mitra. "Ag-nanoislands Mediated TiO2 Multilayer Thin Films towards Perfect Absorber." In JSAP-OSA Joint Symposia. Optica Publishing Group, 2018. http://dx.doi.org/10.1364/jsap.2018.18p_211b_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Lv, Wei, Todd P. Otanicar, Patrick E. Phelan, Lenore Dai, Robert A. Taylor, and Rajasekaran Swaminathan. "Surface Plasmon Resonance Shifts of a Dispersion of Core-Shell Nanoparticles for Efficient Solar Absorption." In ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/mnhmt2012-75090.

Full text
Abstract:
Nanoparticles are known to offer a variety of benefits for thermal transport, and of particular relevance here are the vast changes to the radiative properties due to the large extinction cross section at the corresponding surface plasmon resonance wavelength [1, 2]. Recent papers have indicated that dielectric core metallic shell nanoparticles yielded a plasmon resonance tunable from ultraviolet to infrared by changing the ratio of core radius to the total radius [3–6]. We are interested in developing a dispersion of core-shell multifunctional nanoparticles capable of dynamically changing their volume ratio and thus their spectral radiative properties. This work addresses the plasmon resonance tuning ranges for different metallic shell nanoparticles, and explores the solar-weighted efficiencies of corresponding core-shell nanoparticle dispersions. Through our electrostatic model, we achieve a shift in the plasmon resonance peak from a wavelength of about 500 nm to around 1500 nm for Au-coated silica core nanoparticles. Using core-shell nanoparticles dispersions, we show that it is possible to create efficient spectral solar absorption fluids. We also demonstrate that it is possible to design materials for applications which require variable spectral absorption or scattering.
APA, Harvard, Vancouver, ISO, and other styles
3

Tanahashi, I., T. Tohda, H. Inouye, and A. Mito. "Preparation and nonlinear optical properties of Au/glass composite thin films." In Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/bgppf.1997.jsue.30.

Full text
Abstract:
Small metal particles embedded in glasses have been widely studied as resonant type third- order nonlinear optical materials for photonic devices. We have prepared Au/SiO2, Au/Al2O3, Au/TiO2 composite thin films by a multitarget sputtering method. The χ(3) and τ of the composite thin films were investigated by means of femtosecond Z-scan and pump-probe experiment, respectively. In the optical-absorption spectra of the three types of the films, the clear absorption peak due to the surface plasmon resonance of Au particles is observed. The imaginary part of χ(3) and τ for the Au/TiO2 film were -3.6 × 10−7 esu and ~2 ps, respectively. The χ(3) of Au/SiO2, Au/Al2O3, AU/tiO2 films increased in that order.
APA, Harvard, Vancouver, ISO, and other styles
4

Inouye, H., K. Tanaka, I. Tanahashi, and K. Hirao. "Nonlinear response of gold nanoparticles embedded in glass matrix." In Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/bgppf.1997.jsue.31.

Full text
Abstract:
Small metal particles embedded in glass matrix has been investigated energetically both in the application research field and in the basic research field, since the strong enhancement of the third-order nonlinear optical susceptibility is observed around the peak of the surface-plasmon resonance. The mechanism of the nonlinear response, however, has not been clarified yet. We measured transient absorption spectra to investigate the nonlinear response of the gold nanoparticle system by the femtosecond pump-probe method. It is concluded that the nonlinear response originates mainly from the hot electron which is raised by the incidence of the pump pulse in sub-picosecond region. In the long time-scale region, where the time resolution is longer than 5~ps, transient change of the lattice temperature plays an important roll of the nonlinear response.
APA, Harvard, Vancouver, ISO, and other styles
5

Dang, Tang, Shuting Ma, Jiaqi Yang, Hitoshi Tabata, and Hiroaki Matsui. "Infrared Plasmonic Metasurfaces with Double Resonances for SEIRA Platforms." In JSAP-Optica Joint Symposia. Optica Publishing Group, 2023. http://dx.doi.org/10.1364/jsapo.2023.19p_a602_5.

Full text
Abstract:
Recent progress in the design and manufacturing of metal nanostructures has opened up new possibilities for generating and controlling localized electromagnetic fields and adjustable spectral resonances. Notably, the recent introduction of multispectral plasmonic nanoantennas has demonstrated significant potential for various spectroscopic applications, such as on-chip plasmon sensing of multiple analytes, as well as simultaneous detection of fluorescence and Raman signals in both the visible and infrared (IR) spectral domains. Surface-enhanced infrared absorptions (SEIRAs) can identify molecules of different chemical nature by matching the plasmonic resonances with the molecular-vibrational peaks. However, the metasurfaces with a single resonance show a narrow resonance peak, which cannot detect excitation wavelengths for a wide range of molecular vibrations. Therefore, it is required to simultaneously measure different molecular vibrations. Our presentation introduces IR metasurfaces with dual resonances consisting of two different sizes, enabling comprehensive measurements of molecular vibrations beyond conventional SEIRA devices with single resonance.
APA, Harvard, Vancouver, ISO, and other styles
6

Leone, G., V. De Stefano, R. Ferrelli, C. Barone, C. Garufi, and B. Bizzi. "PROTHROMBIN AND ANTITHROMBIN III IN PATIENTS WITH HEPATOCELLULAR CARCINOMA." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643209.

Full text
Abstract:
Prothrombin (F.II) and antithrombin III (AT III) levels were measured in 11 patients (mean age 61 years) with hepatocellular carcinoma; F.II antigen (Ag) mean levels (Laurell) were 1.39±0.53 U/ml and F.II activity (Ac) (clotting method) 0.9±0.21 U/ml; AT III Ag mean levels (radial immunodiffusion) were 1.18±0.32 U/ml and AT III heparin cofactor (HC) (amidolytic method) 1.15±0.31 U /ml. In 5 patients F.II Ag was higher than 1.2 U/ml; no patient had F.II Ag lower than 0.8 U/ml (normal range 0.7-1.2 U/ml). F.II Ac was in the normal range in all patients. In 4 patients both AT III Ag and HC were higher than 1.2 U/ml; no patient had AT III Ag and HC lower than 0.8 U/ml (normal range 0.75-1.2 U/ml). Seven patients had a long history of liver cirrhosis and 2 of them sho wed AT III Ag and HC of 1.8 U/ml; one of these two patients had F.II Ag and Ac around 1.00 U/ml, whereas the other had F.II Ag 2.4 U/ml and F.II Ac 1.2 U/ml. In these two patients a prelimina ry more extensive study was performed. In both subjects AT III plasma crossed immunoelectrophoresis was normal in the presence and absence of heparin and AT III crossed immunoelectrofocusing (CIEF) showed a normal pattern of 6 peaks (pH 5.2-4.6) and two additional small peaks at pH 4.5 and 5.4. In the patient with in creased F.II Ag the CIEF of plasma prothrombin showed a large peak with asymmetric branches at pH 5.2-4.9, as in the control, and a large additional peak at pH 5.9; after plasma absorption with Al(OH), the F.II CIEF pattern showed only the abnormal peek. We conclude that in patients with hepatocellular carcinoma F.II and AT III are normal, independently of previous history of cirrhosis; moreover, in agreement with previous studies (N.Engl.J. Med. 310,1427,1984), an abnormal prothrombin, which we demonstra ted characterizable by the CIEF, can be synthesized.
APA, Harvard, Vancouver, ISO, and other styles
7

Leite, I., M. C. Navarrete, N. Díaz-Herrera, A. Gonzalez Cano, and O. Esteban. "An experimental evaluation of the behavior of SPR fiber sensors in absorptive medium when plasmons are tuned to absorption peaks: method for selective measurement." In 21st International Conference on Optical Fibre Sensors (OFS21). SPIE, 2011. http://dx.doi.org/10.1117/12.885841.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Zhao, Xin, and Yung C. Shin. "Ablation Dynamics of Silicon by Femtosecond Laser and the Role of Early Plasma." In ASME 2013 International Manufacturing Science and Engineering Conference collocated with the 41st North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/msec2013-1107.

Full text
Abstract:
In this paper, the femtosecond laser ablation of silicon is investigated by a two-dimensional hydrodynamic model. The ablation depth of the silicon wafer ablated in air at different laser intensities is calculated, and the corresponding experimental measurements are carried out for validation. Two different ablation regimes have been identified by varying the laser fluence. While two-photon absorption dominates in the low fluence regime (&lt; 2 J/cm2), electron heat diffusion is a major energy transport mechanism at higher laser fluences (&gt; 2 J/cm2). The ablation efficiency first increases with the laser fluence, and reaches the peak value at the laser fluence around 8 J/cm2. It starts to drop when the laser fluence further increases, because of the early plasma absorption of the laser beam energy.
APA, Harvard, Vancouver, ISO, and other styles
9

Tombling, C., M. M. Stallard, and J. S. Roberts. "Modulation of Excitonic Quenching in a Selectively Doped Single Quantum Well." In Quantum Wells for Optics and Opto-Electronics. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/qwoe.1989.pd3.

Full text
Abstract:
Recently the characteristic optical absorption of quantum well structures under the influence of an electron (or electron-hole) plasma has attracted much attention in both modulation doped structures1,2 and optically non-linear devices3. We present here the first direct experimental evidence of room temperature excitonic recovery in a depletion mode selectively doped GaAs single quantum well. Quenching of the excitonic resonance is achieved in this type of structure when the electron Fermi level in the quantum well exceeds the energy of the nz=1 sub-band, as the states normally available for absorption are filled3. The carrier concentration in the quantum well is varied by a pn junction, effectively enabling the transition from a doped to an undoped quantum well to be observed. Mesa etched photodiodes and slab waveguide structures are considered in this work and both reveal the recovery of an excitonic peak. The modulation of absorption achieved is Δα ≈8000cm−1.
APA, Harvard, Vancouver, ISO, and other styles
10

Rao, Z. H., C. H. Lin, L. Jiang, et al. "Investigations of Femtosecond-Nanosecond Dual-Beam Laser Ablation of Dielectrics." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18188.

Full text
Abstract:
A multi-scale (in temporal domain) model was developed to study the ablation of dielectrics using a femtosecond (fs)-nanosecond (ns) dual-beam laser system. The model is an integration of the plasma model and improved two-temperature model for the fs laser ablation, and Fourier’s law for the ns laser ablation. The model is used to investigate the ablation for dielectrics when a fs pulse is shot at the peak of a ns pulse. It is found that the fs laser pulse can result in the increase of absorption of the ns laser energy, leading to a much higher material removal rate as compared to fs laser ablation alone or ns laser ablation alone. The enhancement of ns laser energy absorption is caused by the increased electron density and the formation of a tiny crater in the material created by the fs laser pulse. The corresponding experiment using a Ti:Sapphire fs laser (Legend-F, Coherent) and a Nd:YAG ns UV laser (Avia-X, Coherent) was also conducted and the results are consistent with the modeling predictions.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Peak Plasmon Absorption' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography